String.Split Método

Referencia

Definición

Espacio de nombres:: System

Ensamblado:: System.Runtime.dll

Ensamblado:: netstandard.dll

Ensamblado:: mscorlib.dll

Importante

Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.

Devuelve una matriz de cadenas que contiene las subcadenas de esta instancia que están delimitadas por elementos de una cadena especificada o una matriz de caracteres Unicode.

Sobrecargas

Split(String, Int32, StringSplitOptions)	Divide una cadena en un número máximo de subcadenas basadas en una cadena delimitadora especificada y, opcionalmente, opciones.
Split(Char[], Int32, StringSplitOptions)	Divide una cadena en un número máximo de subcadenas basadas en caracteres delimitadores especificados y, opcionalmente, opciones.
Split(Char, Int32, StringSplitOptions)	Divide una cadena en un número máximo de subcadenas basadas en un carácter delimitador especificado y, opcionalmente, opciones. Divide una cadena en un número máximo de subcadenas en función del separador de caracteres proporcionado, omite opcionalmente las subcadenas vacías del resultado.
Split(String[], StringSplitOptions)	Divide una cadena en subcadenas en función de una cadena delimitadora especificada y, opcionalmente, opciones.
Split(String, StringSplitOptions)	Divide una cadena en subcadenas que se basan en el separador de cadena proporcionado.
Split(Char[])	Divide una cadena en subcadenas en función de los caracteres delimitadores especificados.
Split(Char[], Int32)	Divide una cadena en un número máximo de subcadenas basadas en caracteres delimitadores especificados.
Split(Char, StringSplitOptions)	Divide una cadena en subcadenas en función de un carácter delimitador especificado y, opcionalmente, las opciones.
Split(ReadOnlySpan<Char>)	Divide una cadena en subcadenas en función de los caracteres delimitadores especificados.
Split(String[], Int32, StringSplitOptions)	Divide una cadena en un número máximo de subcadenas basadas en cadenas delimitadas especificadas y, opcionalmente, opciones.
Split(Char[], StringSplitOptions)	Divide una cadena en subcadenas en función de los caracteres y opciones de delimitadores especificados.

Comentarios

Split se usa para dividir una cadena delimitada en subcadenas. Puede usar una matriz de caracteres o una matriz de cadenas para especificar cero o más caracteres o cadenas delimitadores. Si no se especifica ningún carácter delimitador, la cadena se divide en caracteres de espacio en blanco.

Las sobrecargas del método Split permiten limitar el número de subcadenas devueltas por el método (el método Split(Char[], Int32)), para especificar si se deben incluir cadenas vacías o subcadenas de recorte en el resultado (los métodos Split(Char[], StringSplitOptions) y Split(String[], StringSplitOptions)) o para hacerlo (los métodos Split(Char[], Int32, StringSplitOptions) y Split(String[], Int32, StringSplitOptions)).

Propina

El método Split no siempre es la mejor manera de dividir una cadena delimitada en subcadenas. Si no desea extraer todas las subcadenas de una cadena delimitada, o si desea analizar una cadena basada en un patrón en lugar de un conjunto de caracteres delimitadores, considere la posibilidad de usar expresiones regulares o combinar uno de los métodos de búsqueda que devuelven el índice de un carácter con el método Substring. Para obtener más información, vea Extraer subcadenas de una cadena.

Ejemplo

En los ejemplos siguientes se muestran tres sobrecargas diferentes de String.Split(). En el primer ejemplo se llama a la sobrecarga de Split(Char[]) y se pasa un único delimitador.

string s = "You win some. You lose some.";

string[] subs = s.Split(' ');

foreach (var sub in subs)
{
    Console.WriteLine($"Substring: {sub}");
}

// This example produces the following output:
//
// Substring: You
// Substring: win
// Substring: some.
// Substring: You
// Substring: lose
// Substring: some.

let s = "You win some. You lose some."

let subs = s.Split ' '

for sub in subs do
    printfn $"Substring: {sub}"

// This example produces the following output:
//
// Substring: You
// Substring: win
// Substring: some.
// Substring: You
// Substring: lose
// Substring: some.

Dim s As String = "You win some. You lose some."
Dim subs As String() = s.Split()

For Each substring As String In subs
    Console.WriteLine($"Substring: {substring}")
Next

' This example produces the following output:
'
' Substring: You
' Substring: win
' Substring: some.
' Substring: You
' Substring: lose
' Substring: some.

