Convert.ToString Méthode

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(int value, IFormatProvider ^ provider);

public static string ToString (int value, IFormatProvider provider);

public static string ToString (int value, IFormatProvider? provider);

static member ToString : int * IFormatProvider -> string

Public Shared Function ToString (value As Integer, provider As IFormatProvider) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant définit une classe personnalisée NumberFormatInfo qui définit son signe négatif comme chaîne « ~ » et son signe positif comme chaîne « ! ». Il appelle ensuite la ToString(Int32, IFormatProvider) méthode pour convertir chaque élément d’un tableau d’entiers en sa représentation de chaîne équivalente. La conversion utilise la culture invariante ainsi que l’objet personnalisé NumberFormatInfo .

int[] numbers = { Int32.MinValue, Int32.MaxValue};
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

foreach (int number in numbers)
   Console.WriteLine("{0,-12}  -->  {1,12}",
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                     Convert.ToString(number, nfi));
// The example displays the following output:
//       -2147483648  -->  ~2147483648
//       2147483647  -->  2147483647

let numbers = [| Int32.MinValue; Int32.MaxValue |]
let nfi = NumberFormatInfo()
nfi.NegativeSign <- "~"
nfi.PositiveSign <- "!"

for number in numbers do
    printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture),-12}  -->  {Convert.ToString(number, nfi),12}"
// The example displays the following output:
//       -2147483648  -->  ~2147483648
//       2147483647  -->  2147483647

Dim numbers() As Integer = { Int32.MinValue, Int32.MaxValue}
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

For Each number As Integer In numbers
   Console.WriteLine("{0,-12}  -->  {1,12}", _
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                     Convert.ToString(number, nfi))
Next
' The example displays the following output:
'       -2147483648  -->  ~2147483648
'       2147483647   -->  2147483647

Remarques

Cette implémentation est identique à Int32.ToString(IFormatProvider).

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(short value, int toBase);

public static string ToString (short value, int toBase);

static member ToString : int16 * int -> string

Public Shared Function ToString (value As Short, toBase As Integer) As String

Paramètres

Retours

Représentation sous forme de chaîne de value en base toBase.

Exceptions

Exemples

L’exemple suivant convertit chaque élément d’un tableau d’entiers signés 16 bits en représentations de chaîne binaire, octale, décimale et hexadécimale équivalentes.

int[] bases = { 2, 8, 10, 16};
short[] numbers = { Int16.MinValue, -13621, -18, 12, 19142, Int16.MaxValue };

foreach (int baseValue in bases)
{
   Console.WriteLine("Base {0} conversion:", baseValue);
   foreach (short number in numbers)
   {
      Console.WriteLine("   {0,-8}  -->  0x{1}",
                        number, Convert.ToString(number, baseValue));
   }
}
// The example displays the following output:
//       Base 2 conversion:
//          -32768    -->  0x1000000000000000
//          -13621    -->  0x1100101011001011
//          -18       -->  0x1111111111101110
//          12        -->  0x1100
//          19142     -->  0x100101011000110
//          32767     -->  0x111111111111111
//       Base 8 conversion:
//          -32768    -->  0x100000
//          -13621    -->  0x145313
//          -18       -->  0x177756
//          12        -->  0x14
//          19142     -->  0x45306
//          32767     -->  0x77777
//       Base 10 conversion:
//          -32768    -->  0x-32768
//          -13621    -->  0x-13621
//          -18       -->  0x-18
//          12        -->  0x12
//          19142     -->  0x19142
//          32767     -->  0x32767
//       Base 16 conversion:
//          -32768    -->  0x8000
//          -13621    -->  0xcacb
//          -18       -->  0xffee
//          12        -->  0xc
//          19142     -->  0x4ac6
//          32767     -->  0x7fff

let bases = [| 2; 8; 10; 16 |]
let numbers = [| Int16.MinValue; -13621s; -18s; 12s; 19142s; Int16.MaxValue |]

for baseValue in bases do
    printfn $"Base {baseValue} conversion:"
    for number in numbers do
        printfn $"   {number,-8}  -->  0x{Convert.ToString(number, baseValue)}"
// The example displays the following output:
//       Base 2 conversion:
//          -32768    -->  0x1000000000000000
//          -13621    -->  0x1100101011001011
//          -18       -->  0x1111111111101110
//          12        -->  0x1100
//          19142     -->  0x100101011000110
//          32767     -->  0x111111111111111
//       Base 8 conversion:
//          -32768    -->  0x100000
//          -13621    -->  0x145313
//          -18       -->  0x177756
//          12        -->  0x14
//          19142     -->  0x45306
//          32767     -->  0x77777
//       Base 10 conversion:
//          -32768    -->  0x-32768
//          -13621    -->  0x-13621
//          -18       -->  0x-18
//          12        -->  0x12
//          19142     -->  0x19142
//          32767     -->  0x32767
//       Base 16 conversion:
//          -32768    -->  0x8000
//          -13621    -->  0xcacb
//          -18       -->  0xffee
//          12        -->  0xc
//          19142     -->  0x4ac6
//          32767     -->  0x7fff

Dim bases() As Integer = { 2, 8, 10, 16}
Dim numbers() As Short = { Int16.MinValue, -13621, -18, 12, 19142, _
                           Int16.MaxValue }

For Each base As Integer In bases
   Console.WriteLine("Base {0} conversion:", base)
   For Each number As Short In numbers
      Console.WriteLine("   {0,-8}  -->  0x{1}", _
                        number, Convert.ToString(number, base))
   Next
Next
' The example displays the following output:
'       Base 2 conversion:
'          -32768    -->  0x1000000000000000
'          -13621    -->  0x1100101011001011
'          -18       -->  0x1111111111101110
'          12        -->  0x1100
'          19142     -->  0x100101011000110
'          32767     -->  0x111111111111111
'       Base 8 conversion:
'          -32768    -->  0x100000
'          -13621    -->  0x145313
'          -18       -->  0x177756
'          12        -->  0x14
'          19142     -->  0x45306
'          32767     -->  0x77777
'       Base 10 conversion:
'          -32768    -->  0x-32768
'          -13621    -->  0x-13621
'          -18       -->  0x-18
'          12        -->  0x12
'          19142     -->  0x19142
'          32767     -->  0x32767
'       Base 16 conversion:
'          -32768    -->  0x8000
'          -13621    -->  0xcacb
'          -18       -->  0xffee
'          12        -->  0xc
'          19142     -->  0x4ac6
'          32767     -->  0x7fff

let bases = [2; 8; 10; 16]
let numbers = [ Int16.MinValue; -13621s; -18s; 12s; 19142s; Int16.MaxValue ]

for baseValue in bases do
    printfn "Base %i conversion:" baseValue
    for number in numbers do
        printfn "   % -8i  -->  0x%s" number (Convert.ToString (number, baseValue))
// The example displays the following output:
//     Base 2 conversion:
//        -32768    -->  0x1000000000000000
//        -13621    -->  0x1100101011001011
//        -18       -->  0x1111111111101110
//         12       -->  0x1100
//         19142    -->  0x100101011000110
//         32767    -->  0x111111111111111
//     Base 8 conversion:
//        -32768    -->  0x100000
//        -13621    -->  0x145313
//        -18       -->  0x177756
//         12       -->  0x14
//         19142    -->  0x45306
//         32767    -->  0x77777
//     Base 10 conversion:
//        -32768    -->  0x-32768
//        -13621    -->  0x-13621
//        -18       -->  0x-18
//         12       -->  0x12
//         19142    -->  0x19142
//         32767    -->  0x32767
//     Base 16 conversion:
//        -32768    -->  0x8000
//        -13621    -->  0xcacb
//        -18       -->  0xffee
//         12       -->  0xc
//         19142    -->  0x4ac6
//         32767    -->  0x7fff

Remarques

Si value est positif et toBase est 2, 8 ou 16, la chaîne retournée utilise une représentation de signe et de magnitude. Si value est négatif et toBase est 2, 8 ou 16, la chaîne retournée utilise la représentation du complément de deux. Cela signifie que le bit d’ordre élevé de l’octet d’ordre élevé (bit 15) est interprété comme le bit de signe. Si la ToString(Int16, Int32) méthode est appelée pour créer une chaîne qui sera convertie ultérieurement en nombre, une méthode correspondante qui suppose qu’une représentation numérique similaire doit être appelée pour effectuer la conversion. Ces méthodes incluent Convert.ToInt16(String, Int32) et Int16.Parse(String, NumberStyles).

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(DateTime value, IFormatProvider ^ provider);

public static string ToString (DateTime value, IFormatProvider provider);

public static string ToString (DateTime value, IFormatProvider? provider);

static member ToString : DateTime * IFormatProvider -> string

Public Shared Function ToString (value As DateTime, provider As IFormatProvider) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit une DateTime valeur en sa représentation de chaîne équivalente dans huit cultures différentes.

// Specify the date to be formatted using various cultures.
DateTime tDate = new DateTime(2010, 4, 15, 20, 30, 40, 333);
// Specify the cultures.
string[] cultureNames = { "en-US", "es-AR", "fr-FR", "hi-IN",
                          "ja-JP", "nl-NL", "ru-RU", "ur-PK" };

Console.WriteLine("Converting the date {0}: ",
                  Convert.ToString(tDate,
                          System.Globalization.CultureInfo.InvariantCulture));

foreach (string cultureName in cultureNames)
{
   System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
   string dateString = Convert.ToString(tDate, culture);
   Console.WriteLine("   {0}:  {1,-12}",
                     culture.Name, dateString);
}
// The example displays the following output:
//       Converting the date 04/15/2010 20:30:40:
//          en-US:  4/15/2010 8:30:40 PM
//          es-AR:  15/04/2010 08:30:40 p.m.
//          fr-FR:  15/04/2010 20:30:40
//          hi-IN:  15-04-2010 20:30:40
//          ja-JP:  2010/04/15 20:30:40
//          nl-NL:  15-4-2010 20:30:40
//          ru-RU:  15.04.2010 20:30:40
//          ur-PK:  15/04/2010 8:30:40 PM

// Specify the date to be formatted using various cultures.
let tDate = DateTime(2010, 4, 15, 20, 30, 40, 333)
// Specify the cultures.
let cultureNames = 
    [| "en-US"; "es-AR"; "fr-FR"; "hi-IN";
        "ja-JP"; "nl-NL"; "ru-RU"; "ur-PK" |]

printfn $"Converting the date {Convert.ToString(tDate, CultureInfo.InvariantCulture)}: "

for cultureName in cultureNames do
    let culture = CultureInfo cultureName
    let dateString = Convert.ToString(tDate, culture)
    printfn $"   {culture.Name}:  {dateString,-12}"
// The example displays the following output:
//       Converting the date 04/15/2010 20:30:40:
//          en-US:  4/15/2010 8:30:40 PM
//          es-AR:  15/04/2010 08:30:40 p.m.
//          fr-FR:  15/04/2010 20:30:40
//          hi-IN:  15-04-2010 20:30:40
//          ja-JP:  2010/04/15 20:30:40
//          nl-NL:  15-4-2010 20:30:40
//          ru-RU:  15.04.2010 20:30:40
//          ur-PK:  15/04/2010 8:30:40 PM

' Specify the date to be formatted using various cultures.
Dim tDate As New Date(2010, 4, 15, 20, 30, 40, 333)
' Specify the cultures.
Dim cultureNames() As String = { "en-US", "es-AR", "fr-FR", "hi-IN", _
                                 "ja-JP", "nl-NL", "ru-RU", "ur-PK" }

Console.WriteLine("Converting the date {0}: ", _
                  Convert.ToString(tDate, _
                          System.Globalization.CultureInfo.InvariantCulture))

For Each cultureName As String In CultureNames
   Dim culture As New System.Globalization.CultureInfo(cultureName)
   Dim dateString As String = Convert.ToString(tDate, culture)
   Console.WriteLine("   {0}:  {1,-12}", _
                     culture.Name, dateString)
Next             
' The example displays the following output:
'       Converting the date 04/15/2010 20:30:40:
'          en-US:  4/15/2010 8:30:40 PM
'          es-AR:  15/04/2010 08:30:40 p.m.
'          fr-FR:  15/04/2010 20:30:40
'          hi-IN:  15-04-2010 20:30:40
'          ja-JP:  2010/04/15 20:30:40
'          nl-NL:  15-4-2010 20:30:40
'          ru-RU:  15.04.2010 20:30:40
'          ur-PK:  15/04/2010 8:30:40 PM

Remarques

Cette implémentation est identique à DateTime.ToString(IFormatProvider).

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(double value, IFormatProvider ^ provider);

public static string ToString (double value, IFormatProvider provider);

public static string ToString (double value, IFormatProvider? provider);

static member ToString : double * IFormatProvider -> string

Public Shared Function ToString (value As Double, provider As IFormatProvider) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit chaque élément d’un tableau de valeurs en sa représentation sous forme de Double chaîne équivalente dans quatre cultures différentes.

// Define an array of numbers to display.
double[] numbers = { -1.5345e16, -123.4321, 19092.123, 1.1734231911290e16 };
// Define the culture names used to display them.
string[] cultureNames = { "en-US", "fr-FR", "ja-JP", "ru-RU" };

foreach (double number in numbers)
{
   Console.WriteLine("{0}:", Convert.ToString(number,
                             System.Globalization.CultureInfo.InvariantCulture));
   foreach (string cultureName in cultureNames)
   {
      System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
      Console.WriteLine("   {0}: {1,20}",
                        culture.Name, Convert.ToString(number, culture));
   }
   Console.WriteLine();
}
// The example displays the following output:
//    -1.5345E+16:
//       en-US:          -1.5345E+16
//       fr-FR:          -1,5345E+16
//       ja-JP:          -1.5345E+16
//       ru-RU:          -1,5345E+16
//
//    -123.4321:
//       en-US:            -123.4321
//       fr-FR:            -123,4321
//       ja-JP:            -123.4321
//       ru-RU:            -123,4321
//
//    19092.123:
//       en-US:            19092.123
//       fr-FR:            19092,123
//       ja-JP:            19092.123
//       ru-RU:            19092,123
//
//    1.173423191129E+16:
//       en-US:   1.173423191129E+16
//       fr-FR:   1,173423191129E+16
//       ja-JP:   1.173423191129E+16
//       ru-RU:   1,173423191129E+16

// Define an array of numbers to display.
let numbers = [| -1.5345e16; -123.4321; 19092.123; 1.1734231911290e16 |]
// Define the culture names used to display them.
let cultureNames = [| "en-US"; "fr-FR"; "ja-JP"; "ru-RU" |]

for number in numbers do
    printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture)}:"
    for cultureName in cultureNames do
        let culture = CultureInfo cultureName
        printfn "   {culture.Name}: {Convert.ToString(number, culture),20}"
    printfn ""
// The example displays the following output:
//    -1.5345E+16:
//       en-US:          -1.5345E+16
//       fr-FR:          -1,5345E+16
//       ja-JP:          -1.5345E+16
//       ru-RU:          -1,5345E+16
//
//    -123.4321:
//       en-US:            -123.4321
//       fr-FR:            -123,4321
//       ja-JP:            -123.4321
//       ru-RU:            -123,4321
//
//    19092.123:
//       en-US:            19092.123
//       fr-FR:            19092,123
//       ja-JP:            19092.123
//       ru-RU:            19092,123
//
//    1.173423191129E+16:
//       en-US:   1.173423191129E+16
//       fr-FR:   1,173423191129E+16
//       ja-JP:   1.173423191129E+16
//       ru-RU:   1,173423191129E+16

' Define an array of numbers to display.
Dim numbers() As Double = { -1.5345e16, -123.4321, 19092.123, _
                            1.1734231911290e16 }
' Define the culture names used to display them.
Dim cultureNames() As String = { "en-US", "fr-FR", "ja-JP", "ru-RU" }

For Each number As Double In numbers
   Console.WriteLine("{0}:", Convert.ToString(number, _
                             System.Globalization.CultureInfo.InvariantCulture))
   For Each cultureName As String In cultureNames
      Dim culture As New System.Globalization.CultureInfo(cultureName)
      Console.WriteLine("   {0}: {1,20}", _
                        culture.Name, Convert.ToString(number, culture))
   Next
   Console.WriteLine()
Next   
' The example displays the following output:
'    -1.5345E+16:
'       en-US:          -1.5345E+16
'       fr-FR:          -1,5345E+16
'       ja-JP:          -1.5345E+16
'       ru-RU:          -1,5345E+16
'    
'    -123.4321:
'       en-US:            -123.4321
'       fr-FR:            -123,4321
'       ja-JP:            -123.4321
'       ru-RU:            -123,4321
'    
'    19092.123:
'       en-US:            19092.123
'       fr-FR:            19092,123
'       ja-JP:            19092.123
'       ru-RU:            19092,123
'    
'    1.173423191129E+16:
'       en-US:   1.173423191129E+16
'       fr-FR:   1,173423191129E+16
'       ja-JP:   1.173423191129E+16
'       ru-RU:   1,173423191129E+16

Remarques

Cette implémentation est identique à Double.ToString(IFormatProvider)

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::Decimal value, IFormatProvider ^ provider);

public static string ToString (decimal value, IFormatProvider provider);

public static string ToString (decimal value, IFormatProvider? provider);

static member ToString : decimal * IFormatProvider -> string

Public Shared Function ToString (value As Decimal, provider As IFormatProvider) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit chaque élément d’un tableau de valeurs en sa représentation sous forme de Decimal chaîne équivalente dans quatre cultures différentes.

// Define an array of numbers to display.
decimal[] numbers = { 1734231911290.16m, -17394.32921m,
                      3193.23m, 98012368321.684m };
// Define the culture names used to display them.
string[] cultureNames = { "en-US", "fr-FR", "ja-JP", "ru-RU" };

foreach (decimal number in numbers)
{
   Console.WriteLine("{0}:", Convert.ToString(number,
                             System.Globalization.CultureInfo.InvariantCulture));
   foreach (string cultureName in cultureNames)
   {
      System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
      Console.WriteLine("   {0}: {1,20}",
                        culture.Name, Convert.ToString(number, culture));
   }
   Console.WriteLine();
}
// The example displays the following output:
//    1734231911290.16:
//       en-US:     1734231911290.16
//       fr-FR:     1734231911290,16
//       ja-JP:     1734231911290.16
//       ru-RU:     1734231911290,16
//
//    -17394.32921:
//       en-US:         -17394.32921
//       fr-FR:         -17394,32921
//       ja-JP:         -17394.32921
//       ru-RU:         -17394,32921
//
//    3193.23:
//       en-US:              3193.23
//       fr-FR:              3193,23
//       ja-JP:              3193.23
//       ru-RU:              3193,23
//
//    98012368321.684:
//       en-US:      98012368321.684
//       fr-FR:      98012368321,684
//       ja-JP:      98012368321.684
//       ru-RU:      98012368321,684

// Define an array of numbers to display.
let numbers = 
    [| 1734231911290.16m; -17394.32921m; 3193.23m; 98012368321.684m |]
// Define the culture names used to display them.
let cultureNames = [| "en-US"; "fr-FR"; "ja-JP"; "ru-RU" |]

for number in numbers do
    printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture)}:"
    for cultureName in cultureNames do
        let culture = CultureInfo cultureName
        printfn $"   {culture.Name}: {Convert.ToString(number, culture),20}"
    printfn ""
// The example displays the following output:
//    1734231911290.16:
//       en-US:     1734231911290.16
//       fr-FR:     1734231911290,16
//       ja-JP:     1734231911290.16
//       ru-RU:     1734231911290,16
//
//    -17394.32921:
//       en-US:         -17394.32921
//       fr-FR:         -17394,32921
//       ja-JP:         -17394.32921
//       ru-RU:         -17394,32921
//
//    3193.23:
//       en-US:              3193.23
//       fr-FR:              3193,23
//       ja-JP:              3193.23
//       ru-RU:              3193,23
//
//    98012368321.684:
//       en-US:      98012368321.684
//       fr-FR:      98012368321,684
//       ja-JP:      98012368321.684
//       ru-RU:      98012368321,684

' Define an array of numbers to display.
Dim numbers() As Decimal = { 1734231911290.16d, -17394.32921d, _
                             3193.23d, 98012368321.684d }
' Define the culture names used to display them.
Dim cultureNames() As String = { "en-US", "fr-FR", "ja-JP", "ru-RU" }

For Each number As Decimal In numbers
   Console.WriteLine("{0}:", Convert.ToString(number, _
                             System.Globalization.CultureInfo.InvariantCulture))
   For Each cultureName As String In cultureNames
      Dim culture As New System.Globalization.CultureInfo(cultureName)
      Console.WriteLine("   {0}: {1,20}", _
                        culture.Name, Convert.ToString(number, culture))
   Next
   Console.WriteLine()
Next   
' The example displays the following output:
'    1734231911290.16:
'       en-US:     1734231911290.16
'       fr-FR:     1734231911290,16
'       ja-JP:     1734231911290.16
'       ru-RU:     1734231911290,16
'    
'    -17394.32921:
'       en-US:         -17394.32921
'       fr-FR:         -17394,32921
'       ja-JP:         -17394.32921
'       ru-RU:         -17394,32921
'    
'    3193.23:
'       en-US:              3193.23
'       fr-FR:              3193,23
'       ja-JP:              3193.23
'       ru-RU:              3193,23
'    
'    98012368321.684:
'       en-US:      98012368321.684
'       fr-FR:      98012368321,684
'       ja-JP:      98012368321.684
'       ru-RU:      98012368321,684

Remarques

Cette implémentation est identique à Decimal.ToString(IFormatProvider).

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(int value, int toBase);

public static string ToString (int value, int toBase);

static member ToString : int * int -> string

Public Shared Function ToString (value As Integer, toBase As Integer) As String

Paramètres

Retours

Représentation sous forme de chaîne de value en base toBase.

Exceptions

Exemples

L’exemple suivant convertit chaque élément d’un tableau d’entiers en représentations de chaînes binaires, hexadécimales, décimales et hexadécimales équivalentes.

int[] bases = { 2, 8, 10, 16};
int[] numbers = { Int32.MinValue, -19327543, -13621, -18, 12,
                             19142, Int32.MaxValue };

foreach (int baseValue in bases)
{
   Console.WriteLine("Base {0} conversion:", baseValue);
   foreach (int number in numbers)
   {
      Console.WriteLine("   {0,-15}  -->  0x{1}",
                        number, Convert.ToString(number, baseValue));
   }
}
// The example displays the following output:
//    Base 2 conversion:
//       -2147483648      -->  0x10000000000000000000000000000000
//       -19327543        -->  0x11111110110110010001010111001001
//       -13621           -->  0x11111111111111111100101011001011
//       -18              -->  0x11111111111111111111111111101110
//       12               -->  0x1100
//       19142            -->  0x100101011000110
//       2147483647       -->  0x1111111111111111111111111111111
//    Base 8 conversion:
//       -2147483648      -->  0x20000000000
//       -19327543        -->  0x37666212711
//       -13621           -->  0x37777745313
//       -18              -->  0x37777777756
//       12               -->  0x14
//       19142            -->  0x45306
//       2147483647       -->  0x17777777777
//    Base 10 conversion:
//       -2147483648      -->  0x-2147483648
//       -19327543        -->  0x-19327543
//       -13621           -->  0x-13621
//       -18              -->  0x-18
//       12               -->  0x12
//       19142            -->  0x19142
//       2147483647       -->  0x2147483647
//    Base 16 conversion:
//       -2147483648      -->  0x80000000
//       -19327543        -->  0xfed915c9
//       -13621           -->  0xffffcacb
//       -18              -->  0xffffffee
//       12               -->  0xc
//       19142            -->  0x4ac6
//       2147483647       -->  0x7fffffff

let bases = [| 2; 8; 10; 16 |]
let numbers = 
    [| Int32.MinValue; -19327543; -13621; -18; 12; 19142; Int32.MaxValue |]

for baseValue in bases do
    printfn $"Base {baseValue} conversion:"
    for number in numbers do
        printfn $"   {number,-15}  -->  0x{Convert.ToString(number, baseValue)}"
// The example displays the following output:
//    Base 2 conversion:
//       -2147483648      -->  0x10000000000000000000000000000000
//       -19327543        -->  0x11111110110110010001010111001001
//       -13621           -->  0x11111111111111111100101011001011
//       -18              -->  0x11111111111111111111111111101110
//       12               -->  0x1100
//       19142            -->  0x100101011000110
//       2147483647       -->  0x1111111111111111111111111111111
//    Base 8 conversion:
//       -2147483648      -->  0x20000000000
//       -19327543        -->  0x37666212711
//       -13621           -->  0x37777745313
//       -18              -->  0x37777777756
//       12               -->  0x14
//       19142            -->  0x45306
//       2147483647       -->  0x17777777777
//    Base 10 conversion:
//       -2147483648      -->  0x-2147483648
//       -19327543        -->  0x-19327543
//       -13621           -->  0x-13621
//       -18              -->  0x-18
//       12               -->  0x12
//       19142            -->  0x19142
//       2147483647       -->  0x2147483647
//    Base 16 conversion:
//       -2147483648      -->  0x80000000
//       -19327543        -->  0xfed915c9
//       -13621           -->  0xffffcacb
//       -18              -->  0xffffffee
//       12               -->  0xc
//       19142            -->  0x4ac6
//       2147483647       -->  0x7fffffff

Dim bases() As Integer = { 2, 8, 10, 16}
Dim numbers() As Integer = { Int32.MinValue, -19327543, -13621, -18, 12, _
                             19142, Int32.MaxValue }

For Each base As Integer In bases
   Console.WriteLine("Base {0} conversion:", base)
   For Each number As Integer In numbers
      Console.WriteLine("   {0,-15}  -->  0x{1}", _
                        number, Convert.ToString(number, base))
   Next
Next
' The example displays the following output:
'    Base 2 conversion:
'       -2147483648      -->  0x10000000000000000000000000000000
'       -19327543        -->  0x11111110110110010001010111001001
'       -13621           -->  0x11111111111111111100101011001011
'       -18              -->  0x11111111111111111111111111101110
'       12               -->  0x1100
'       19142            -->  0x100101011000110
'       2147483647       -->  0x1111111111111111111111111111111
'    Base 8 conversion:
'       -2147483648      -->  0x20000000000
'       -19327543        -->  0x37666212711
'       -13621           -->  0x37777745313
'       -18              -->  0x37777777756
'       12               -->  0x14
'       19142            -->  0x45306
'       2147483647       -->  0x17777777777
'    Base 10 conversion:
'       -2147483648      -->  0x-2147483648
'       -19327543        -->  0x-19327543
'       -13621           -->  0x-13621
'       -18              -->  0x-18
'       12               -->  0x12
'       19142            -->  0x19142
'       2147483647       -->  0x2147483647
'    Base 16 conversion:
'       -2147483648      -->  0x80000000
'       -19327543        -->  0xfed915c9
'       -13621           -->  0xffffcacb
'       -18              -->  0xffffffee
'       12               -->  0xc
'       19142            -->  0x4ac6
'       2147483647       -->  0x7fffffff

let bases = [2; 8; 10; 16]
let numbers = [ Int32.MinValue; -19327543; -13621; -18; 12; 19142; Int32.MaxValue ]

for baseValue in bases do
    printfn "Base %i conversion:" baseValue
    for number in numbers do
        printfn "   % -15i  -->  0x%s" number (Convert.ToString (number, baseValue))
// The example displays the following output:
//     Base 2 conversion:
//        -2147483648      -->  0x10000000000000000000000000000000
//        -19327543        -->  0x11111110110110010001010111001001
//        -13621           -->  0x11111111111111111100101011001011
//        -18              -->  0x11111111111111111111111111101110
//         12              -->  0x1100
//         19142           -->  0x100101011000110
//         2147483647      -->  0x1111111111111111111111111111111
//     Base 8 conversion:
//        -2147483648      -->  0x20000000000
//        -19327543        -->  0x37666212711
//        -13621           -->  0x37777745313
//        -18              -->  0x37777777756
//         12              -->  0x14
//         19142           -->  0x45306
//         2147483647      -->  0x17777777777
//     Base 10 conversion:
//        -2147483648      -->  0x-2147483648
//        -19327543        -->  0x-19327543
//        -13621           -->  0x-13621
//        -18              -->  0x-18
//         12              -->  0x12
//         19142           -->  0x19142
//         2147483647      -->  0x2147483647
//     Base 16 conversion:
//        -2147483648      -->  0x80000000
//        -19327543        -->  0xfed915c9
//        -13621           -->  0xffffcacb
//        -18              -->  0xffffffee
//         12              -->  0xc
//         19142           -->  0x4ac6
//         2147483647      -->  0x7fffffff

Remarques

Si value est positif et toBase a la valeur 2, 8 ou 16, la chaîne retournée utilise une représentation de signe et de magnitude. Si value est négatif et toBase a la valeur 2, 8 ou 16, la chaîne retournée utilise la représentation du complément de deux. Cela signifie que le bit d’ordre élevé de l’octet d’ordre le plus élevé (bit 31) est interprété comme le bit de signe. Si la ToString(Int32, Int32) méthode est appelée pour créer une chaîne qui sera convertie ultérieurement en nombre, une méthode correspondante qui suppose qu’une représentation numérique similaire doit être appelée pour effectuer la conversion. Ces méthodes incluent Convert.ToInt32(String, Int32) et Int32.Parse(String, NumberStyles).

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(short value, IFormatProvider ^ provider);

public static string ToString (short value, IFormatProvider provider);

public static string ToString (short value, IFormatProvider? provider);

static member ToString : int16 * IFormatProvider -> string

Public Shared Function ToString (value As Short, provider As IFormatProvider) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant définit une classe personnalisée NumberFormatInfo qui définit son signe négatif comme chaîne « ~ » et son signe positif comme chaîne « ! ». Il appelle ensuite la ToString(Int16, IFormatProvider) méthode pour convertir chaque élément d’un tableau d’entiers 16 bits en sa représentation sous forme de chaîne équivalente. La conversion utilise la culture invariante ainsi que l’objet personnalisé NumberFormatInfo .

short[] numbers = { Int16.MinValue, Int16.MaxValue};
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

foreach (short number in numbers)
   Console.WriteLine("{0,-8}  -->  {1,8}",
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                     Convert.ToString(number, nfi));
// The example displays the following output:
//       -32768    -->    ~32768
//       32767     -->     32767

let numbers = [| Int16.MinValue; Int16.MaxValue |]
let nfi = NumberFormatInfo()
nfi.NegativeSign <- "~"
nfi.PositiveSign <- "!"

for number in numbers do
    printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture),-8}  -->  {Convert.ToString(number, nfi),8}"
// The example displays the following output:
//       -32768    -->    ~32768
//       32767     -->     32767

Dim numbers() As Short = { Int16.MinValue, Int16.MaxValue}
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

For Each number As Short In numbers
   Console.WriteLine("{0,-8}  -->  {1,8}", _
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                     Convert.ToString(number, nfi))
Next
' The example displays the following output:
'       -32768    -->    ~32768
'       32767     -->     32767

Remarques

Cette implémentation est identique à Int16.ToString(IFormatProvider).

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(long value, IFormatProvider ^ provider);

public static string ToString (long value, IFormatProvider provider);

public static string ToString (long value, IFormatProvider? provider);

static member ToString : int64 * IFormatProvider -> string

Public Shared Function ToString (value As Long, provider As IFormatProvider) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant définit une classe personnalisée NumberFormatInfo qui définit son signe négatif comme chaîne « ~ » et son signe positif comme chaîne « ! ». Il appelle ensuite la ToString(Int64, IFormatProvider) méthode pour convertir chaque élément d’un tableau d’entiers longs en sa représentation sous forme de chaîne équivalente. La conversion utilise la culture invariante ainsi que l’objet personnalisé NumberFormatInfo .

long[] numbers = { ((long) Int32.MinValue) * 2, ((long) Int32.MaxValue) * 2};
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

foreach (long number in numbers)
   Console.WriteLine("{0,-12}  -->  {1,12}",
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                     Convert.ToString(number, nfi));
// The example displays the following output:
//       -4294967296  -->  ~4294967296
//       4294967294  -->  4294967294

let numbers = [| (int64 Int32.MinValue) * 2L; (int64 Int32.MaxValue) * 2L |]
let nfi = NumberFormatInfo()
nfi.NegativeSign <- "~"
nfi.PositiveSign <- "!"

for number in numbers do
    printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture),-12}  -->  {Convert.ToString(number, nfi),12}"
// The example displays the following output:
//       -4294967296  -->  ~4294967296
//       4294967294  -->  4294967294

Dim numbers() As Long = { CLng(Int32.MinValue) * 2, CLng(Int32.MaxValue) * 2 }
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

For Each number As Long In numbers
   Console.WriteLine("{0,-12}  -->  {1,12}", _
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                     Convert.ToString(number, nfi))
Next
' The example displays the following output:
'       -4294967296  -->  ~4294967296
'       4294967294   -->  4294967294

Remarques

Cette implémentation est identique à Int64.ToString(IFormatProvider).

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(float value, IFormatProvider ^ provider);

public static string ToString (float value, IFormatProvider provider);

public static string ToString (float value, IFormatProvider? provider);

static member ToString : single * IFormatProvider -> string

Public Shared Function ToString (value As Single, provider As IFormatProvider) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit chaque élément d’un tableau de valeurs en sa représentation sous forme de Single chaîne équivalente dans quatre cultures différentes.

// Define an array of numbers to display.
float[] numbers = { -1.5345e16f, -123.4321f, 19092.123f, 1.1734231911290e16f };
// Define the culture names used to display them.
string[] cultureNames = { "en-US", "fr-FR", "ja-JP", "ru-RU" };

foreach (float number in numbers)
{
   Console.WriteLine("{0}:", Convert.ToString(number,
                             System.Globalization.CultureInfo.InvariantCulture));
   foreach (string cultureName in cultureNames)
   {
      System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
      Console.WriteLine("   {0}: {1,20}",
                        culture.Name, Convert.ToString(number, culture));
   }
   Console.WriteLine();
}
// The example displays the following output:
//    -1.5345E+16:
//       en-US:          -1.5345E+16
//       fr-FR:          -1,5345E+16
//       ja-JP:          -1.5345E+16
//       ru-RU:          -1,5345E+16
//
//    -123.4321:
//       en-US:            -123.4321
//       fr-FR:            -123,4321
//       ja-JP:            -123.4321
//       ru-RU:            -123,4321
//
//    19092.123:
//       en-US:            19092.123
//       fr-FR:            19092,123
//       ja-JP:            19092.123
//       ru-RU:            19092,123
//
//    1.173423191129E+16:
//       en-US:   1.173423191129E+16
//       fr-FR:   1,173423191129E+16
//       ja-JP:   1.173423191129E+16
//       ru-RU:   1,173423191129E+16

// Define an array of numbers to display.
let numbers = [| -1.5345e16f; -123.4321f; 19092.123f; 1.1734231911290e16f |]
// Define the culture names used to display them.
let cultureNames = [| "en-US"; "fr-FR"; "ja-JP"; "ru-RU" |]

for number in numbers do
    printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture)}:"
    for cultureName in cultureNames do
        let culture = CultureInfo cultureName
        printfn $"   {culture.Name}: {Convert.ToString(number, culture),20}"
    printfn ""
// The example displays the following output:
//    -1.5345E+16:
//       en-US:          -1.5345E+16
//       fr-FR:          -1,5345E+16
//       ja-JP:          -1.5345E+16
//       ru-RU:          -1,5345E+16
//
//    -123.4321:
//       en-US:            -123.4321
//       fr-FR:            -123,4321
//       ja-JP:            -123.4321
//       ru-RU:            -123,4321
//
//    19092.123:
//       en-US:            19092.123
//       fr-FR:            19092,123
//       ja-JP:            19092.123
//       ru-RU:            19092,123
//
//    1.173423191129E+16:
//       en-US:   1.173423191129E+16
//       fr-FR:   1,173423191129E+16
//       ja-JP:   1.173423191129E+16
//       ru-RU:   1,173423191129E+16

' Define an array of numbers to display.
Dim numbers() As Single = { -1.5345e16, -123.4321, 19092.123, _
                            1.1734231911290e16 }
' Define the culture names used to display them.
Dim cultureNames() As String = { "en-US", "fr-FR", "ja-JP", "ru-RU" }

For Each number As Single In numbers
   Console.WriteLine("{0}:", Convert.ToString(number, _
                             System.Globalization.CultureInfo.InvariantCulture))
   For Each cultureName As String In cultureNames
      Dim culture As New System.Globalization.CultureInfo(cultureName)
      Console.WriteLine("   {0}: {1,20}", _
                        culture.Name, Convert.ToString(number, culture))
   Next
   Console.WriteLine()
Next   
' The example displays the following output:
'    -1.5345E+16:
'       en-US:          -1.5345E+16
'       fr-FR:          -1,5345E+16
'       ja-JP:          -1.5345E+16
'       ru-RU:          -1,5345E+16
'    
'    -123.4321:
'       en-US:            -123.4321
'       fr-FR:            -123,4321
'       ja-JP:            -123.4321
'       ru-RU:            -123,4321
'    
'    19092.123:
'       en-US:            19092.123
'       fr-FR:            19092,123
'       ja-JP:            19092.123
'       ru-RU:            19092,123
'    
'    1.173423191129E+16:
'       en-US:   1.173423191129E+16
'       fr-FR:   1,173423191129E+16
'       ja-JP:   1.173423191129E+16
'       ru-RU:   1,173423191129E+16

Remarques

Cette implémentation est identique à Single.ToString(IFormatProvider).