Como puede ver, los caracteres de punto (.) se incluyen en dos de las subcadenas. Si desea excluir los caracteres de punto, puede agregar el carácter de punto como un carácter delimitador adicional. En el ejemplo siguiente se muestra cómo hacerlo.

string s = "You win some. You lose some.";

string[] subs = s.Split(' ', '.');

foreach (var sub in subs)
{
    Console.WriteLine($"Substring: {sub}");
}

// This example produces the following output:
//
// Substring: You
// Substring: win
// Substring: some
// Substring:
// Substring: You
// Substring: lose
// Substring: some
// Substring:

let s = "You win some. You lose some."

let subs = s.Split(' ', '.')

for sub in subs do
    printfn $"Substring: {sub}"

// This example produces the following output:
//
// Substring: You
// Substring: win
// Substring: some
// Substring:
// Substring: You
// Substring: lose
// Substring: some
// Substring:

Dim s As String = "You win some. You lose some."
Dim subs As String() = s.Split(" "c, "."c)

For Each substring As String In subs
    Console.WriteLine($"Substring: {substring}")
Next

' This example produces the following output:
'
' Substring: You
' Substring: win
' Substring: some
' Substring:
' Substring: You
' Substring: lose
' Substring: some
' Substring:

Los períodos se han ido de las subcadenas, pero ahora se han incluido dos subcadenas vacías adicionales. Estas subcadenas vacías representan la subcadena entre una palabra y el punto siguiente. Para omitir subcadenas vacías de la matriz resultante, puede llamar a la sobrecarga de Split(Char[], StringSplitOptions) y especificar StringSplitOptions.RemoveEmptyEntries para el parámetro options.

string s = "You win some. You lose some.";
char[] separators = new char[] { ' ', '.' };

string[] subs = s.Split(separators, StringSplitOptions.RemoveEmptyEntries);

foreach (var sub in subs)
{
    Console.WriteLine($"Substring: {sub}");
}

// This example produces the following output:
//
// Substring: You
// Substring: win
// Substring: some
// Substring: You
// Substring: lose
// Substring: some

let s = "You win some. You lose some."
let separators = [| ' '; '.' |]

let subs = s.Split(separators, StringSplitOptions.RemoveEmptyEntries)

for sub in subs do
    printfn $"Substring: {sub}"

// This example produces the following output:
//
// Substring: You
// Substring: win
// Substring: some
// Substring: You
// Substring: lose
// Substring: some

Dim s As String = "You win some. You lose some."
Dim separators As Char() = New Char() {" "c, "."c}
Dim subs As String() = s.Split(separators, StringSplitOptions.RemoveEmptyEntries)

For Each substring As String In subs
    Console.WriteLine($"Substring: {substring}")
Next

' This example produces the following output:
'
' Substring: You
' Substring: win
' Substring: some
' Substring: You
' Substring: lose
' Substring: some

Las secciones de las sobrecargas individuales de String.Split() contienen otros ejemplos.

Split(String, Int32, StringSplitOptions)

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Divide una cadena en un número máximo de subcadenas basadas en una cadena delimitadora especificada y, opcionalmente, opciones.

public string[] Split (string? separator, int count, StringSplitOptions options = System.StringSplitOptions.None);

public string[] Split (string separator, int count, StringSplitOptions options = System.StringSplitOptions.None);

member this.Split : string * int * StringSplitOptions -> string[]

Public Function Split (separator As String, count As Integer, Optional options As StringSplitOptions = System.StringSplitOptions.None) As String()

Parámetros

separator: String

Cadena que delimita las subcadenas de esta instancia.

count: Int32

Número máximo de elementos esperados en la matriz.

options: StringSplitOptions

Combinación bit a bit de los valores de enumeración que especifica si se deben recortar subcadenas e incluir subcadenas vacías.

Devoluciones

String[]

Matriz que contiene como máximo count subcadenas de esta instancia delimitadas por separator.

Comentarios

Si la cadena ya se ha dividido count - 1 veces, pero no se ha alcanzado el final de la cadena, la última cadena de la matriz devuelta contendrá la subcadena final restante de esta instancia, sin modificar.