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::Object ^ value, IFormatProvider ^ provider);

public static string ToString (object value, IFormatProvider provider);

public static string? ToString (object? value, IFormatProvider? provider);

static member ToString : obj * IFormatProvider -> string

Public Shared Function ToString (value As Object, provider As IFormatProvider) As String

Paramètres

Retours

La représentation sous forme de chaîne de value, ou Empty si la valeur value est un objet dont la valeur est null. Si value est null, la méthode retourne null.

Exemples

L’exemple suivant définit une Temperature classe qui remplace la Object.ToString méthode mais n’implémente pas l’interface IConvertible . L’exemple montre comment les appels à la Convert.ToString(Object, IFormatProvider) méthode, à leur tour, appellent la Temperature.ToString méthode .

using System;

public class Temperature
{
   private decimal m_Temp;

   public Temperature(decimal temperature)
   {
      this.m_Temp = temperature;
   }

   public decimal Celsius
   {
      get { return this.m_Temp; }
   }

   public decimal Kelvin
   {
      get { return this.m_Temp + 273.15m; }
   }

   public decimal Fahrenheit
   {
      get { return Math.Round((decimal) (this.m_Temp * 9 / 5 + 32), 2); }
   }

   public override string ToString()
   {
      return m_Temp.ToString("N2") + " °C";
   }
}

public class Example
{
   public static void Main()
   {
      Temperature cold = new Temperature(-40);
      Temperature freezing = new Temperature(0);
      Temperature boiling = new Temperature(100);

      Console.WriteLine(Convert.ToString(cold, null));
      Console.WriteLine(Convert.ToString(freezing, null));
      Console.WriteLine(Convert.ToString(boiling, null));
   }
}
// The example dosplays the following output:
//       -40.00 °C
//       0.00 °C
//       100.00 °C

open System

type Temperature(temperature: decimal) =
    member _.Celsius =
        temperature

    member _.Kelvin =
        temperature + 273.15m

    member _.Fahrenheit =
        Math.Round(temperature * 9m / 5m + 32m |> decimal, 2)

    override _.ToString() =
        temperature.ToString("N2") + " °C"

let cold = Temperature -40
let freezing = Temperature 0
let boiling = Temperature 100

printfn $"{Convert.ToString(cold, null)}"
printfn $"{Convert.ToString(freezing, null)}"
printfn $"{Convert.ToString(boiling, null)}"
// The example dosplays the following output:
//       -40.00 °C
//       0.00 °C
//       100.00 °C

Public Class Temperature 
   Private m_Temp As Decimal

   Public Sub New(temperature As Decimal)
      Me.m_Temp = temperature
   End Sub
   
   Public ReadOnly Property Celsius() As Decimal
      Get
         Return Me.m_Temp
      End Get   
   End Property
   
   Public ReadOnly Property Kelvin() As Decimal
      Get
         Return Me.m_Temp + 273.15d   
      End Get
   End Property
   
   Public ReadOnly Property Fahrenheit() As Decimal
      Get
         Return Math.Round(CDec(Me.m_Temp * 9 / 5 + 32), 2)
      End Get      
   End Property
   
   Public Overrides Function ToString() As String
      Return m_Temp.ToString("N2") & " °C"
   End Function
End Class

Module Example
   Public Sub Main()
      Dim cold As New Temperature(-40)
      Dim freezing As New Temperature(0)
      Dim boiling As New Temperature(100)
      
      Console.WriteLine(Convert.ToString(cold, Nothing))
      Console.WriteLine(Convert.ToString(freezing, Nothing))
      Console.WriteLine(Convert.ToString(boiling, Nothing))
   End Sub
End Module
' The example displays the following output:
'       -40.00 °C
'       0.00 °C
'       100.00 °C

L’exemple suivant définit une Temperature classe qui implémente l’interface IFormattable , mais qui n’implémente pas l’interface IConvertible . Son IFormattable.ToString implémentation représente la Temperature valeur en Celsius, Fahrenheit ou Kelvin, selon la chaîne de format. L’exemple définit également une TemperatureProvider classe qui implémente IFormatProvider et fournit une chaîne de format générée de manière aléatoire qui est utilisée par l’implémentation IFormattable de la Temperature classe .

using System;

public class Temperature : IFormattable
{
   private decimal m_Temp;

   public Temperature(decimal temperature)
   {
      this.m_Temp = temperature;
   }

   public decimal Celsius
   { get { return this.m_Temp; } }

   public decimal Kelvin
   { get { return this.m_Temp + 273.15m; } }

   public decimal Fahrenheit
   {  get { return Math.Round(this.m_Temp * 9m / 5m + 32m, 2); } }

   public override String ToString()
   {
      return ToString("G", null);
   }

   public String ToString(String fmt, IFormatProvider provider)
   {
      TemperatureProvider formatter = null;
      if (provider != null)
         formatter = provider.GetFormat(typeof(TemperatureProvider))
                                       as TemperatureProvider;

      if (String.IsNullOrWhiteSpace(fmt)) {
         if (formatter != null)
            fmt = formatter.Format;
         else
            fmt = "G";
      }

      switch (fmt.ToUpper()) {
         case "G":
         case "C":
            return m_Temp.ToString("N2") + " °C";
         case "F":
            return Fahrenheit.ToString("N2") + " °F";
         case "K":
            return Kelvin.ToString("N2") + " K";
         default:
            throw new FormatException(String.Format("'{0}' is not a valid format specifier.", fmt));
      }
   }
}

public class TemperatureProvider : IFormatProvider
{
   private String[] fmtStrings = { "C", "G", "F", "K" };
   private Random rnd = new Random();

   public Object GetFormat(Type formatType)
   {
      return this;
   }

   public String Format
   { get { return fmtStrings[rnd.Next(0, fmtStrings.Length)]; } }
}

public class Example
{
   public static void Main()
   {
      Temperature cold = new Temperature (-40);
      Temperature freezing = new Temperature (0);
      Temperature boiling = new Temperature (100);

      TemperatureProvider tp = new TemperatureProvider();

      Console.WriteLine(Convert.ToString(cold, tp));
      Console.WriteLine(Convert.ToString(freezing, tp));
      Console.WriteLine(Convert.ToString(boiling, tp));
   }
}
// The example displays output like the following:
//       -40.00 °C
//       273.15 K
//       100.00 °C

open System

[<AllowNullLiteral>]
type TemperatureProvider() =
    let fmtStrings = [| "C"; "G"; "F"; "K" |]
    let rnd = Random()

    member _.Format =
        fmtStrings[rnd.Next(0, fmtStrings.Length)]

    interface IFormatProvider with
        member this.GetFormat(formatType: Type) =
            this

type Temperature(temperature: decimal) =
    member _.Celsius =
        temperature
    member _.Kelvin =
        temperature + 273.15m

    member _.Fahrenheit =
        Math.Round(temperature * 9m / 5m + 32m, 2)

    override this.ToString() =
        this.ToString("G", null)

    member this.ToString(fmt: string, provider: IFormatProvider) =
        let formatter =
            match provider with
            | null -> null
            | _ ->
                match provider.GetFormat typeof<TemperatureProvider> with
                | :? TemperatureProvider as x -> x
                | _ -> null 

        let fmt = 
            if String.IsNullOrWhiteSpace fmt then
                if formatter <> null then
                    formatter.Format
                else
                    "G"
            else fmt

        match fmt.ToUpper() with
        | "G"
        | "C" ->
            $"{temperature:N2} °C"
        | "F" ->
            $"{this.Fahrenheit:N2}  °F"
        | "K" ->
            $"{this.Kelvin:N2} K"
        | _ ->
            raise (FormatException $"'{fmt}' is not a valid format specifier.")

let cold = Temperature -40
let freezing = Temperature 0
let boiling = Temperature 100

let tp = TemperatureProvider()

printfn $"{Convert.ToString(cold, tp)}"
printfn $"{Convert.ToString(freezing, tp)}"
printfn $"{Convert.ToString(boiling, tp)}"
// The example displays output like the following:
//       -40.00 °C
//       273.15 K
//       100.00 °C

Public Class Temperature : Implements IFormattable 
   Private m_Temp As Decimal 

   Public Sub New(temperature As Decimal)
      Me.m_Temp = temperature
   End Sub 

   Public ReadOnly Property Celsius As Decimal 
      Get 
         Return Me.m_Temp
      End Get    
   End Property 

   Public ReadOnly Property Kelvin As Decimal 
      Get 
         Return Me.m_Temp + 273.15d   
      End Get 
   End Property 

   Public ReadOnly Property Fahrenheit As Decimal 
      Get 
         Return Math.Round(CDec(Me.m_Temp * 9 / 5 + 32), 2)
      End Get       
   End Property 

   Public Overrides Function ToString() As String 
      Return ToString("G", Nothing) 
   End Function 
   
   Public Overloads Function ToString(fmt As String, 
                                      provider As IFormatProvider) As String _
                             Implements IFormattable.ToString
      Dim formatter As TemperatureProvider = Nothing
      If provider IsNot Nothing Then formatter = TryCast(provider.GetFormat(GetType(TemperatureProvider)),
                                                         TemperatureProvider)

      If String.IsNullOrWhiteSpace(fmt) Then
         If formatter IsNot Nothing Then
            fmt = formatter.Format
         Else
            fmt = "G"
         End If
      End If

      Select Case fmt.ToUpper()
         Case "G", "C"
            Return m_Temp.ToString("N2") & " °C" 
         Case "F"
            Return Fahrenheit.ToString("N2") + " °F"
         Case "K"
            Return Kelvin.ToString("N2") + " K"
         Case Else
            Throw New FormatException(String.Format("'{0}' is not a valid format specifier.", fmt))
      End Select
   End Function                             
End Class 

Public Class TemperatureProvider : Implements IFormatProvider
   Private fmtStrings() As String = { "C", "G", "F", "K" }
   Private rnd As New Random()
   
   Public Function GetFormat(formatType As Type) As Object _
                   Implements IFormatProvider.GetFormat 
      Return Me 
   End Function
   
   Public ReadOnly Property Format As String
      Get
         Return fmtStrings(rnd.Next(0, fmtStrings.Length))
      End Get
   End Property
End Class

Module Example
   Public Sub Main()
      Dim cold As New Temperature(-40)
      Dim freezing As New Temperature(0)
      Dim boiling As New Temperature(100)

      Dim tp As New TemperatureProvider()
      
      Console.WriteLine(Convert.ToString(cold, tp))
      Console.WriteLine(Convert.ToString(freezing, tp))
      Console.WriteLine(Convert.ToString(boiling, tp))
   End Sub 
End Module 
' The example displays output like the following:
'       -40.00 °C
'       273.15 K
'       100.00 °C

Remarques

Si le value paramètre implémente l’interface IConvertible , la méthode appelle l’implémentation IConvertible.ToString(IFormatProvider) de value. Sinon, si le value paramètre implémente l’interface IFormattable , la méthode appelle son IFormattable.ToString(String, IFormatProvider) implémentation. Si value n’implémente aucune interface, la méthode appelle la value méthode du ToString() paramètre et le provider paramètre est ignoré.

Le provider paramètre est utilisé si le value paramètre implémente l’interface IConvertible ou IFormattable . L’utilisation la plus courante du provider paramètre consiste à spécifier des informations spécifiques à la culture utilisées dans la conversion de value. Par exemple, si le value paramètre est un nombre décimal négatif, le paramètre peut fournir des informations spécifiques à la provider culture sur la notation utilisée pour le signe négatif et le séparateur décimal. Le deuxième exemple de la section suivante illustre un fournisseur de formats qui ne fournit pas d’informations de mise en forme sensibles à la culture.

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::SByte value, IFormatProvider ^ provider);

[System.CLSCompliant(false)]
public static string ToString (sbyte value, IFormatProvider provider);

[System.CLSCompliant(false)]
public static string ToString (sbyte value, IFormatProvider? provider);

[<System.CLSCompliant(false)>]
static member ToString : sbyte * IFormatProvider -> string

Public Shared Function ToString (value As SByte, provider As IFormatProvider) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Attributs

CLSCompliantAttribute

Exemples

L’exemple suivant définit une classe personnalisée NumberFormatInfo qui définit son signe négatif comme chaîne « ~ » et son signe positif comme chaîne « ! ». Il appelle ensuite la Convert.ToString(SByte, IFormatProvider) méthode pour convertir chaque élément du tableau d’octets signé en sa représentation sous forme de chaîne équivalente. La conversion utilise la culture invariante ainsi que l’objet personnalisé NumberFormatInfo .

sbyte[] numbers = { SByte.MinValue, -12, 17, SByte.MaxValue};
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";
foreach (sbyte number in numbers)
   Console.WriteLine(Convert.ToString(number, nfi));
// The example displays the following output:
//       ~128
//       ~12
//       17
//       127

let numbers = [| SByte.MinValue; -12y; 17y; SByte.MaxValue |]
let nfi = NumberFormatInfo()
nfi.NegativeSign <- "~"
nfi.PositiveSign <- "!"
for number in numbers do
    printfn $"{Convert.ToString(number, nfi)}"
// The example displays the following output:
//       ~128
//       ~12
//       17
//       127

Dim numbers() As SByte = { SByte.MinValue, -12, 17, SByte.MaxValue}
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"
For Each number As SByte In numbers
   Console.WriteLine(Convert.ToString(number, nfi))
Next
' The example displays the following output:
'       ~128
'       ~12
'       17
'       127

Remarques

Cette implémentation est identique à SByte.ToString(IFormatProvider).

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::String ^ value, IFormatProvider ^ provider);

public static string? ToString (string? value, IFormatProvider? provider);

public static string ToString (string value, IFormatProvider provider);

static member ToString : string * IFormatProvider -> string

Public Shared Function ToString (value As String, provider As IFormatProvider) As String

Paramètres

Retours

value est retourné sans modification.

Exemples

L’exemple suivant appelle la ToString méthode avec un String paramètre . La méthode retourne le non modifié String sans référencer l’objet IFormatProvider .

// Example of Convert::ToString( non-numeric types, IFormatProvider ).
using namespace System;
using namespace System::Globalization;

#define null (Object^)0

// An instance of this class can be passed to methods that require 
// an IFormatProvider.
ref class DummyProvider: public IFormatProvider
{
public:

   // Normally, GetFormat returns an object of the requested type
   // (usually itself) if it is able; otherwise, it returns Nothing. 
   virtual Object^ GetFormat( Type^ argType )
   {
      // Here, the type of argType is displayed, and GetFormat
      // always returns Nothing.
      Console::Write( "{0,-40}", argType->ToString() );
      return null;
   }
};

int main()
{
   // Create an instance of the IFormatProvider.
   DummyProvider^ provider = gcnew DummyProvider;
   String^ converted;

   // Convert these values using DummyProvider.
   int Int32A = -252645135;
   double DoubleA = 61680.3855;
   Object^ ObjDouble =  -98765.4321;
   DateTime DayTimeA = DateTime(2001,9,11,13,45,0);
   bool BoolA = true;
   String^ StringA = "Qwerty";
   Char CharA = '$';
   TimeSpan TSpanA = TimeSpan(0,18,0);
   Object^ ObjOther = static_cast<Object^>(provider);
   Console::WriteLine( "This example of "
   "Convert::ToString( non-numeric, IFormatProvider* ) \n"
   "generates the following output. The provider type, "
   "argument type, \nand argument value are displayed." );
   Console::WriteLine( "\nNote: The IFormatProvider object is "
   "not called for Boolean, String, \nChar, TimeSpan, "
   "and non-numeric Object." );

   // The format provider is called for these conversions.
   Console::WriteLine();
   converted = Convert::ToString( Int32A, provider );
   Console::WriteLine( "int      {0}", converted );
   converted = Convert::ToString( DoubleA, provider );
   Console::WriteLine( "double   {0}", converted );
   converted = Convert::ToString( ObjDouble, provider );
   Console::WriteLine( "Object   {0}", converted );
   converted = Convert::ToString( DayTimeA, provider );
   Console::WriteLine( "DateTime {0}", converted );

   // The format provider is not called for these conversions.
   Console::WriteLine();
   converted = Convert::ToString( BoolA, provider );
   Console::WriteLine( "bool     {0}", converted );
   converted = Convert::ToString( StringA, provider );
   Console::WriteLine( "String   {0}", converted );
   converted = Convert::ToString( CharA, provider );
   Console::WriteLine( "Char     {0}", converted );
   converted = Convert::ToString( TSpanA, provider );
   Console::WriteLine( "TimeSpan {0}", converted );
   converted = Convert::ToString( ObjOther, provider );
   Console::WriteLine( "Object   {0}", converted );
}

/*
This example of Convert::ToString( non-numeric, IFormatProvider* )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   Object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
String   Qwerty
Char     $
TimeSpan 00:18:00
Object   DummyProvider
*/

// Example of Convert.ToString( non-numeric types, IFormatProvider ).
using System;
using System.Globalization;

// An instance of this class can be passed to methods that require
// an IFormatProvider.
public class DummyProvider : IFormatProvider
{
    // Normally, GetFormat returns an object of the requested type
    // (usually itself) if it is able; otherwise, it returns Nothing.
    public object GetFormat( Type argType )
    {
        // Here, the type of argType is displayed, and GetFormat
        // always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) );
        return null;
    }
}

class ConvertNonNumericProviderDemo
{
    static void Main( )
    {
        // Create an instance of the IFormatProvider.
        DummyProvider provider = new DummyProvider( );
        string converted;

        // Convert these values using DummyProvider.
        int      Int32A     = -252645135;
        double   DoubleA    = 61680.3855;
        object   ObjDouble  = (object)( -98765.4321 );
        DateTime DayTimeA   = new DateTime( 2001, 9, 11, 13, 45, 0 );

        bool     BoolA      = true;
        string   StringA    = "Qwerty";
        char     CharA      = '$';
        TimeSpan TSpanA     = new TimeSpan( 0, 18, 0 );
        object   ObjOther   = (object)provider;

        Console.WriteLine( "This example of " +
            "Convert.ToString( non-numeric, IFormatProvider ) \n" +
            "generates the following output. The provider type, " +
            "argument type, \nand argument value are displayed." );
        Console.WriteLine( "\nNote: The IFormatProvider object is " +
            "not called for Boolean, String, \nChar, TimeSpan, " +
            "and non-numeric Object." );

        // The format provider is called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( Int32A, provider );
        Console.WriteLine( "int      {0}", converted );
        converted = Convert.ToString( DoubleA, provider );
        Console.WriteLine( "double   {0}", converted );
        converted = Convert.ToString( ObjDouble, provider );
        Console.WriteLine( "object   {0}", converted );
        converted = Convert.ToString( DayTimeA, provider );
        Console.WriteLine( "DateTime {0}", converted );

        // The format provider is not called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( BoolA, provider );
        Console.WriteLine( "bool     {0}", converted );
        converted = Convert.ToString( StringA, provider );
        Console.WriteLine( "string   {0}", converted );
        converted = Convert.ToString( CharA, provider );
        Console.WriteLine( "char     {0}", converted );
        converted = Convert.ToString( TSpanA, provider );
        Console.WriteLine( "TimeSpan {0}", converted );
        converted = Convert.ToString( ObjOther, provider );
        Console.WriteLine( "object   {0}", converted );
    }
}

/*
This example of Convert.ToString( non-numeric, IFormatProvider )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
string   Qwerty
char     $
TimeSpan 00:18:00
object   DummyProvider

*/

// Example of Convert.ToString(non-numeric types, IFormatProvider).
open System
open System.Globalization

// Create an instance of the IFormatProvider with an object expression.
let provider =
    { new IFormatProvider with
        // Normally, GetFormat returns an object of the requested type
        // (usually itself) if it is able; otherwise, it returns Nothing.
        member _.GetFormat(argType: Type) =
            // Here, the type of argType is displayed, and GetFormat
            // always returns Nothing.
            printf $"{argType,-40}"
            null 
    }

// Convert these values using DummyProvider.
let Int32A     = -252645135
let DoubleA    = 61680.3855
let ObjDouble  = -98765.4321 :> obj
let DayTimeA   = DateTime(2001, 9, 11, 13, 45, 0)

let BoolA      = true
let StringA    = "Qwerty"
let CharA      = '$'
let TSpanA     = TimeSpan(0, 18, 0)
let ObjOther   = provider :> obj

[<EntryPoint>]
let main _ =
    printfn
        """This example of Convert.ToString(non-numeric, IFormatProvider) 
generates the following output. The provider type, argument type, 
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String, 
Char, TimeSpan, and non-numeric Object."""

    // The format provider is called for these conversions.
    printfn ""
    let converted = Convert.ToString(Int32A, provider)
    printfn $"int      {converted}"
    let converted = Convert.ToString(DoubleA, provider)
    printfn $"double   {converted}"
    let converted = Convert.ToString(ObjDouble, provider)
    printfn $"object   {converted}"
    let converted = Convert.ToString(DayTimeA, provider)
    printfn $"DateTime {converted}"

    // The format provider is not called for these conversions.
    printfn ""
    let converted = Convert.ToString(BoolA, provider)
    printfn $"bool     {converted}"
    let converted = Convert.ToString(StringA, provider)
    printfn $"string   {converted}"
    let converted = Convert.ToString(CharA, provider)
    printfn $"char     {converted}"
    let converted = Convert.ToString(TSpanA, provider)
    printfn $"TimeSpan {converted}"
    let converted = Convert.ToString(ObjOther, provider)
    printfn $"object   {converted}"

    0

// This example of Convert.ToString(non-numeric, IFormatProvider)
// generates the following output. The provider type, argument type,
// and argument value are displayed.
//
// Note: The IFormatProvider object is not called for Boolean, String,
// Char, TimeSpan, and non-numeric Object.
//
// System.Globalization.NumberFormatInfo   int      -252645135
// System.Globalization.NumberFormatInfo   double   61680.3855
// System.Globalization.NumberFormatInfo   object   -98765.4321
// System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
//
// bool     True
// string   Qwerty
// char     $
// TimeSpan 00:18:00
// object   DummyProvider

' Example of Convert.ToString( non-numeric types, IFormatProvider ).
Imports System.Globalization

' An instance of this class can be passed to methods that require 
' an IFormatProvider.
Public Class DummyProvider
    Implements IFormatProvider

    ' Normally, GetFormat returns an object of the requested type
    ' (usually itself) if it is able; otherwise, it returns Nothing. 
    Public Function GetFormat( argType As Type ) As Object _
        Implements IFormatProvider.GetFormat

        ' Here, the type of argType is displayed, and GetFormat
        ' always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) )
        Return Nothing

    End Function 
End Class

Module ConvertNonNumericProviderDemo

    Sub Main( )

        ' Create an instance of the IFormatProvider.
        Dim provider    As New DummyProvider( )
        Dim converted   As String

        ' Convert these values using DummyProvider.
        Dim Int32A      As Integer  = -252645135   
        Dim DoubleA     As Double   = 61680.3855
        Dim ObjDouble   As Object   = CType( -98765.4321, Object )
        Dim DayTimeA    As DateTime = _
                            new DateTime( 2001, 9, 11, 13, 45, 0 )

        Dim BoolA       As Boolean  = True
        Dim StringA     As String   = "Qwerty"
        Dim CharA       As Char     = "$"c
        Dim TSpanA      As TimeSpan = New TimeSpan( 0, 18, 0 )
        Dim ObjOther    As Object   = CType( provider, Object )

        Console.WriteLine( "This example of " & _
            "Convert.ToString( non-numeric, IFormatProvider ) " & _
            vbCrLf & "generates the following output. The " & _
            "provider type, argument type, " & vbCrLf & "and " & _
            "argument value are displayed." )
        Console.WriteLine( vbCrLf & _
            "Note: The IFormatProvider object is not called for " & _
            "Boolean, String, " & vbCrLf & "Char, TimeSpan, " & _
            "and non-numeric Object." )

        ' The format provider is called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( Int32A, provider )
        Console.WriteLine( "Int32    {0}", converted )
        converted =  Convert.ToString( DoubleA, provider )
        Console.WriteLine( "Double   {0}", converted )
        converted =  Convert.ToString( ObjDouble, provider )
        Console.WriteLine( "Object   {0}", converted )
        converted =  Convert.ToString( DayTimeA, provider )
        Console.WriteLine( "DateTime {0}", converted )

        ' The format provider is not called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( BoolA, provider )
        Console.WriteLine( "Boolean  {0}", converted )
        converted =  Convert.ToString( StringA, provider )
        Console.WriteLine( "String   {0}", converted )
        converted =  Convert.ToString( CharA, provider )
        Console.WriteLine( "Char     {0}", converted )
        converted =  Convert.ToString( TSpanA, provider )
        Console.WriteLine( "TimeSpan {0}", converted )
        converted =  Convert.ToString( ObjOther, provider )
        Console.WriteLine( "Object   {0}", converted )

    End Sub
End Module

' This example of Convert.ToString( non-numeric, IFormatProvider )
' generates the following output. The provider type, argument type,
' and argument value are displayed.
'
' Note: The IFormatProvider object is not called for Boolean, String,
' Char, TimeSpan, and non-numeric Object.
' 
' System.Globalization.NumberFormatInfo   Int32    -252645135
' System.Globalization.NumberFormatInfo   Double   61680.3855
' System.Globalization.NumberFormatInfo   Object   -98765.4321
' System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
' 
' Boolean  True
' String   Qwerty
' Char     $
' TimeSpan 00:18:00
' Object   DummyProvider

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::UInt16 value, IFormatProvider ^ provider);

[System.CLSCompliant(false)]
public static string ToString (ushort value, IFormatProvider provider);

[System.CLSCompliant(false)]
public static string ToString (ushort value, IFormatProvider? provider);

[<System.CLSCompliant(false)>]
static member ToString : uint16 * IFormatProvider -> string

Public Shared Function ToString (value As UShort, provider As IFormatProvider) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Attributs

CLSCompliantAttribute

Exemples

L’exemple suivant définit une classe personnalisée NumberFormatInfo qui définit son signe négatif comme chaîne « ~ » et son signe positif comme chaîne « ! ». Il appelle ensuite la ToString(UInt16, IFormatProvider) méthode pour convertir une valeur entière non signée 16 bits en sa représentation sous forme de chaîne équivalente. La conversion utilise à la fois la culture invariante et l’objet personnalisé NumberFormatInfo . La sortie indique que ces informations de mise en forme ne sont pas utilisées, car par défaut, le spécificateur de format « G » n’inclut pas de signe positif avec des valeurs positives.

ushort number = UInt16.MaxValue;
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

Console.WriteLine("{0,-6}  -->  {1,6}",
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                  Convert.ToString(number, nfi));
// The example displays the following output:
//       65535   -->   65535

let number = UInt16.MaxValue
let nfi = NumberFormatInfo()
nfi.NegativeSign <- "~"
nfi.PositiveSign <- "!"

printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture),-6}  -->  {Convert.ToString(number, nfi),6}"
// The example displays the following output:
//       65535   -->   65535

Dim number As UShort = UInt16.MaxValue
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

Console.WriteLine("{0,-6}  -->  {1,6}", _
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                  Convert.ToString(number, nfi))
' The example displays the following output:
'       65535   -->   65535

Remarques

Cette implémentation est identique à UInt16.ToString(IFormatProvider).

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::UInt32 value, IFormatProvider ^ provider);

[System.CLSCompliant(false)]
public static string ToString (uint value, IFormatProvider provider);

[System.CLSCompliant(false)]
public static string ToString (uint value, IFormatProvider? provider);

[<System.CLSCompliant(false)>]
static member ToString : uint32 * IFormatProvider -> string

Public Shared Function ToString (value As UInteger, provider As IFormatProvider) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Attributs

CLSCompliantAttribute

Exemples

L’exemple suivant définit une classe personnalisée NumberFormatInfo qui définit son signe négatif comme chaîne « ~ » et son signe positif comme chaîne « ! ». Il appelle ensuite la ToString(UInt32, IFormatProvider) méthode pour convertir une valeur entière non signée en sa représentation sous forme de chaîne équivalente. La conversion utilise à la fois la culture invariante et l’objet personnalisé NumberFormatInfo . La sortie indique que ces informations de mise en forme ne sont pas utilisées, car par défaut, le spécificateur de format « G » n’inclut pas de signe positif avec des valeurs positives.

uint number = UInt32.MaxValue;
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

Console.WriteLine("{0,-8}  -->  {1,8}",
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                  Convert.ToString(number, nfi));
// The example displays the following output:
//       4294967295  -->  4294967295

let number = UInt32.MaxValue
let nfi = NumberFormatInfo()
nfi.NegativeSign <- "~"
nfi.PositiveSign <- "!"

printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture),-8}  -->  {Convert.ToString(number, nfi),8}"
// The example displays the following output:
//       4294967295  -->  4294967295

Dim number As UInteger = UInt32.MaxValue
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

Console.WriteLine("{0,-8}  -->  {1,8}", _
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                  Convert.ToString(number, nfi))
' The example displays the following output:
'       4294967295  -->  4294967295

Remarques

Cette implémentation est identique à UInt32.ToString(IFormatProvider).

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::UInt64 value, IFormatProvider ^ provider);

[System.CLSCompliant(false)]
public static string ToString (ulong value, IFormatProvider provider);

[System.CLSCompliant(false)]
public static string ToString (ulong value, IFormatProvider? provider);

[<System.CLSCompliant(false)>]
static member ToString : uint64 * IFormatProvider -> string

Public Shared Function ToString (value As ULong, provider As IFormatProvider) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Attributs

CLSCompliantAttribute

Exemples

L’exemple suivant définit une classe personnalisée NumberFormatInfo qui définit son signe négatif comme chaîne « ~ » et son signe positif comme chaîne « ! ». Il appelle ensuite la ToString(UInt64, IFormatProvider) méthode pour convertir une valeur entière longue non signée en sa représentation sous forme de chaîne équivalente. La conversion utilise à la fois la culture invariante et l’objet personnalisé NumberFormatInfo . La sortie indique que ces informations de mise en forme ne sont pas utilisées, car par défaut, le spécificateur de format « G » n’inclut pas de signe positif avec des valeurs positives.

ulong number = UInt64.MaxValue;
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

Console.WriteLine("{0,-12}  -->  {1,12}",
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                  Convert.ToString(number, nfi));
// The example displays the following output:
//    18446744073709551615  -->  18446744073709551615

let number = UInt64.MaxValue
let nfi = NumberFormatInfo()
nfi.NegativeSign <- "~"
nfi.PositiveSign <- "!"

printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture),-12}  -->  {Convert.ToString(number, nfi),12}"
// The example displays the following output:
//    18446744073709551615  -->  18446744073709551615

Dim number As ULong = UInt64.MaxValue
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

Console.WriteLine("{0,-12}  -->  {1,12}", _
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                  Convert.ToString(number, nfi))
' The example displays the following output:
'    18446744073709551615  -->  18446744073709551615

Remarques

Cette implémentation est identique à UInt64.ToString(IFormatProvider).

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(char value, IFormatProvider ^ provider);

public static string ToString (char value, IFormatProvider provider);

public static string ToString (char value, IFormatProvider? provider);

static member ToString : char * IFormatProvider -> string

Public Shared Function ToString (value As Char, provider As IFormatProvider) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit une Char valeur en une String avec la méthode, à l’aide ToString d’un IFormatProvider objet qui affiche le type du fournisseur de format pour lequel elle est appelée. L’exemple montre que l’objet IFormatProvider n’est pas référencé.

// Example of Convert::ToString( non-numeric types, IFormatProvider ).
using namespace System;
using namespace System::Globalization;

#define null (Object^)0

// An instance of this class can be passed to methods that require 
// an IFormatProvider.
ref class DummyProvider: public IFormatProvider
{
public:

   // Normally, GetFormat returns an object of the requested type
   // (usually itself) if it is able; otherwise, it returns Nothing. 
   virtual Object^ GetFormat( Type^ argType )
   {
      // Here, the type of argType is displayed, and GetFormat
      // always returns Nothing.
      Console::Write( "{0,-40}", argType->ToString() );
      return null;
   }
};

int main()
{
   // Create an instance of the IFormatProvider.
   DummyProvider^ provider = gcnew DummyProvider;
   String^ converted;

   // Convert these values using DummyProvider.
   int Int32A = -252645135;
   double DoubleA = 61680.3855;
   Object^ ObjDouble =  -98765.4321;
   DateTime DayTimeA = DateTime(2001,9,11,13,45,0);
   bool BoolA = true;
   String^ StringA = "Qwerty";
   Char CharA = '$';
   TimeSpan TSpanA = TimeSpan(0,18,0);
   Object^ ObjOther = static_cast<Object^>(provider);
   Console::WriteLine( "This example of "
   "Convert::ToString( non-numeric, IFormatProvider* ) \n"
   "generates the following output. The provider type, "
   "argument type, \nand argument value are displayed." );
   Console::WriteLine( "\nNote: The IFormatProvider object is "
   "not called for Boolean, String, \nChar, TimeSpan, "
   "and non-numeric Object." );

   // The format provider is called for these conversions.
   Console::WriteLine();
   converted = Convert::ToString( Int32A, provider );
   Console::WriteLine( "int      {0}", converted );
   converted = Convert::ToString( DoubleA, provider );
   Console::WriteLine( "double   {0}", converted );
   converted = Convert::ToString( ObjDouble, provider );
   Console::WriteLine( "Object   {0}", converted );
   converted = Convert::ToString( DayTimeA, provider );
   Console::WriteLine( "DateTime {0}", converted );

   // The format provider is not called for these conversions.
   Console::WriteLine();
   converted = Convert::ToString( BoolA, provider );
   Console::WriteLine( "bool     {0}", converted );
   converted = Convert::ToString( StringA, provider );
   Console::WriteLine( "String   {0}", converted );
   converted = Convert::ToString( CharA, provider );
   Console::WriteLine( "Char     {0}", converted );
   converted = Convert::ToString( TSpanA, provider );
   Console::WriteLine( "TimeSpan {0}", converted );
   converted = Convert::ToString( ObjOther, provider );
   Console::WriteLine( "Object   {0}", converted );
}

/*
This example of Convert::ToString( non-numeric, IFormatProvider* )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   Object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
String   Qwerty
Char     $
TimeSpan 00:18:00
Object   DummyProvider
*/

// Example of Convert.ToString( non-numeric types, IFormatProvider ).
using System;
using System.Globalization;

// An instance of this class can be passed to methods that require
// an IFormatProvider.
public class DummyProvider : IFormatProvider
{
    // Normally, GetFormat returns an object of the requested type
    // (usually itself) if it is able; otherwise, it returns Nothing.
    public object GetFormat( Type argType )
    {
        // Here, the type of argType is displayed, and GetFormat
        // always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) );
        return null;
    }
}

class ConvertNonNumericProviderDemo
{
    static void Main( )
    {
        // Create an instance of the IFormatProvider.
        DummyProvider provider = new DummyProvider( );
        string converted;

        // Convert these values using DummyProvider.
        int      Int32A     = -252645135;
        double   DoubleA    = 61680.3855;
        object   ObjDouble  = (object)( -98765.4321 );
        DateTime DayTimeA   = new DateTime( 2001, 9, 11, 13, 45, 0 );

        bool     BoolA      = true;
        string   StringA    = "Qwerty";
        char     CharA      = '$';
        TimeSpan TSpanA     = new TimeSpan( 0, 18, 0 );
        object   ObjOther   = (object)provider;

        Console.WriteLine( "This example of " +
            "Convert.ToString( non-numeric, IFormatProvider ) \n" +
            "generates the following output. The provider type, " +
            "argument type, \nand argument value are displayed." );
        Console.WriteLine( "\nNote: The IFormatProvider object is " +
            "not called for Boolean, String, \nChar, TimeSpan, " +
            "and non-numeric Object." );

        // The format provider is called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( Int32A, provider );
        Console.WriteLine( "int      {0}", converted );
        converted = Convert.ToString( DoubleA, provider );
        Console.WriteLine( "double   {0}", converted );
        converted = Convert.ToString( ObjDouble, provider );
        Console.WriteLine( "object   {0}", converted );
        converted = Convert.ToString( DayTimeA, provider );
        Console.WriteLine( "DateTime {0}", converted );

        // The format provider is not called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( BoolA, provider );
        Console.WriteLine( "bool     {0}", converted );
        converted = Convert.ToString( StringA, provider );
        Console.WriteLine( "string   {0}", converted );
        converted = Convert.ToString( CharA, provider );
        Console.WriteLine( "char     {0}", converted );
        converted = Convert.ToString( TSpanA, provider );
        Console.WriteLine( "TimeSpan {0}", converted );
        converted = Convert.ToString( ObjOther, provider );
        Console.WriteLine( "object   {0}", converted );
    }
}

/*
This example of Convert.ToString( non-numeric, IFormatProvider )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
string   Qwerty
char     $
TimeSpan 00:18:00
object   DummyProvider

*/

// Example of Convert.ToString(non-numeric types, IFormatProvider).
open System
open System.Globalization

// Create an instance of the IFormatProvider with an object expression.
let provider =
    { new IFormatProvider with
        // Normally, GetFormat returns an object of the requested type
        // (usually itself) if it is able; otherwise, it returns Nothing.
        member _.GetFormat(argType: Type) =
            // Here, the type of argType is displayed, and GetFormat
            // always returns Nothing.
            printf $"{argType,-40}"
            null 
    }

// Convert these values using DummyProvider.
let Int32A     = -252645135
let DoubleA    = 61680.3855
let ObjDouble  = -98765.4321 :> obj
let DayTimeA   = DateTime(2001, 9, 11, 13, 45, 0)

let BoolA      = true
let StringA    = "Qwerty"
let CharA      = '$'
let TSpanA     = TimeSpan(0, 18, 0)
let ObjOther   = provider :> obj

[<EntryPoint>]
let main _ =
    printfn
        """This example of Convert.ToString(non-numeric, IFormatProvider) 
generates the following output. The provider type, argument type, 
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String, 
Char, TimeSpan, and non-numeric Object."""