Se aplica a

Split(Char[], Int32, StringSplitOptions)

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Divide una cadena en un número máximo de subcadenas basadas en caracteres delimitadores especificados y, opcionalmente, opciones.

public:
 cli::array <System::String ^> ^ Split(cli::array <char> ^ separator, int count, StringSplitOptions options);

public string[] Split (char[] separator, int count, StringSplitOptions options);

public string[] Split (char[]? separator, int count, StringSplitOptions options);

[System.Runtime.InteropServices.ComVisible(false)]
public string[] Split (char[] separator, int count, StringSplitOptions options);

member this.Split : char[] * int * StringSplitOptions -> string[]

[<System.Runtime.InteropServices.ComVisible(false)>]
member this.Split : char[] * int * StringSplitOptions -> string[]

Public Function Split (separator As Char(), count As Integer, options As StringSplitOptions) As String()

Parámetros

separator: Char[]

Matriz de caracteres que delimitan las subcadenas de esta cadena, una matriz vacía que no contiene delimitadores ni null.

count: Int32

Número máximo de subcadenas que se van a devolver.

options: StringSplitOptions

Combinación bit a bit de los valores de enumeración que especifica si se deben recortar subcadenas e incluir subcadenas vacías.

Devoluciones

String[]

Matriz que contiene las subcadenas de esta cadena delimitadas por uno o varios caracteres en separator. Para obtener más información, vea la sección Comentarios.

Atributos: ComVisibleAttribute

Excepciones

ArgumentOutOfRangeException

count es negativo.

ArgumentException

options no es uno de los valores de StringSplitOptions.

Ejemplos

En el ejemplo siguiente se usa la enumeración StringSplitOptions para incluir o excluir subcadenas generadas por el método Split.

// This example demonstrates the String.Split(Char[], Boolean) and 
//                               String.Split(Char[], Int32, Boolean) methods
using namespace System;
void Show( array<String^>^entries )
{
   Console::WriteLine( "The return value contains these {0} elements:", entries->Length );
   System::Collections::IEnumerator^ myEnum = entries->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      String^ entry = safe_cast<String^>(myEnum->Current);
      Console::Write( "<{0}>", entry );
   }

   Console::Write( "{0}{0}", Environment::NewLine );
}

int main()
{
   String^ s = ",one,,,two,,,,,three,,";
   array<Char>^sep = gcnew array<Char>{
      ','
   };
   array<String^>^result;
   
   //
   Console::WriteLine( "The original string is \"{0}\".", s );
   Console::WriteLine( "The separation character is '{0}'.", sep[ 0 ] );
   Console::WriteLine();
   
   //
   Console::WriteLine( "Split the string and return all elements:" );
   result = s->Split( sep, StringSplitOptions::None );
   Show( result );
   
   //
   Console::WriteLine( "Split the string and return all non-empty elements:" );
   result = s->Split( sep, StringSplitOptions::RemoveEmptyEntries );
   Show( result );
   
   //
   Console::WriteLine( "Split the string and return 2 elements:" );
   result = s->Split( sep, 2, StringSplitOptions::None );
   Show( result );
   
   //
   Console::WriteLine( "Split the string and return 2 non-empty elements:" );
   result = s->Split( sep, 2, StringSplitOptions::RemoveEmptyEntries );
   Show( result );
}

/*
This example produces the following results:

The original string is ",one,,,two,,,,,three,,".
The separation character is ','.

Split the string and return all elements:
The return value contains these 12 elements:
<><one><><><two><><><><><three><><>

Split the string and return all non-empty elements:
The return value contains these 3 elements:
<one><two><three>

Split the string and return 2 elements:
The return value contains these 2 elements:
<><one,,,two,,,,,three,,>

Split the string and return 2 non-empty elements:
The return value contains these 2 elements:
<one><,,two,,,,,three,,>

*/

// This example demonstrates the String.Split() methods that use
// the StringSplitOptions enumeration.