    // The format provider is called for these conversions.
    printfn ""
    let converted = Convert.ToString(Int32A, provider)
    printfn $"int      {converted}"
    let converted = Convert.ToString(DoubleA, provider)
    printfn $"double   {converted}"
    let converted = Convert.ToString(ObjDouble, provider)
    printfn $"object   {converted}"
    let converted = Convert.ToString(DayTimeA, provider)
    printfn $"DateTime {converted}"

    // The format provider is not called for these conversions.
    printfn ""
    let converted = Convert.ToString(BoolA, provider)
    printfn $"bool     {converted}"
    let converted = Convert.ToString(StringA, provider)
    printfn $"string   {converted}"
    let converted = Convert.ToString(CharA, provider)
    printfn $"char     {converted}"
    let converted = Convert.ToString(TSpanA, provider)
    printfn $"TimeSpan {converted}"
    let converted = Convert.ToString(ObjOther, provider)
    printfn $"object   {converted}"

    0

// This example of Convert.ToString(non-numeric, IFormatProvider)
// generates the following output. The provider type, argument type,
// and argument value are displayed.
//
// Note: The IFormatProvider object is not called for Boolean, String,
// Char, TimeSpan, and non-numeric Object.
//
// System.Globalization.NumberFormatInfo   int      -252645135
// System.Globalization.NumberFormatInfo   double   61680.3855
// System.Globalization.NumberFormatInfo   object   -98765.4321
// System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
//
// bool     True
// string   Qwerty
// char     $
// TimeSpan 00:18:00
// object   DummyProvider

' Example of Convert.ToString( non-numeric types, IFormatProvider ).
Imports System.Globalization

' An instance of this class can be passed to methods that require 
' an IFormatProvider.
Public Class DummyProvider
    Implements IFormatProvider

    ' Normally, GetFormat returns an object of the requested type
    ' (usually itself) if it is able; otherwise, it returns Nothing. 
    Public Function GetFormat( argType As Type ) As Object _
        Implements IFormatProvider.GetFormat

        ' Here, the type of argType is displayed, and GetFormat
        ' always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) )
        Return Nothing

    End Function 
End Class

Module ConvertNonNumericProviderDemo

    Sub Main( )

        ' Create an instance of the IFormatProvider.
        Dim provider    As New DummyProvider( )
        Dim converted   As String

        ' Convert these values using DummyProvider.
        Dim Int32A      As Integer  = -252645135   
        Dim DoubleA     As Double   = 61680.3855
        Dim ObjDouble   As Object   = CType( -98765.4321, Object )
        Dim DayTimeA    As DateTime = _
                            new DateTime( 2001, 9, 11, 13, 45, 0 )

        Dim BoolA       As Boolean  = True
        Dim StringA     As String   = "Qwerty"
        Dim CharA       As Char     = "$"c
        Dim TSpanA      As TimeSpan = New TimeSpan( 0, 18, 0 )
        Dim ObjOther    As Object   = CType( provider, Object )

        Console.WriteLine( "This example of " & _
            "Convert.ToString( non-numeric, IFormatProvider ) " & _
            vbCrLf & "generates the following output. The " & _
            "provider type, argument type, " & vbCrLf & "and " & _
            "argument value are displayed." )
        Console.WriteLine( vbCrLf & _
            "Note: The IFormatProvider object is not called for " & _
            "Boolean, String, " & vbCrLf & "Char, TimeSpan, " & _
            "and non-numeric Object." )

        ' The format provider is called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( Int32A, provider )
        Console.WriteLine( "Int32    {0}", converted )
        converted =  Convert.ToString( DoubleA, provider )
        Console.WriteLine( "Double   {0}", converted )
        converted =  Convert.ToString( ObjDouble, provider )
        Console.WriteLine( "Object   {0}", converted )
        converted =  Convert.ToString( DayTimeA, provider )
        Console.WriteLine( "DateTime {0}", converted )

        ' The format provider is not called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( BoolA, provider )
        Console.WriteLine( "Boolean  {0}", converted )
        converted =  Convert.ToString( StringA, provider )
        Console.WriteLine( "String   {0}", converted )
        converted =  Convert.ToString( CharA, provider )
        Console.WriteLine( "Char     {0}", converted )
        converted =  Convert.ToString( TSpanA, provider )
        Console.WriteLine( "TimeSpan {0}", converted )
        converted =  Convert.ToString( ObjOther, provider )
        Console.WriteLine( "Object   {0}", converted )

    End Sub
End Module

' This example of Convert.ToString( non-numeric, IFormatProvider )
' generates the following output. The provider type, argument type,
' and argument value are displayed.
'
' Note: The IFormatProvider object is not called for Boolean, String,
' Char, TimeSpan, and non-numeric Object.
' 
' System.Globalization.NumberFormatInfo   Int32    -252645135
' System.Globalization.NumberFormatInfo   Double   61680.3855
' System.Globalization.NumberFormatInfo   Object   -98765.4321
' System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
' 
' Boolean  True
' String   Qwerty
' Char     $
' TimeSpan 00:18:00
' Object   DummyProvider

Remarques

Cette implémentation est identique à Char.ToString(). Le paramètre provider est ignoré.

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(long value, int toBase);

public static string ToString (long value, int toBase);

static member ToString : int64 * int -> string

Public Shared Function ToString (value As Long, toBase As Integer) As String

Paramètres

Retours

Représentation sous forme de chaîne de value en base toBase.

Exceptions

Exemples

L’exemple suivant convertit chaque élément d’un tableau d’entiers longs en représentations de chaînes binaires, hexadécimales, décimales et hexadécimales équivalentes.

int[] bases = { 2, 8, 10, 16};
long[] numbers = { Int64.MinValue, -193275430, -13621, -18, 12,
                   1914206117, Int64.MaxValue };

foreach (int baseValue in bases)
{
   Console.WriteLine("Base {0} conversion:", baseValue);
   foreach (long number in numbers)
   {
      Console.WriteLine("   {0,-23}  -->  0x{1}",
                        number, Convert.ToString(number, baseValue));
   }
}
// The example displays the following output:
//    Base 2 conversion:
//       -9223372036854775808     -->  0x1000000000000000000000000000000000000000000000000000000000000000
//       -193275430               -->  0x1111111111111111111111111111111111110100011110101101100111011010
//       -13621                   -->  0x1111111111111111111111111111111111111111111111111100101011001011
//       -18                      -->  0x1111111111111111111111111111111111111111111111111111111111101110
//       12                       -->  0x1100
//       1914206117               -->  0x1110010000110000111011110100101
//       9223372036854775807      -->  0x111111111111111111111111111111111111111111111111111111111111111
//    Base 8 conversion:
//       -9223372036854775808     -->  0x1000000000000000000000
//       -193275430               -->  0x1777777777776436554732
//       -13621                   -->  0x1777777777777777745313
//       -18                      -->  0x1777777777777777777756
//       12                       -->  0x14
//       1914206117               -->  0x16206073645
//       9223372036854775807      -->  0x777777777777777777777
//    Base 10 conversion:
//       -9223372036854775808     -->  0x-9223372036854775808
//       -193275430               -->  0x-193275430
//       -13621                   -->  0x-13621
//       -18                      -->  0x-18
//       12                       -->  0x12
//       1914206117               -->  0x1914206117
//       9223372036854775807      -->  0x9223372036854775807
//    Base 16 conversion:
//       -9223372036854775808     -->  0x8000000000000000
//       -193275430               -->  0xfffffffff47ad9da
//       -13621                   -->  0xffffffffffffcacb
//       -18                      -->  0xffffffffffffffee
//       12                       -->  0xc
//       1914206117               -->  0x721877a5
//       9223372036854775807      -->  0x7fffffffffffffff

let bases = [| 2; 8; 10; 16 |]
let numbers =
    [| Int64.MinValue; -193275430; -13621; -18; 12; 1914206117; Int64.MaxValue |]

for baseValue in bases do
    printfn $"Base {baseValue} conversion:"
    for number in numbers do
        printfn $"   {number,-23}  -->  0x{Convert.ToString(number, baseValue)}"
// The example displays the following output:
//    Base 2 conversion:
//       -9223372036854775808     -->  0x1000000000000000000000000000000000000000000000000000000000000000
//       -193275430               -->  0x1111111111111111111111111111111111110100011110101101100111011010
//       -13621                   -->  0x1111111111111111111111111111111111111111111111111100101011001011
//       -18                      -->  0x1111111111111111111111111111111111111111111111111111111111101110
//       12                       -->  0x1100
//       1914206117               -->  0x1110010000110000111011110100101
//       9223372036854775807      -->  0x111111111111111111111111111111111111111111111111111111111111111
//    Base 8 conversion:
//       -9223372036854775808     -->  0x1000000000000000000000
//       -193275430               -->  0x1777777777776436554732
//       -13621                   -->  0x1777777777777777745313
//       -18                      -->  0x1777777777777777777756
//       12                       -->  0x14
//       1914206117               -->  0x16206073645
//       9223372036854775807      -->  0x777777777777777777777
//    Base 10 conversion:
//       -9223372036854775808     -->  0x-9223372036854775808
//       -193275430               -->  0x-193275430
//       -13621                   -->  0x-13621
//       -18                      -->  0x-18
//       12                       -->  0x12
//       1914206117               -->  0x1914206117
//       9223372036854775807      -->  0x9223372036854775807
//    Base 16 conversion:
//       -9223372036854775808     -->  0x8000000000000000
//       -193275430               -->  0xfffffffff47ad9da
//       -13621                   -->  0xffffffffffffcacb
//       -18                      -->  0xffffffffffffffee
//       12                       -->  0xc
//       1914206117               -->  0x721877a5
//       9223372036854775807      -->  0x7fffffffffffffff

Dim bases() As Integer = { 2, 8, 10, 16}
Dim numbers() As Long = { Int64.MinValue, -193275430, -13621, -18, 12, _
                             1914206117, Int64.MaxValue }

For Each base As Integer In bases
   Console.WriteLine("Base {0} conversion:", base)
   For Each number As Long In numbers
      Console.WriteLine("   {0,-23}  -->  0x{1}", _
                        number, Convert.ToString(number, base))
   Next
Next
' The example displays the following output:
'    Base 2 conversion:
'       -9223372036854775808     -->  0x1000000000000000000000000000000000000000000000000000000000000000
'       -193275430               -->  0x1111111111111111111111111111111111110100011110101101100111011010
'       -13621                   -->  0x1111111111111111111111111111111111111111111111111100101011001011
'       -18                      -->  0x1111111111111111111111111111111111111111111111111111111111101110
'       12                       -->  0x1100
'       1914206117               -->  0x1110010000110000111011110100101
'       9223372036854775807      -->  0x111111111111111111111111111111111111111111111111111111111111111
'    Base 8 conversion:
'       -9223372036854775808     -->  0x1000000000000000000000
'       -193275430               -->  0x1777777777776436554732
'       -13621                   -->  0x1777777777777777745313
'       -18                      -->  0x1777777777777777777756
'       12                       -->  0x14
'       1914206117               -->  0x16206073645
'       9223372036854775807      -->  0x777777777777777777777
'    Base 10 conversion:
'       -9223372036854775808     -->  0x-9223372036854775808
'       -193275430               -->  0x-193275430
'       -13621                   -->  0x-13621
'       -18                      -->  0x-18
'       12                       -->  0x12
'       1914206117               -->  0x1914206117
'       9223372036854775807      -->  0x9223372036854775807
'    Base 16 conversion:
'       -9223372036854775808     -->  0x8000000000000000
'       -193275430               -->  0xfffffffff47ad9da
'       -13621                   -->  0xffffffffffffcacb
'       -18                      -->  0xffffffffffffffee
'       12                       -->  0xc
'       1914206117               -->  0x721877a5
'       9223372036854775807      -->  0x7fffffffffffffff

let bases = [2; 8; 10; 16]
let numbers = [ Int64.MinValue; -193275430L; -13621L; -18L; 12L; 1914206117L; Int64.MaxValue ]

for baseValue in bases do
    printfn "Base %i conversion:" baseValue
    for number in numbers do
        printfn "   % -23i  -->  0x%s" number (Convert.ToString (number, baseValue))
// The example displays the following output:
//     Base 2 conversion:
//        -9223372036854775808     -->  0x1000000000000000000000000000000000000000000000000000000000000000
//        -193275430               -->  0x1111111111111111111111111111111111110100011110101101100111011010
//        -13621                   -->  0x1111111111111111111111111111111111111111111111111100101011001011
//        -18                      -->  0x1111111111111111111111111111111111111111111111111111111111101110
//         12                      -->  0x1100
//         1914206117              -->  0x1110010000110000111011110100101
//         9223372036854775807     -->  0x111111111111111111111111111111111111111111111111111111111111111
//     Base 8 conversion:
//        -9223372036854775808     -->  0x1000000000000000000000
//        -193275430               -->  0x1777777777776436554732
//        -13621                   -->  0x1777777777777777745313
//        -18                      -->  0x1777777777777777777756
//         12                      -->  0x14
//         1914206117              -->  0x16206073645
//         9223372036854775807     -->  0x777777777777777777777
//     Base 10 conversion:
//        -9223372036854775808     -->  0x-9223372036854775808
//        -193275430               -->  0x-193275430
//        -13621                   -->  0x-13621
//        -18                      -->  0x-18
//         12                      -->  0x12
//         1914206117              -->  0x1914206117
//         9223372036854775807     -->  0x9223372036854775807
//     Base 16 conversion:
//        -9223372036854775808     -->  0x8000000000000000
//        -193275430               -->  0xfffffffff47ad9da
//        -13621                   -->  0xffffffffffffcacb
//        -18                      -->  0xffffffffffffffee
//         12                      -->  0xc
//         1914206117              -->  0x721877a5
//         9223372036854775807     -->  0x7fffffffffffffff

Remarques

Si value est positif et toBase n’est pas 10, la chaîne retournée utilise une représentation de signe et de magnitude. Si value est négatif et toBase n’est pas 10, la chaîne retournée utilise la représentation du complément de deux. Cela signifie que le bit d’ordre élevé de l’octet d’ordre le plus élevé (bit 63) est interprété comme le bit de signe. Si la ToString(Int64, Int32) méthode est appelée pour créer une chaîne qui sera convertie ultérieurement en nombre, une méthode correspondante qui suppose qu’une représentation numérique similaire doit être appelée pour effectuer la conversion. Ces méthodes incluent Convert.ToInt64(String, Int32) et Int64.Parse(String, NumberStyles).

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::Byte value, int toBase);

public static string ToString (byte value, int toBase);

static member ToString : byte * int -> string

Public Shared Function ToString (value As Byte, toBase As Integer) As String

Paramètres

Retours

Représentation sous forme de chaîne de value en base toBase.