// Example 1: Split a string delimited by characters
Console.WriteLine("1) Split a string delimited by characters:\n");

string s1 = ",ONE,, TWO,, , THREE,,";
char[] charSeparators = new char[] { ',' };
string[] result;

Console.WriteLine($"The original string is: \"{s1}\".");
Console.WriteLine($"The delimiter character is: '{charSeparators[0]}'.\n");

// Split the string and return all elements
Console.WriteLine("1a) Return all elements:");
result = s1.Split(charSeparators, StringSplitOptions.None);
Show(result);

// Split the string and return all elements with whitespace trimmed
Console.WriteLine("1b) Return all elements with whitespace trimmed:");
result = s1.Split(charSeparators, StringSplitOptions.TrimEntries);
Show(result);

// Split the string and return all non-empty elements
Console.WriteLine("1c) Return all non-empty elements:");
result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Split the string and return all non-whitespace elements with whitespace trimmed
Console.WriteLine("1d) Return all non-whitespace elements with whitespace trimmed:");
result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
Show(result);


// Split the string into only two elements, keeping the remainder in the last match
Console.WriteLine("1e) Split into only two elements:");
result = s1.Split(charSeparators, 2, StringSplitOptions.None);
Show(result);

// Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
Console.WriteLine("1f) Split into only two elements with whitespace trimmed:");
result = s1.Split(charSeparators, 2, StringSplitOptions.TrimEntries);
Show(result);

// Split the string into only two non-empty elements, keeping the remainder in the last match
Console.WriteLine("1g) Split into only two non-empty elements:");
result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
Console.WriteLine("1h) Split into only two non-whitespace elements with whitespace trimmed:");
result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
Show(result);


// Example 2: Split a string delimited by another string
Console.WriteLine("2) Split a string delimited by another string:\n");

string s2 = "[stop]" +
            "ONE[stop] [stop]" +
            "TWO  [stop][stop]  [stop]" +
            "THREE[stop][stop]  ";
string[] stringSeparators = new string[] { "[stop]" };

Console.WriteLine($"The original string is: \"{s2}\".");
Console.WriteLine($"The delimiter string is: \"{stringSeparators[0]}\".\n");

// Split the string and return all elements
Console.WriteLine("2a) Return all elements:");
result = s2.Split(stringSeparators, StringSplitOptions.None);
Show(result);

// Split the string and return all elements with whitespace trimmed
Console.WriteLine("2b) Return all elements with whitespace trimmed:");
result = s2.Split(stringSeparators, StringSplitOptions.TrimEntries);
Show(result);

// Split the string and return all non-empty elements
Console.WriteLine("2c) Return all non-empty elements:");
result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Split the string and return all non-whitespace elements with whitespace trimmed
Console.WriteLine("2d) Return all non-whitespace elements with whitespace trimmed:");
result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
Show(result);


// Split the string into only two elements, keeping the remainder in the last match
Console.WriteLine("2e) Split into only two elements:");
result = s2.Split(stringSeparators, 2, StringSplitOptions.None);
Show(result);

// Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
Console.WriteLine("2f) Split into only two elements with whitespace trimmed:");
result = s2.Split(stringSeparators, 2, StringSplitOptions.TrimEntries);
Show(result);

// Split the string into only two non-empty elements, keeping the remainder in the last match
Console.WriteLine("2g) Split into only two non-empty elements:");
result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
Console.WriteLine("2h) Split into only two non-whitespace elements with whitespace trimmed:");
result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
Show(result);


// Display the array of separated strings using a local function
void Show(string[] entries)
{
    Console.WriteLine($"The return value contains these {entries.Length} elements:");
    foreach (string entry in entries)
    {
        Console.Write($"<{entry}>");
    }
    Console.Write("\n\n");
}

/*
This example produces the following results:

1) Split a string delimited by characters:

The original string is: ",ONE,, TWO,, , THREE,,".
The delimiter character is: ','.

1a) Return all elements:
The return value contains these 9 elements:
<><ONE><>< TWO><>< >< THREE><><>

1b) Return all elements with whitespace trimmed:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

1c) Return all non-empty elements:
The return value contains these 4 elements:
<ONE>< TWO>< >< THREE>

1d) Return all non-whitespace elements with whitespace trimmed:
The return value contains these 3 elements:
<ONE><TWO><THREE>

1e) Split into only two elements:
The return value contains these 2 elements:
<><ONE,, TWO,, , THREE,,>

1f) Split into only two elements with whitespace trimmed:
The return value contains these 2 elements:
<><ONE,, TWO,, , THREE,,>

1g) Split into only two non-empty elements:
The return value contains these 2 elements:
<ONE>< TWO,, , THREE,,>

1h) Split into only two non-whitespace elements with whitespace trimmed:
The return value contains these 2 elements:
<ONE><TWO,, , THREE,,>

2) Split a string delimited by another string:

The original string is: "[stop]ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  ".
The delimiter string is: "[stop]".