Exceptions

Exemples

L’exemple suivant convertit chaque élément d’un tableau d’octets en représentations de chaîne binaire, hexadécimale, décimale et hexadécimale équivalentes.

int[] bases = { 2, 8, 10, 16};
byte[] numbers = { Byte.MinValue, 12, 103, Byte.MaxValue};

foreach (int baseValue in bases)
{
   Console.WriteLine("Base {0} conversion:", baseValue);
   foreach (byte number in numbers)
   {
      Console.WriteLine("   {0,-5}  -->  0x{1}",
                        number, Convert.ToString(number, baseValue));
   }
}
// The example displays the following output:
//       Base 2 conversion:
//          0      -->  0x0
//          12     -->  0x1100
//          103    -->  0x1100111
//          255    -->  0x11111111
//       Base 8 conversion:
//          0      -->  0x0
//          12     -->  0x14
//          103    -->  0x147
//          255    -->  0x377
//       Base 10 conversion:
//          0      -->  0x0
//          12     -->  0x12
//          103    -->  0x103
//          255    -->  0x255
//       Base 16 conversion:
//          0      -->  0x0
//          12     -->  0xc
//          103    -->  0x67
//          255    -->  0xff

let bases = [| 2; 8; 10; 16 |]
let numbers = [| Byte.MinValue; 12uy; 103uy; Byte.MaxValue |]

for baseValue in bases do
    printfn $"Base {baseValue} conversion:"
    for number in numbers do
        Console.WriteLine("   {0,-5}  -->  0x{1}",
                        number, Convert.ToString(number, baseValue))
// The example displays the following output:
//       Base 2 conversion:
//          0      -->  0x0
//          12     -->  0x1100
//          103    -->  0x1100111
//          255    -->  0x11111111
//       Base 8 conversion:
//          0      -->  0x0
//          12     -->  0x14
//          103    -->  0x147
//          255    -->  0x377
//       Base 10 conversion:
//          0      -->  0x0
//          12     -->  0x12
//          103    -->  0x103
//          255    -->  0x255
//       Base 16 conversion:
//          0      -->  0x0
//          12     -->  0xc
//          103    -->  0x67
//          255    -->  0xff

Dim bases() As Integer = { 2, 8, 10, 16}
Dim numbers() As Byte = { Byte.MinValue, 12, 103, Byte.MaxValue}

For Each base As Integer In bases
   Console.WriteLine("Base {0} conversion:", base)
   For Each number As Byte In numbers
      Console.WriteLine("   {0,-5}  -->  0x{1}", _
                        number, Convert.ToString(number, base))
   Next
Next
' The example displays the following output:
'       Base 2 conversion:
'          0      -->  0x0
'          12     -->  0x1100
'          103    -->  0x1100111
'          255    -->  0x11111111
'       Base 8 conversion:
'          0      -->  0x0
'          12     -->  0x14
'          103    -->  0x147
'          255    -->  0x377
'       Base 10 conversion:
'          0      -->  0x0
'          12     -->  0x12
'          103    -->  0x103
'          255    -->  0x255
'       Base 16 conversion:
'          0      -->  0x0
'          12     -->  0xc
'          103    -->  0x67
'          255    -->  0xff

let bases = [2; 8; 10; 16]
let numbers = [ Byte.MinValue; 12uy; 103uy; Byte.MaxValue ]

for baseValue in bases do
    printfn "Base %i conversion:" baseValue
    for number in numbers do
        printfn "   % -5i  -->  0x%s" number (Convert.ToString (number, baseValue))
// The example displays the following output:
//     Base 2 conversion:
//         0     -->  0x0
//         12    -->  0x1100
//         103   -->  0x1100111
//         255   -->  0x11111111
//     Base 8 conversion:
//         0     -->  0x0
//         12    -->  0x14
//         103   -->  0x147
//         255   -->  0x377
//     Base 10 conversion:
//         0     -->  0x0
//         12    -->  0x12
//         103   -->  0x103
//         255   -->  0x255
//     Base 16 conversion:
//         0     -->  0x0
//         12    -->  0xc
//         103   -->  0x67
//         255   -->  0xff

Remarques

Si toBase n’est pas égal à 10, la chaîne retournée par la Convert.ToString(Byte, Int32) méthode représente value uniquement par sa magnitude. Si la méthode est appelée pour créer une chaîne qui sera convertie ultérieurement en nombre, une méthode correspondante qui suppose qu’une représentation numérique de magnitude uniquement doit être appelée pour effectuer la conversion. Ces méthodes incluent Convert.ToByte(String, Int32) ou Byte.Parse(String, NumberStyles).

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(bool value, IFormatProvider ^ provider);

public static string ToString (bool value, IFormatProvider provider);

public static string ToString (bool value, IFormatProvider? provider);

static member ToString : bool * IFormatProvider -> string

Public Shared Function ToString (value As Boolean, provider As IFormatProvider) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit une Boolean valeur en une String avec la méthode, à l’aide ToString d’un IFormatProvider objet qui affiche le type du fournisseur de format pour lequel elle est appelée. L’exemple montre que l’objet IFormatProvider n’est pas référencé.

// Example of Convert::ToString( non-numeric types, IFormatProvider ).
using namespace System;
using namespace System::Globalization;

#define null (Object^)0

// An instance of this class can be passed to methods that require 
// an IFormatProvider.
ref class DummyProvider: public IFormatProvider
{
public:

   // Normally, GetFormat returns an object of the requested type
   // (usually itself) if it is able; otherwise, it returns Nothing. 
   virtual Object^ GetFormat( Type^ argType )
   {
      // Here, the type of argType is displayed, and GetFormat
      // always returns Nothing.
      Console::Write( "{0,-40}", argType->ToString() );
      return null;
   }
};

int main()
{
   // Create an instance of the IFormatProvider.
   DummyProvider^ provider = gcnew DummyProvider;
   String^ converted;

   // Convert these values using DummyProvider.
   int Int32A = -252645135;
   double DoubleA = 61680.3855;
   Object^ ObjDouble =  -98765.4321;
   DateTime DayTimeA = DateTime(2001,9,11,13,45,0);
   bool BoolA = true;
   String^ StringA = "Qwerty";
   Char CharA = '$';
   TimeSpan TSpanA = TimeSpan(0,18,0);
   Object^ ObjOther = static_cast<Object^>(provider);
   Console::WriteLine( "This example of "
   "Convert::ToString( non-numeric, IFormatProvider* ) \n"
   "generates the following output. The provider type, "
   "argument type, \nand argument value are displayed." );
   Console::WriteLine( "\nNote: The IFormatProvider object is "
   "not called for Boolean, String, \nChar, TimeSpan, "
   "and non-numeric Object." );

   // The format provider is called for these conversions.
   Console::WriteLine();
   converted = Convert::ToString( Int32A, provider );
   Console::WriteLine( "int      {0}", converted );
   converted = Convert::ToString( DoubleA, provider );
   Console::WriteLine( "double   {0}", converted );
   converted = Convert::ToString( ObjDouble, provider );
   Console::WriteLine( "Object   {0}", converted );
   converted = Convert::ToString( DayTimeA, provider );
   Console::WriteLine( "DateTime {0}", converted );

   // The format provider is not called for these conversions.
   Console::WriteLine();
   converted = Convert::ToString( BoolA, provider );
   Console::WriteLine( "bool     {0}", converted );
   converted = Convert::ToString( StringA, provider );
   Console::WriteLine( "String   {0}", converted );
   converted = Convert::ToString( CharA, provider );
   Console::WriteLine( "Char     {0}", converted );
   converted = Convert::ToString( TSpanA, provider );
   Console::WriteLine( "TimeSpan {0}", converted );
   converted = Convert::ToString( ObjOther, provider );
   Console::WriteLine( "Object   {0}", converted );
}

/*
This example of Convert::ToString( non-numeric, IFormatProvider* )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   Object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
String   Qwerty
Char     $
TimeSpan 00:18:00
Object   DummyProvider
*/

// Example of Convert.ToString( non-numeric types, IFormatProvider ).
using System;
using System.Globalization;

// An instance of this class can be passed to methods that require
// an IFormatProvider.
public class DummyProvider : IFormatProvider
{
    // Normally, GetFormat returns an object of the requested type
    // (usually itself) if it is able; otherwise, it returns Nothing.
    public object GetFormat( Type argType )
    {
        // Here, the type of argType is displayed, and GetFormat
        // always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) );
        return null;
    }
}

class ConvertNonNumericProviderDemo
{
    static void Main( )
    {
        // Create an instance of the IFormatProvider.
        DummyProvider provider = new DummyProvider( );
        string converted;

        // Convert these values using DummyProvider.
        int      Int32A     = -252645135;
        double   DoubleA    = 61680.3855;
        object   ObjDouble  = (object)( -98765.4321 );
        DateTime DayTimeA   = new DateTime( 2001, 9, 11, 13, 45, 0 );

        bool     BoolA      = true;
        string   StringA    = "Qwerty";
        char     CharA      = '$';
        TimeSpan TSpanA     = new TimeSpan( 0, 18, 0 );
        object   ObjOther   = (object)provider;

        Console.WriteLine( "This example of " +
            "Convert.ToString( non-numeric, IFormatProvider ) \n" +
            "generates the following output. The provider type, " +
            "argument type, \nand argument value are displayed." );
        Console.WriteLine( "\nNote: The IFormatProvider object is " +
            "not called for Boolean, String, \nChar, TimeSpan, " +
            "and non-numeric Object." );

        // The format provider is called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( Int32A, provider );
        Console.WriteLine( "int      {0}", converted );
        converted = Convert.ToString( DoubleA, provider );
        Console.WriteLine( "double   {0}", converted );
        converted = Convert.ToString( ObjDouble, provider );
        Console.WriteLine( "object   {0}", converted );
        converted = Convert.ToString( DayTimeA, provider );
        Console.WriteLine( "DateTime {0}", converted );

        // The format provider is not called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( BoolA, provider );
        Console.WriteLine( "bool     {0}", converted );
        converted = Convert.ToString( StringA, provider );
        Console.WriteLine( "string   {0}", converted );
        converted = Convert.ToString( CharA, provider );
        Console.WriteLine( "char     {0}", converted );
        converted = Convert.ToString( TSpanA, provider );
        Console.WriteLine( "TimeSpan {0}", converted );
        converted = Convert.ToString( ObjOther, provider );
        Console.WriteLine( "object   {0}", converted );
    }
}

/*
This example of Convert.ToString( non-numeric, IFormatProvider )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
string   Qwerty
char     $
TimeSpan 00:18:00
object   DummyProvider

*/

// Example of Convert.ToString(non-numeric types, IFormatProvider).
open System
open System.Globalization

// Create an instance of the IFormatProvider with an object expression.
let provider =
    { new IFormatProvider with
        // Normally, GetFormat returns an object of the requested type
        // (usually itself) if it is able; otherwise, it returns Nothing.
        member _.GetFormat(argType: Type) =
            // Here, the type of argType is displayed, and GetFormat
            // always returns Nothing.
            printf $"{argType,-40}"
            null 
    }

// Convert these values using DummyProvider.
let Int32A     = -252645135
let DoubleA    = 61680.3855
let ObjDouble  = -98765.4321 :> obj
let DayTimeA   = DateTime(2001, 9, 11, 13, 45, 0)

let BoolA      = true
let StringA    = "Qwerty"
let CharA      = '$'
let TSpanA     = TimeSpan(0, 18, 0)
let ObjOther   = provider :> obj

[<EntryPoint>]
let main _ =
    printfn
        """This example of Convert.ToString(non-numeric, IFormatProvider) 
generates the following output. The provider type, argument type, 
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String, 
Char, TimeSpan, and non-numeric Object."""

    // The format provider is called for these conversions.
    printfn ""
    let converted = Convert.ToString(Int32A, provider)
    printfn $"int      {converted}"
    let converted = Convert.ToString(DoubleA, provider)
    printfn $"double   {converted}"
    let converted = Convert.ToString(ObjDouble, provider)
    printfn $"object   {converted}"
    let converted = Convert.ToString(DayTimeA, provider)
    printfn $"DateTime {converted}"

    // The format provider is not called for these conversions.
    printfn ""
    let converted = Convert.ToString(BoolA, provider)
    printfn $"bool     {converted}"
    let converted = Convert.ToString(StringA, provider)
    printfn $"string   {converted}"
    let converted = Convert.ToString(CharA, provider)
    printfn $"char     {converted}"
    let converted = Convert.ToString(TSpanA, provider)
    printfn $"TimeSpan {converted}"
    let converted = Convert.ToString(ObjOther, provider)
    printfn $"object   {converted}"

    0

// This example of Convert.ToString(non-numeric, IFormatProvider)
// generates the following output. The provider type, argument type,
// and argument value are displayed.
//
// Note: The IFormatProvider object is not called for Boolean, String,
// Char, TimeSpan, and non-numeric Object.
//
// System.Globalization.NumberFormatInfo   int      -252645135
// System.Globalization.NumberFormatInfo   double   61680.3855
// System.Globalization.NumberFormatInfo   object   -98765.4321
// System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
//
// bool     True
// string   Qwerty
// char     $
// TimeSpan 00:18:00
// object   DummyProvider

' Example of Convert.ToString( non-numeric types, IFormatProvider ).
Imports System.Globalization

' An instance of this class can be passed to methods that require 
' an IFormatProvider.
Public Class DummyProvider
    Implements IFormatProvider

    ' Normally, GetFormat returns an object of the requested type
    ' (usually itself) if it is able; otherwise, it returns Nothing. 
    Public Function GetFormat( argType As Type ) As Object _
        Implements IFormatProvider.GetFormat

        ' Here, the type of argType is displayed, and GetFormat
        ' always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) )
        Return Nothing

    End Function 
End Class

Module ConvertNonNumericProviderDemo

    Sub Main( )

        ' Create an instance of the IFormatProvider.
        Dim provider    As New DummyProvider( )
        Dim converted   As String

        ' Convert these values using DummyProvider.
        Dim Int32A      As Integer  = -252645135   
        Dim DoubleA     As Double   = 61680.3855
        Dim ObjDouble   As Object   = CType( -98765.4321, Object )
        Dim DayTimeA    As DateTime = _
                            new DateTime( 2001, 9, 11, 13, 45, 0 )

        Dim BoolA       As Boolean  = True
        Dim StringA     As String   = "Qwerty"
        Dim CharA       As Char     = "$"c
        Dim TSpanA      As TimeSpan = New TimeSpan( 0, 18, 0 )
        Dim ObjOther    As Object   = CType( provider, Object )

        Console.WriteLine( "This example of " & _
            "Convert.ToString( non-numeric, IFormatProvider ) " & _
            vbCrLf & "generates the following output. The " & _
            "provider type, argument type, " & vbCrLf & "and " & _
            "argument value are displayed." )
        Console.WriteLine( vbCrLf & _
            "Note: The IFormatProvider object is not called for " & _
            "Boolean, String, " & vbCrLf & "Char, TimeSpan, " & _
            "and non-numeric Object." )

        ' The format provider is called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( Int32A, provider )
        Console.WriteLine( "Int32    {0}", converted )
        converted =  Convert.ToString( DoubleA, provider )
        Console.WriteLine( "Double   {0}", converted )
        converted =  Convert.ToString( ObjDouble, provider )
        Console.WriteLine( "Object   {0}", converted )
        converted =  Convert.ToString( DayTimeA, provider )
        Console.WriteLine( "DateTime {0}", converted )

        ' The format provider is not called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( BoolA, provider )
        Console.WriteLine( "Boolean  {0}", converted )
        converted =  Convert.ToString( StringA, provider )
        Console.WriteLine( "String   {0}", converted )
        converted =  Convert.ToString( CharA, provider )
        Console.WriteLine( "Char     {0}", converted )
        converted =  Convert.ToString( TSpanA, provider )
        Console.WriteLine( "TimeSpan {0}", converted )
        converted =  Convert.ToString( ObjOther, provider )
        Console.WriteLine( "Object   {0}", converted )

    End Sub
End Module

' This example of Convert.ToString( non-numeric, IFormatProvider )
' generates the following output. The provider type, argument type,
' and argument value are displayed.
'
' Note: The IFormatProvider object is not called for Boolean, String,
' Char, TimeSpan, and non-numeric Object.
' 
' System.Globalization.NumberFormatInfo   Int32    -252645135
' System.Globalization.NumberFormatInfo   Double   61680.3855
' System.Globalization.NumberFormatInfo   Object   -98765.4321
' System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
' 
' Boolean  True
' String   Qwerty
' Char     $
' TimeSpan 00:18:00
' Object   DummyProvider

Remarques

Cette implémentation est identique à Boolean.ToString. Il retourne Boolean.TrueString pour les true valeurs et Boolean.FalseString pour les false valeurs.

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::Byte value, IFormatProvider ^ provider);

public static string ToString (byte value, IFormatProvider provider);

public static string ToString (byte value, IFormatProvider? provider);

static member ToString : byte * IFormatProvider -> string

Public Shared Function ToString (value As Byte, provider As IFormatProvider) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit chaque élément d’un tableau d’octets non signé en sa représentation de chaîne équivalente à l’aide des conventions de mise en forme des cultures en-US et fr-FR. Étant donné que le spécificateur « G » génère par défaut uniquement des chiffres décimaux dans la représentation de chaîne d’une valeur d’octet, le provider paramètre n’affecte pas la mise en forme de la chaîne retournée.

byte[] numbers = { 12, 100, Byte.MaxValue };
// Define the culture names used to display them.
string[] cultureNames = { "en-US", "fr-FR" };

foreach (byte number in numbers)
{
   Console.WriteLine("{0}:", Convert.ToString(number,
                             System.Globalization.CultureInfo.InvariantCulture));
   foreach (string cultureName in cultureNames)
   {
      System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
      Console.WriteLine("   {0}: {1,20}",
                        culture.Name, Convert.ToString(number, culture));
   }
   Console.WriteLine();
}
// The example displays the following output:
//       12:
//          en-US:                   12
//          fr-FR:                   12
//
//       100:
//          en-US:                  100
//          fr-FR:                  100
//
//       255:
//          en-US:                  255
//          fr-FR:                  255

let numbers = [| 12uy; 100uy; Byte.MaxValue |]
// Define the culture names used to display them.
let cultureNames = [| "en-US"; "fr-FR" |]

for number in numbers do
    printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture)}:"
    for cultureName in cultureNames do
        let culture = CultureInfo cultureName
        printfn $"   {culture.Name}: {Convert.ToString(number, culture),20}"
    printfn ""
// The example displays the following output:
//       12:
//          en-US:                   12
//          fr-FR:                   12
//
//       100:
//          en-US:                  100
//          fr-FR:                  100
//
//       255:
//          en-US:                  255
//          fr-FR:                  255

' Define an array of numbers to display.
Dim numbers() As Byte = { 12, 100, Byte.MaxValue }
' Define the culture names used to display them.
Dim cultureNames() As String = { "en-US", "fr-FR" }

For Each number As Byte In numbers
   Console.WriteLine("{0}:", Convert.ToString(number, _
                             System.Globalization.CultureInfo.InvariantCulture))
   For Each cultureName As String In cultureNames
      Dim culture As New System.Globalization.CultureInfo(cultureName)
      Console.WriteLine("   {0}: {1,20}", _
                        culture.Name, Convert.ToString(number, culture))
   Next
   Console.WriteLine()
Next   
' The example displays the following output:
'       12:
'          en-US:                   12
'          fr-FR:                   12
'       
'       100:
'          en-US:                  100
'          fr-FR:                  100
'       
'       255:
'          en-US:                  255
'          fr-FR:                  255

Remarques

Cette implémentation est identique à Byte.ToString.