2a) Return all elements:
The return value contains these 9 elements:
<><ONE>< ><TWO  ><><  ><THREE><><  >

2b) Return all elements with whitespace trimmed:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

2c) Return all non-empty elements:
The return value contains these 6 elements:
<ONE>< ><TWO  ><  ><THREE><  >

2d) Return all non-whitespace elements with whitespace trimmed:
The return value contains these 3 elements:
<ONE><TWO><THREE>

2e) Split into only two elements:
The return value contains these 2 elements:
<><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >

2f) Split into only two elements with whitespace trimmed:
The return value contains these 2 elements:
<><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]>

2g) Split into only two non-empty elements:
The return value contains these 2 elements:
<ONE>< [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >

2h) Split into only two non-whitespace elements with whitespace trimmed:
The return value contains these 2 elements:
<ONE><TWO  [stop][stop]  [stop]THREE[stop][stop]>

*/

// This example demonstrates the String.Split() methods that use
// the StringSplitOptions enumeration.

// Display the array of separated strings using a local function
let show  (entries: string[]) =
    printfn $"The return value contains these {entries.Length} elements:"
    for entry in entries do
        printf $"<{entry}>"
    printf "\n\n"

// Example 1: Split a string delimited by characters
printfn "1) Split a string delimited by characters:\n"

let s1 = ",ONE,, TWO,, , THREE,,"
let charSeparators = [| ',' |]

printfn $"The original string is: \"{s1}\"."
printfn $"The delimiter character is: '{charSeparators[0]}'.\n"

// Split the string and return all elements
printfn "1a) Return all elements:"
let result = s1.Split(charSeparators, StringSplitOptions.None)
show result

// Split the string and return all elements with whitespace trimmed
printfn "1b) Return all elements with whitespace trimmed:"
let result = s1.Split(charSeparators, StringSplitOptions.TrimEntries)
show result

// Split the string and return all non-empty elements
printfn "1c) Return all non-empty elements:"
let result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries)
show result

// Split the string and return all non-whitespace elements with whitespace trimmed
printfn "1d) Return all non-whitespace elements with whitespace trimmed:"
let result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries ||| StringSplitOptions.TrimEntries)
show result


// Split the string into only two elements, keeping the remainder in the last match
printfn "1e) Split into only two elements:"
let result = s1.Split(charSeparators, 2, StringSplitOptions.None)
show result

// Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
printfn "1f) Split into only two elements with whitespace trimmed:"
let result = s1.Split(charSeparators, 2, StringSplitOptions.TrimEntries)
show result

// Split the string into only two non-empty elements, keeping the remainder in the last match
printfn "1g) Split into only two non-empty elements:"
let result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
show result

// Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
printfn "1h) Split into only two non-whitespace elements with whitespace trimmed:"
let result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries ||| StringSplitOptions.TrimEntries)
show result


// Example 2: Split a string delimited by another string
printfn "2) Split a string delimited by another string:\n"

let s2 = "[stop]" +
            "ONE[stop] [stop]" +
            "TWO  [stop][stop]  [stop]" +
            "THREE[stop][stop]  "
let stringSeparators = [| "[stop]" |]

printfn $"The original string is: \"{s2}\"."
printfn $"The delimiter string is: \"{stringSeparators[0]}\".\n"

// Split the string and return all elements
printfn "2a) Return all elements:"
let result = s2.Split(stringSeparators, StringSplitOptions.None)
show result

// Split the string and return all elements with whitespace trimmed
printfn "2b) Return all elements with whitespace trimmed:"
let result = s2.Split(stringSeparators, StringSplitOptions.TrimEntries)
show result

// Split the string and return all non-empty elements
printfn "2c) Return all non-empty elements:"
let result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries)
show result

// Split the string and return all non-whitespace elements with whitespace trimmed
printfn "2d) Return all non-whitespace elements with whitespace trimmed:"
let result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries ||| StringSplitOptions.TrimEntries)
show result


// Split the string into only two elements, keeping the remainder in the last match
printfn "2e) Split into only two elements:"
let result = s2.Split(stringSeparators, 2, StringSplitOptions.None)
show result

// Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
printfn "2f) Split into only two elements with whitespace trimmed:"
let result = s2.Split(stringSeparators, 2, StringSplitOptions.TrimEntries)
show result

// Split the string into only two non-empty elements, keeping the remainder in the last match
printfn "2g) Split into only two non-empty elements:"
let result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
show result

// Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
printfn "2h) Split into only two non-whitespace elements with whitespace trimmed:"
let result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries ||| StringSplitOptions.TrimEntries)
show result

(*
This example produces the following results:

1) Split a string delimited by characters:

The original string is: ",ONE,, TWO,, , THREE,,".
The delimiter character is: ','.