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(bool value);

public static string ToString (bool value);

static member ToString : bool -> string

Public Shared Function ToString (value As Boolean) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant illustre la conversion d’un BooleanStringen , à l’aide ToStringde . Il illustre également que la chaîne retournée par la conversion est égale à Boolean.TrueString ou Boolean.FalseString.

bool falseFlag = false;
bool trueFlag = true;

Console.WriteLine(Convert.ToString(falseFlag));
Console.WriteLine(Convert.ToString(falseFlag).Equals(Boolean.FalseString));
Console.WriteLine(Convert.ToString(trueFlag));
Console.WriteLine(Convert.ToString(trueFlag).Equals(Boolean.TrueString));
// The example displays the following output:
//       False
//       True
//       True
//       True

let falseFlag = false
let trueFlag = true

printfn $"{Convert.ToString falseFlag}"
printfn $"{Convert.ToString(falseFlag).Equals Boolean.FalseString}"
printfn $"{Convert.ToString trueFlag}"
printfn $"{Convert.ToString(trueFlag).Equals(Boolean.TrueString)}"
// The example displays the following output:
//       False
//       True
//       True
//       True

Dim falseFlag As Boolean = False
Dim trueFlag As Boolean = True

Console.WriteLine(Convert.ToString(falseFlag))
Console.WriteLine(Convert.ToString(falseFlag).Equals(Boolean.FalseString))
Console.WriteLine(Convert.ToString(trueFlag))
Console.WriteLine(Convert.ToString(trueFlag).Equals(Boolean.TrueString))
' The example displays the following output:
'       False
'       True
'       True
'       True

let falseFlag = false
let trueFlag = true

Console.WriteLine (Convert.ToString falseFlag)
Console.WriteLine (Convert.ToString falseFlag=Boolean.FalseString)
Console.WriteLine (Convert.ToString trueFlag)
Console.WriteLine (Convert.ToString trueFlag=Boolean.TrueString)
// The example displays the following output:
//       False
//       True
//       True
//       True

Remarques

Cette implémentation est identique à Boolean.ToString. Il retourne Boolean.TrueString pour les true valeurs et Boolean.FalseString pour les false valeurs.

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::Byte value);

public static string ToString (byte value);

static member ToString : byte -> string

Public Shared Function ToString (value As Byte) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit chaque valeur d’un Byte tableau en chaîne.

using System;

public class Example
{
   public static void Main()
   {
      byte[] values = { Byte.MinValue, 12, 100, 179, Byte.MaxValue } ;

      foreach (var value in values)
         Console.WriteLine("{0,3} ({1}) --> {2}", value,
                           value.GetType().Name,
                           Convert.ToString(value));
   }
}
// The example displays the following output:
//       0 (Byte) --> 0
//      12 (Byte) --> 12
//     100 (Byte) --> 100
//     179 (Byte) --> 179
//     255 (Byte) --> 255

open System

let values = 
   [| Byte.MinValue; 12uy; 100uy; 179uy; Byte.MaxValue |]

for value in values do
   printfn $"{value,3} ({value.GetType().Name}) --> {Convert.ToString value}"
                     
// The example displays the following output:
//       0 (Byte) --> 0
//      12 (Byte) --> 12
//     100 (Byte) --> 100
//     179 (Byte) --> 179
//     255 (Byte) --> 255

Public Module Example
   Public Sub Main()
      Dim values() As Byte = { Byte.MinValue, 12, 100, 179, Byte.MaxValue }

      For Each value In values
         Console.WriteLine("{0,3} ({1}) --> {2}", value, 
                           value.GetType().Name, 
                           Convert.ToString(value))
      Next                           
   End Sub
End Module
' The example displays the following output:
'       0 (Byte) --> 0
'      12 (Byte) --> 12
'     100 (Byte) --> 100
'     179 (Byte) --> 179
'     255 (Byte) --> 255

let values = [ Byte.MinValue; 12uy; 100uy; 179uy; Byte.MaxValue ]
for value in values do
    printfn "% 4i (%s) --> %s" value (value.GetType().Name) (Convert.ToString value)
// The example displays the following output:
//       0 (Byte) --> 0
//      12 (Byte) --> 12
//     100 (Byte) --> 100
//     179 (Byte) --> 179
//     255 (Byte) --> 255

Remarques

Cette implémentation est identique à Byte.ToString().

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(char value);

public static string ToString (char value);

static member ToString : char -> string

Public Shared Function ToString (value As Char) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit un Char en String.

public:
   void ConvertStringChar( String^ stringVal )
   {
      Char charVal = 'a';
      
      // A String must be one character long to convert to char.
      try
      {
         charVal = System::Convert::ToChar( stringVal );
         System::Console::WriteLine( " {0} as a char is {1}",
            stringVal, charVal );
      }
      catch ( System::FormatException^ ) 
      {
         System::Console::WriteLine(
            "The String is longer than one character." );
      }
      catch ( System::ArgumentNullException^ ) 
      {
         System::Console::WriteLine( "The String is 0." );
      }
      
      // A char to String conversion will always succeed.
      stringVal = System::Convert::ToString( charVal );
      System::Console::WriteLine( "The character as a String is {0}",
         stringVal );
   }

public void ConvertStringChar(string stringVal) {
    char charVal = 'a';

    // A string must be one character long to convert to char.
    try {
        charVal = System.Convert.ToChar(stringVal);
        System.Console.WriteLine("{0} as a char is {1}",
            stringVal, charVal);
    }
    catch (System.FormatException) {
        System.Console.WriteLine(
            "The string is longer than one character.");
    }
    catch (System.ArgumentNullException) {
        System.Console.WriteLine("The string is null.");
    }

    // A char to string conversion will always succeed.
    stringVal = System.Convert.ToString(charVal);
    System.Console.WriteLine("The character as a string is {0}",
            stringVal);
}

let convertStringChar (stringVal: string) =
    let charVal = 'a'

    // A string must be one character long to convert to char.
    try
        let charVal = Convert.ToChar stringVal
        printfn $"{stringVal} as a char is {charVal}"
    with
    | :? FormatException ->
        printfn "The string is longer than one character."
    | :? ArgumentNullException ->
        printfn "The string is null."

    // A char to string conversion will always succeed.
    let stringVal = Convert.ToString charVal
    printfn $"The character as a string is {stringVal}"

Public Sub ConvertStringChar(ByVal stringVal As String)
    Dim charVal As Char = "a"c

    ' A string must be one character long to convert to char.
    Try
        charVal = System.Convert.ToChar(stringVal)
        System.Console.WriteLine("{0} as a char is {1}", _
                                  stringVal, charVal)
    Catch exception As System.FormatException
        System.Console.WriteLine( _
         "The string is longer than one character.")
    Catch exception As System.ArgumentNullException
        System.Console.WriteLine("The string is null.")
    End Try

    ' A char to string conversion will always succeed.
    stringVal = System.Convert.ToString(charVal)
    System.Console.WriteLine("The character as a string is {0}", _
                              stringVal)
End Sub

Remarques

Cette implémentation est identique à Char.ToString.

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(DateTime value);

public static string ToString (DateTime value);

static member ToString : DateTime -> string

Public Shared Function ToString (value As DateTime) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit chaque élément d’un tableau d’une DateTime valeur en valeur String .

DateTime[] dates = { new DateTime(2009, 7, 14),
                     new DateTime(1, 1, 1, 18, 32, 0),
                     new DateTime(2009, 2, 12, 7, 16, 0) };
string result;

foreach (DateTime dateValue in dates)
{
   result = Convert.ToString(dateValue);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        dateValue.GetType().Name, dateValue,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the DateTime value 7/14/2009 12:00:00 AM to a String value 7/14/2009 12:00:00 AM.
//    Converted the DateTime value 1/1/0001 06:32:00 PM to a String value 1/1/0001 06:32:00 PM.
//    Converted the DateTime value 2/12/2009 07:16:00 AM to a String value 2/12/2009 07:16:00 AM.

let dates =
    [| DateTime(2009, 7, 14)
       DateTime(1, 1, 1, 18, 32, 0)
       DateTime(2009, 2, 12, 7, 16, 0) |]

for dateValue in dates do
    let result = Convert.ToString dateValue
    printfn $"Converted the {dateValue.GetType().Name} value {dateValue} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the DateTime value 7/14/2009 12:00:00 AM to a String value 7/14/2009 12:00:00 AM.
//    Converted the DateTime value 1/1/0001 06:32:00 PM to a String value 1/1/0001 06:32:00 PM.
//    Converted the DateTime value 2/12/2009 07:16:00 AM to a String value 2/12/2009 07:16:00 AM.

Dim dates() As Date = { #07/14/2009#, #6:32PM#, #02/12/2009 7:16AM#}
Dim result As String

For Each dateValue As Date In dates
   result = Convert.ToString(dateValue)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        dateValue.GetType().Name, dateValue, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the DateTime value 7/14/2009 12:00:00 AM to a String value 7/14/2009 12:00:00 AM.
'    Converted the DateTime value 1/1/0001 06:32:00 PM to a String value 1/1/0001 06:32:00 PM.
'    Converted the DateTime value 2/12/2009 07:16:00 AM to a String value 2/12/2009 07:16:00 AM.

Remarques

Cette implémentation est identique à DateTime.ToString(). Il utilise les conventions de mise en forme de la culture actuelle et le spécificateur de format « G » pour convertir une DateTime valeur en sa représentation sous forme de chaîne.

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(double value);

public static string ToString (double value);

static member ToString : double -> string

Public Shared Function ToString (value As Double) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit un Double en String.

public:
   void ConvertDoubleString( double doubleVal )
   {
      String^ stringVal;
      
      // A conversion from Double to String cannot overflow.
      stringVal = System::Convert::ToString( doubleVal );
      System::Console::WriteLine( " {0} as a String is: {1}",
         doubleVal, stringVal );
      try
      {
         doubleVal = System::Convert::ToDouble( stringVal );
         System::Console::WriteLine( " {0} as a double is: {1}",
         stringVal, doubleVal );
      }
      catch ( System::OverflowException^ ) 
      {
         System::Console::WriteLine( "Conversion from String-to-double overflowed." );
      }
      catch ( System::FormatException^ ) 
      {
         System::Console::WriteLine( "The String was not formatted as a double." );
      }
      catch ( System::ArgumentException^ ) 
      {
         System::Console::WriteLine( "The String pointed to null." );
      }
   }

public void ConvertDoubleString(double doubleVal) {
    
    string	stringVal;

    // A conversion from Double to string cannot overflow.
    stringVal = System.Convert.ToString(doubleVal);
    System.Console.WriteLine("{0} as a string is: {1}",
        doubleVal, stringVal);

    try {
        doubleVal = System.Convert.ToDouble(stringVal);
        System.Console.WriteLine("{0} as a double is: {1}",
            stringVal, doubleVal);
    }
    catch (System.OverflowException) {
        System.Console.WriteLine(
            "Conversion from string-to-double overflowed.");
    }
    catch (System.FormatException) {
        System.Console.WriteLine(
            "The string was not formatted as a double.");
    }
    catch (System.ArgumentException) {
        System.Console.WriteLine(
            "The string pointed to null.");
    }
}

let convertDoubleString (doubleVal: float) =
    // A conversion from Double to string cannot overflow.
    let stringVal = Convert.ToString doubleVal
    printfn $"{doubleVal} as a string is: {stringVal}"

    try
        let doubleVal = Convert.ToDouble stringVal
        printfn $"{stringVal} as a double is: {doubleVal}"
    with
    | :? OverflowException ->
        printfn "Conversion from string-to-double overflowed."
    | :? FormatException ->
        printfn "The string was not formatted as a double."
    | :? ArgumentException ->
        printfn "The string pointed to null."

Public Sub ConvertDoubleString(ByVal doubleVal As Double)

    Dim stringVal As String

    ' A conversion from Double to String cannot overflow.       
    stringVal = System.Convert.ToString(doubleVal)
    System.Console.WriteLine("{0} as a String is: {1}", _
                              doubleVal, stringVal)

    Try
        doubleVal = System.Convert.ToDouble(stringVal)
        System.Console.WriteLine("{0} as a Double is: {1}", _
                                  stringVal, doubleVal)
    Catch exception As System.OverflowException
        System.Console.WriteLine( _
            "Overflow in String-to-Double conversion.")
    Catch exception As System.FormatException
        System.Console.WriteLine( _
            "The string is not formatted as a Double.")
    Catch exception As System.ArgumentException
        System.Console.WriteLine("The string is null.")
    End Try

End Sub

Remarques

Cette implémentation est identique à Double.ToString().

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(short value);

public static string ToString (short value);

static member ToString : int16 -> string

Public Shared Function ToString (value As Short) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit chaque élément d’un tableau d’entiers 16 bits en sa représentation de chaîne équivalente.

short[] numbers = { Int16.MinValue, -138, 0, 19, Int16.MaxValue };
string result;

foreach (short number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the Int16 value -32768 to the String value -32768.
//    Converted the Int16 value -138 to the String value -138.
//    Converted the Int16 value 0 to the String value 0.
//    Converted the Int16 value 19 to the String value 19.
//    Converted the Int16 value 32767 to the String value 32767.

let numbers = [| Int16.MinValue; -138s; 0s; 19s; Int16.MaxValue |]

for number in numbers do
    let result = Convert.ToString number
    printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the Int16 value -32768 to the String value -32768.
//    Converted the Int16 value -138 to the String value -138.
//    Converted the Int16 value 0 to the String value 0.
//    Converted the Int16 value 19 to the String value 19.
//    Converted the Int16 value 32767 to the String value 32767.

Dim numbers() As Short = { Int16.MinValue, -138, 0, 19, Int16.MaxValue }
Dim result As String

For Each number As Short In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next     
' The example displays the following output:
'    Converted the Int16 value -32768 to the String value -32768.
'    Converted the Int16 value -138 to the String value -138.
'    Converted the Int16 value 0 to the String value 0.
'    Converted the Int16 value 19 to the String value 19.
'    Converted the Int16 value 32767 to the String value 32767.

Remarques

Cette implémentation est identique à Int16.ToString().

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(int value);

public static string ToString (int value);

static member ToString : int -> string

Public Shared Function ToString (value As Integer) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant compare la ToString(Int32) méthode à la ToString(UInt16, IFormatProvider) méthode . Il définit un objet personnalisé NumberFormatInfo qui utilise la piqûre « moins » pour représenter le signe négatif. Il convertit chaque élément d’un tableau d’entiers en sa représentation de chaîne équivalente à l’aide de la mise en forme par défaut (les conventions de mise en forme de la culture actuelle) et du fournisseur de format personnalisé.

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      // Create a NumberFormatInfo object and set its NegativeSigns
      // property to use for integer formatting.
      NumberFormatInfo provider = new NumberFormatInfo();
      provider.NegativeSign = "minus ";

      int[] values = { -20, 0, 100 };

      Console.WriteLine("{0,-8} --> {1,10} {2,10}\n", "Value",
                         CultureInfo.CurrentCulture.Name,
                         "Custom");
      foreach (int value in values)
         Console.WriteLine("{0,-8} --> {1,10} {2,10}",
                           value, Convert.ToString(value),
                           Convert.ToString(value, provider));
      // The example displays output like the following:
      //       Value    -->      en-US     Custom
      //
      //       -20      -->        -20   minus 20
      //       0        -->          0          0
      //       100      -->        100        100
   }
}

open System
open System.Globalization

// Create a NumberFormatInfo object and set its NegativeSigns
// property to use for integer formatting.
let provider = NumberFormatInfo()
provider.NegativeSign <- "minus "

let values = [| -20; 0; 100 |]

printfn $"""{CultureInfo.CurrentCulture.Name,-8} --> {"Value",10} {"Custom",10}\n"""
                    
for value in values do
    printfn $"{value,-8} --> {Convert.ToString value,10} {Convert.ToString(value, provider),10}"
// The example displays output like the following:
//       Value    -->      en-US     Custom
//
//       -20      -->        -20   minus 20
//       0        -->          0          0
//       100      -->        100        100

Imports System.Globalization

Module Example
   Public Sub Main()
      ' Create a NumberFormatInfo object and set its NegativeSigns
      ' property to use for integer formatting.
      Dim provider As New NumberFormatInfo()
      provider.NegativeSign = "minus "

      Dim values() As Integer = { -20, 0, 100 }

      Console.WriteLine("{0,-8} --> {1,10} {2,10}", "Value",
                         CultureInfo.CurrentCulture.Name,
                         "Custom")
      Console.WriteLine()
      For Each value As Integer In values
         Console.WriteLine("{0,-8} --> {1,10} {2,10}",
                           value, Convert.ToString(value),
                           Convert.ToString(value, provider))
      Next
   End Sub
End Module
' The example displays output like the following:
'       Value    -->      en-US     Custom
'
'       -20      -->        -20   minus 20
'       0        -->          0          0
'       100      -->        100        100

Remarques

Cette implémentation est identique à Int32.ToString(). Il met en forme value à l’aide des conventions de mise en forme de la culture actuelle.

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::Decimal value);

public static string ToString (decimal value);

static member ToString : decimal -> string

Public Shared Function ToString (value As Decimal) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit un Decimal en String.

public:
   void ConvertStringDecimal( String^ stringVal )
   {
      Decimal decimalVal = 0;

      try
      {
         decimalVal = System::Convert::ToDecimal( stringVal );
         System::Console::WriteLine( "The String as a decimal is {0}.",
         decimalVal );
      }
      catch ( System::OverflowException^ ) 
      {
         System::Console::WriteLine(
            "The conversion from String to decimal overflowed." );
      }
      catch ( System::FormatException^ ) 
      {
         System::Console::WriteLine(
            "The String is not formatted as a decimal." );
      }
      catch ( System::ArgumentNullException^ ) 
      {
         System::Console::WriteLine( "The String is 0." );
      }
      
      // Decimal to String conversion will not overflow.
      stringVal = System::Convert::ToString( decimalVal );
      System::Console::WriteLine(
         "The decimal as a String is {0}.", stringVal );
   }

public void ConvertStringDecimal(string stringVal) {
    decimal decimalVal = 0;
    
    try {
        decimalVal = System.Convert.ToDecimal(stringVal);
        System.Console.WriteLine(
            "The string as a decimal is {0}.", decimalVal);
    }
    catch (System.OverflowException){
        System.Console.WriteLine(
            "The conversion from string to decimal overflowed.");
    }
    catch (System.FormatException) {
        System.Console.WriteLine(
            "The string is not formatted as a decimal.");
    }
    catch (System.ArgumentNullException) {
        System.Console.WriteLine(
            "The string is null.");
    }

    // Decimal to string conversion will not overflow.
    stringVal = System.Convert.ToString(decimalVal);
    System.Console.WriteLine(
        "The decimal as a string is {0}.", stringVal);
}

let convertStringDecimal (stringVal: string) =
    let decimalVal = 0m

    try
        let decimalVal = Convert.ToDecimal(stringVal)
        printfn $"The string as a decimal is {decimalVal}."
    with
    | :? OverflowException ->
        printfn "The conversion from string to decimal overflowed."
    | :? FormatException ->
        printfn "The string is not formatted as a decimal."
    | :? ArgumentNullException ->
        printfn "The string is null."

    // Decimal to string conversion will not overflow.
    let stringVal = Convert.ToString decimalVal
    printfn $"The decimal as a string is {stringVal}."

Public Sub ConvertStringDecimal(ByVal stringVal As String)
    Dim decimalVal As Decimal = 0

    Try
        decimalVal = System.Convert.ToDecimal(stringVal)
        System.Console.WriteLine("The string as a decimal is {0}.", _
                                  decimalVal)
    Catch exception As System.OverflowException
        System.Console.WriteLine( _
            "Overflow in string-to-decimal conversion.")
    Catch exception As System.FormatException
        System.Console.WriteLine( _
            "The string is not formatted as a decimal.")
    Catch exception As System.ArgumentException
        System.Console.WriteLine("The string is null.")
    End Try

    ' Decimal to string conversion will not overflow.
    stringVal = System.Convert.ToString(decimalVal)
    System.Console.WriteLine("The decimal as a string is {0}.", _
                              stringVal)
End Sub

Remarques

Cette implémentation est identique à Decimal.ToString().

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::Object ^ value);

public static string ToString (object value);

public static string? ToString (object? value);

static member ToString : obj -> string

Public Shared Function ToString (value As Object) As String

Paramètres

Retours

Représentation sous forme de chaîne de value ou Empty si value est null.

Exemples

L’exemple suivant convertit chaque élément d’un tableau d’objets en représentation de chaîne équivalente.

object[] values = { false, 12.63m, new DateTime(2009, 6, 1, 6, 32, 15), 16.09e-12,
                    'Z', 15.15322, SByte.MinValue, Int32.MaxValue };
string result;

foreach (object value in values)
{
   result = Convert.ToString(value);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the Boolean value False to the String value False.
//    Converted the Decimal value 12.63 to the String value 12.63.
//    Converted the DateTime value 6/1/2009 06:32:15 AM to the String value 6/1/2009 06:32:15 AM.
//    Converted the Double value 1.609E-11 to the String value 1.609E-11.
//    Converted the Char value Z to the String value Z.
//    Converted the Double value 15.15322 to the String value 15.15322.
//    Converted the SByte value -128 to the String value -128.
//    Converted the Int32 value 2147483647 to the String value 2147483647.

let values: obj[] =
    [| false; 12.63m; DateTime(2009, 6, 1, 6, 32, 15)
       16.09e-12; 'Z'; 15.15322; SByte.MinValue; Int32.MaxValue |]

for value in values do
    let result = Convert.ToString value
    printfn $"Converted the {value.GetType().Name} value {value} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the Boolean value False to the String value False.
//    Converted the Decimal value 12.63 to the String value 12.63.
//    Converted the DateTime value 6/1/2009 06:32:15 AM to the String value 6/1/2009 06:32:15 AM.
//    Converted the Double value 1.609E-11 to the String value 1.609E-11.
//    Converted the Char value Z to the String value Z.
//    Converted the Double value 15.15322 to the String value 15.15322.
//    Converted the SByte value -128 to the String value -128.
//    Converted the Int32 value 2147483647 to the String value 2147483647.

Dim values() As Object = { False, 12.63d, #06/01/2009 6:32:15#, 16.09e-12, _
                           "Z"c, 15.15322, SByte.MinValue, Int32.MaxValue}
Dim result As String

For Each value As Object In values
   result = Convert.ToString(value)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        value.GetType().Name, value, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the Boolean value False to the String value False.
'    Converted the Decimal value 12.63 to the String value 12.63.
'    Converted the DateTime value 6/1/2009 06:32:15 AM to the String value 6/1/2009 06:32:15 AM.
'    Converted the Double value 1.609E-11 to the String value 1.609E-11.
'    Converted the Char value Z to the String value Z.
'    Converted the Double value 15.15322 to the String value 15.15322.
'    Converted the SByte value -128 to the String value -128.
'    Converted the Int32 value 2147483647 to the String value 2147483647.

Remarques

Pour convertir en value sa représentation sous forme de chaîne, la méthode tente d’appeler l’implémentation IConvertible.ToString de value. Si value n’implémente pas l’interface IConvertible , la méthode tente d’appeler l’implémentation IFormattable.ToString de value. Si la valeur n’implémente pas l’interface IFormattable , la méthode appelle la ToString méthode du type sous-jacent de value.

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::SByte value);

[System.CLSCompliant(false)]
public static string ToString (sbyte value);

[<System.CLSCompliant(false)>]
static member ToString : sbyte -> string

Public Shared Function ToString (value As SByte) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Attributs

CLSCompliantAttribute

Exemples

L’exemple suivant convertit chaque élément d’un tableau d’octets signé en sa représentation sous forme de chaîne équivalente.

sbyte[] numbers = { SByte.MinValue, -12, 0, 16, SByte.MaxValue };
string result;

foreach (sbyte number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the SByte value -128 to the String value -128.
//    Converted the SByte value -12 to the String value -12.
//    Converted the SByte value 0 to the String value 0.
//    Converted the SByte value 16 to the String value 16.
//    Converted the SByte value 127 to the String value 127.

let numbers = [| SByte.MinValue; -12y; 0y; 16y; SByte.MaxValue |]

for number in numbers do
    let result = Convert.ToString number
    printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the SByte value -128 to the String value -128.
//    Converted the SByte value -12 to the String value -12.
//    Converted the SByte value 0 to the String value 0.
//    Converted the SByte value 16 to the String value 16.
//    Converted the SByte value 127 to the String value 127.

Dim numbers() As SByte = { SByte.MinValue, -12, 0, 16, SByte.MaxValue }
Dim result As String

For Each number As SByte In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the SByte value -128 to the String value -128.
'    Converted the SByte value -12 to the String value -12.
'    Converted the SByte value 0 to the String value 0.
'    Converted the SByte value 16 to the String value 16.
'    Converted the SByte value 127 to the String value 127.

Remarques

Cette implémentation est identique à SByte.ToString().

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(float value);

public static string ToString (float value);

static member ToString : single -> string

Public Shared Function ToString (value As Single) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit chaque élément d’un tableau de Single valeurs en sa représentation sous forme de chaîne équivalente.

float[] numbers = { Single.MinValue, -1011.351f, -17.45f, -3e-16f,
                    0f, 4.56e-12f, 16.0001f, 10345.1221f, Single.MaxValue };
string result;

foreach (float number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the Single value -3.402823E+38 to the String value -3.402823E+38.
//    Converted the Single value -1011.351 to the String value -1011.351.
//    Converted the Single value -17.45 to the String value -17.45.
//    Converted the Single value -3E-16 to the String value -3E-16.
//    Converted the Single value 0 to the String value 0.
//    Converted the Single value 4.56E-12 to the String value 4.56E-12.
//    Converted the Single value 16.0001 to the String value 16.0001.
//    Converted the Single value 10345.12 to the String value 10345.12.
//    Converted the Single value 3.402823E+38 to the String value 3.402823E+38.

let numbers = 
    [| Single.MinValue; -1011.351f; -17.45f; -3e-16f; 0f; 4.56e-12f; 16.0001f; 10345.1221f; Single.MaxValue |]

for number in numbers do
    let result = Convert.ToString number
    printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the Single value -3.402823E+38 to the String value -3.402823E+38.
//    Converted the Single value -1011.351 to the String value -1011.351.
//    Converted the Single value -17.45 to the String value -17.45.
//    Converted the Single value -3E-16 to the String value -3E-16.
//    Converted the Single value 0 to the String value 0.
//    Converted the Single value 4.56E-12 to the String value 4.56E-12.
//    Converted the Single value 16.0001 to the String value 16.0001.
//    Converted the Single value 10345.12 to the String value 10345.12.
//    Converted the Single value 3.402823E+38 to the String value 3.402823E+38.

Dim numbers() As Single = { Single.MinValue, -1011.351, -17.45, -3e-16, _
                            0, 4.56e-12, 16.0001, 10345.1221, Single.MaxValue }
Dim result As String

For Each number As Single In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next                            
' The example displays the following output:
'    Converted the Single value -3.402823E+38 to the String value -3.402823E+38.
'    Converted the Single value -1011.351 to the String value -1011.351.
'    Converted the Single value -17.45 to the String value -17.45.
'    Converted the Single value -3E-16 to the String value -3E-16.
'    Converted the Single value 0 to the String value 0.
'    Converted the Single value 4.56E-12 to the String value 4.56E-12.
'    Converted the Single value 16.0001 to the String value 16.0001.
'    Converted the Single value 10345.12 to the String value 10345.12.
'    Converted the Single value 3.402823E+38 to the String value 3.402823E+38.

Remarques

Cette implémentation est identique à Single.ToString().

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::String ^ value);

public static string? ToString (string? value);

public static string ToString (string value);

static member ToString : string -> string

Public Shared Function ToString (value As String) As String

Paramètres

Retours

value est retourné sans modification.

Exemples

L’exemple suivant passe une chaîne à la ToString(String) méthode et appelle la Object.ReferenceEquals méthode pour confirmer que la méthode retourne la chaîne d’origine. L’exemple appelle également la String.IsInterned méthode pour s’assurer que les deux chaînes ne sont pas identiques, car la chaîne d’origine est interne.

using System;

public class Example
{
   public static void Main()
   {
      String article = "An";
      String noun = "apple";
      String str1 = String.Format("{0} {1}", article, noun);
      String str2 = Convert.ToString(str1);

      Console.WriteLine("str1 is interned: {0}",
                        ! (String.IsInterned(str1) == null));
      Console.WriteLine("str1 and str2 are the same reference: {0}",
                        Object.ReferenceEquals(str1, str2));
   }
}
// The example displays the following output:
//       str1 is interned: False
//       str1 and str2 are the same reference: True

open System

let article = "An"
let noun = "apple"
let str1 = $"{article} {noun}"
let str2 = Convert.ToString str1

printfn $"str1 is interned: {String.IsInterned str1 <> null}"
                  
printfn $"str1 and str2 are the same reference: {Object.ReferenceEquals(str1, str2)}"
// The example displays the following output:
//       str1 is interned: False
//       str1 and str2 are the same reference: True

Module Example
   Public Sub Main()
      Dim article As String = "An"
      Dim noun As String = "apple"
      Dim str1 As String = String.Format("{0} {1}", article, noun)
      Dim str2 As String = Convert.ToString(str1)

      Console.WriteLine("str1 is interned: {0}",
                        Not String.IsInterned(str1) Is Nothing)
      Console.WriteLine("str1 and str2 are the same reference: {0}",
                        Object.ReferenceEquals(str1, str2))
   End Sub
End Module
' The example displays the following output:
'       str1 is interned: False
'       str1 and str2 are the same reference: True

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::UInt16 value);

[System.CLSCompliant(false)]
public static string ToString (ushort value);

[<System.CLSCompliant(false)>]
static member ToString : uint16 -> string

Public Shared Function ToString (value As UShort) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Attributs

CLSCompliantAttribute

Exemples

L’exemple suivant convertit chaque élément d’un tableau de valeurs entières 16 bits non signées en sa représentation sous forme de chaîne équivalente.

ushort[] numbers = { UInt16.MinValue, 103, 1045, UInt16.MaxValue };
string result;

foreach (ushort number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the UInt16 value 0 to the String value 0.
//    Converted the UInt16 value 103 to the String value 103.
//    Converted the UInt16 value 1045 to the String value 1045.
//    Converted the UInt16 value 65535 to the String value 65535.

let numbers = [| UInt16.MinValue; 103us; 1045us; UInt16.MaxValue |]

for number in numbers do
    let result = Convert.ToString number
    printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the UInt16 value 0 to the String value 0.
//    Converted the UInt16 value 103 to the String value 103.
//    Converted the UInt16 value 1045 to the String value 1045.
//    Converted the UInt16 value 65535 to the String value 65535.

Dim numbers() As UShort = { UInt16.MinValue, 103, 1045, UInt16.MaxValue }
Dim result As String

For Each number As UShort In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the UInt16 value 0 to the String value 0.
'    Converted the UInt16 value 103 to the String value 103.
'    Converted the UInt16 value 1045 to the String value 1045.
'    Converted the UInt16 value 65535 to the String value 65535.

Remarques

Cette implémentation est identique à UInt16.ToString().

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::UInt32 value);

[System.CLSCompliant(false)]
public static string ToString (uint value);

[<System.CLSCompliant(false)>]
static member ToString : uint32 -> string

Public Shared Function ToString (value As UInteger) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Attributs

CLSCompliantAttribute

Exemples

L’exemple suivant convertit chaque élément d’un tableau d’entiers non signés en sa représentation sous forme de chaîne équivalente.

uint[] numbers = { UInt32.MinValue, 103, 1045, 119543, UInt32.MaxValue };
string result;

foreach (uint number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the UInt32 value 0 to the String value 0.
//    Converted the UInt32 value 103 to the String value 103.
//    Converted the UInt32 value 1045 to the String value 1045.
//    Converted the UInt32 value 119543 to the String value 119543.
//    Converted the UInt32 value 4294967295 to the String value 4294967295.

let numbers = [| UInt32.MinValue; 103u; 1045u; 119543u; UInt32.MaxValue |]

for number in numbers do
    let result = Convert.ToString number
    printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the UInt32 value 0 to the String value 0.
//    Converted the UInt32 value 103 to the String value 103.
//    Converted the UInt32 value 1045 to the String value 1045.
//    Converted the UInt32 value 119543 to the String value 119543.
//    Converted the UInt32 value 4294967295 to the String value 4294967295.

Dim numbers() As UInteger = { UInt32.MinValue, 103, 1045, 119543, UInt32.MaxValue }
Dim result As String

For Each number As UInteger In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the UInt32 value 0 to the String value 0.
'    Converted the UInt32 value 103 to the String value 103.
'    Converted the UInt32 value 1045 to the String value 1045.
'    Converted the UInt32 value 119543 to the String value 119543.
'    Converted the UInt32 value 4294967295 to the String value 4294967295.

Remarques

Cette implémentation est identique à UInt32.ToString().

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(System::UInt64 value);

[System.CLSCompliant(false)]
public static string ToString (ulong value);

[<System.CLSCompliant(false)>]
static member ToString : uint64 -> string

Public Shared Function ToString (value As ULong) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Attributs

CLSCompliantAttribute

Exemples

L’exemple suivant convertit chaque élément d’un tableau d’entiers longs non signés en sa représentation sous forme de chaîne équivalente.

ulong[] numbers = { UInt64.MinValue, 1031, 189045, UInt64.MaxValue };
string result;

foreach (ulong number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the UInt64 value 0 to the String value 0.
//    Converted the UInt64 value 1031 to the String value 1031.
//    Converted the UInt64 value 189045 to the String value 189045.
//    Converted the UInt64 value 18446744073709551615 to the String value 18446744073709551615.

let numbers = [| UInt64.MinValue; 1031uL; 189045uL; UInt64.MaxValue |]

for number in numbers do
    let result = Convert.ToString number
    printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the UInt64 value 0 to the String value 0.
//    Converted the UInt64 value 1031 to the String value 1031.
//    Converted the UInt64 value 189045 to the String value 189045.
//    Converted the UInt64 value 18446744073709551615 to the String value 18446744073709551615.

Dim numbers() As ULong = { UInt64.MinValue, 1031, 189045, UInt64.MaxValue }
Dim result As String

For Each number As ULong In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the UInt64 value 0 to the String value 0.
'    Converted the UInt64 value 1031 to the String value 1031.
'    Converted the UInt64 value 189045 to the String value 189045.
'    Converted the UInt64 value 18446744073709551615 to the String value 18446744073709551615.

Remarques

Cette implémentation est identique à UInt64.ToString().

Source:

Convert.cs

Source:

Convert.cs

Source:

Convert.cs

public:
 static System::String ^ ToString(long value);

public static string ToString (long value);

static member ToString : int64 -> string

Public Shared Function ToString (value As Long) As String

Paramètres

Retours

Représentation sous forme de chaîne de value.

Exemples

L’exemple suivant convertit chaque élément d’un tableau d’entiers longs en sa représentation sous forme de chaîne équivalente.

// Create a NumberFormatInfo object and set several of its
// properties that control default integer formatting.
System.Globalization.NumberFormatInfo provider = new System.Globalization.NumberFormatInfo();
provider.NegativeSign = "minus ";

long[] values = { -200, 0, 1000 };

foreach (long value in values)
   Console.WriteLine("{0,-6}  -->  {1,10}",
                     value, Convert.ToString(value, provider));
// The example displays the following output:
//       -200    -->   minus 200
//       0       -->           0
//       1000    -->        1000

// Create a NumberFormatInfo object and set several of its
// properties that control default integer formatting.
let provider = System.Globalization.NumberFormatInfo()
provider.NegativeSign <- "minus "

let values = [| -200; 0; 1000 |]

for value in values do
    printfn $"{value,-6}  -->  {Convert.ToString(value, provider),10}"
// The example displays the following output:
//       -200    -->   minus 200
//       0       -->           0
//       1000    -->        1000

' Create a NumberFormatInfo object and set several of its
' properties that control default integer formatting.
Dim provider As New System.Globalization.NumberFormatInfo()
provider.NegativeSign = "minus "

Dim values() As Long = { -200, 0, 1000 }

For Each value As Long In values
   Console.WriteLine("{0,-6}  -->  {1,10}", _
                     value, Convert.ToString(value, provider))
Next
' The example displays the following output:
'       -200    -->   minus 200
'       0       -->           0
'       1000    -->        1000

Remarques

Cette implémentation est identique à Int64.ToString().