1a) Return all elements:
The return value contains these 9 elements:
<><ONE><>< TWO><>< >< THREE><><>

1b) Return all elements with whitespace trimmed:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

1c) Return all non-empty elements:
The return value contains these 4 elements:
<ONE>< TWO>< >< THREE>

1d) Return all non-whitespace elements with whitespace trimmed:
The return value contains these 3 elements:
<ONE><TWO><THREE>

1e) Split into only two elements:
The return value contains these 2 elements:
<><ONE,, TWO,, , THREE,,>

1f) Split into only two elements with whitespace trimmed:
The return value contains these 2 elements:
<><ONE,, TWO,, , THREE,,>

1g) Split into only two non-empty elements:
The return value contains these 2 elements:
<ONE>< TWO,, , THREE,,>

1h) Split into only two non-whitespace elements with whitespace trimmed:
The return value contains these 2 elements:
<ONE><TWO,, , THREE,,>

2) Split a string delimited by another string:

The original string is: "[stop]ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  ".
The delimiter string is: "[stop]".

2a) Return all elements:
The return value contains these 9 elements:
<><ONE>< ><TWO  ><><  ><THREE><><  >

2b) Return all elements with whitespace trimmed:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

2c) Return all non-empty elements:
The return value contains these 6 elements:
<ONE>< ><TWO  ><  ><THREE><  >

2d) Return all non-whitespace elements with whitespace trimmed:
The return value contains these 3 elements:
<ONE><TWO><THREE>

2e) Split into only two elements:
The return value contains these 2 elements:
<><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >

2f) Split into only two elements with whitespace trimmed:
The return value contains these 2 elements:
<><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]>

2g) Split into only two non-empty elements:
The return value contains these 2 elements:
<ONE>< [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >

2h) Split into only two non-whitespace elements with whitespace trimmed:
The return value contains these 2 elements:
<ONE><TWO  [stop][stop]  [stop]THREE[stop][stop]>

*)

Public Shared Sub StringSplitOptionsExamples()
    ' This example demonstrates the String.Split() methods that use
    ' the StringSplitOptions enumeration.

    ' Example 1: Split a string delimited by characters
    Console.WriteLine("1) Split a string delimited by characters:" & vbCrLf)

    Dim s1 As String = ",ONE,, TWO,, , THREE,,"
    Dim charSeparators() As Char = {","c}
    Dim result() As String

    Console.WriteLine("The original string is: ""{0}"".", s1)
    Console.WriteLine("The delimiter character is: '{0}'." & vbCrLf, charSeparators(0))

    ' Split the string and return all elements
    Console.WriteLine("1a) Return all elements:")
    result = s1.Split(charSeparators, StringSplitOptions.None)
    Show(result)

    ' Split the string and return all elements with whitespace trimmed
    Console.WriteLine("1b) Return all elements with whitespace trimmed:")
    result = s1.Split(charSeparators, StringSplitOptions.TrimEntries)
    Show(result)

    ' Split the string and return all non-empty elements
    Console.WriteLine("1c) Return all non-empty elements:")
    result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' Split the string and return all non-whitespace elements with whitespace trimmed
    Console.WriteLine("1d) Return all non-whitespace elements with whitespace trimmed:")
    result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries Or StringSplitOptions.TrimEntries)
    Show(result)


    ' Split the string into only two elements, keeping the remainder in the last match
    Console.WriteLine("1e) Split into only two elements:")
    result = s1.Split(charSeparators, 2, StringSplitOptions.None)
    Show(result)

    ' Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
    Console.WriteLine("1f) Split into only two elements with whitespace trimmed:")
    result = s1.Split(charSeparators, 2, StringSplitOptions.TrimEntries)
    Show(result)

    ' Split the string into only two non-empty elements, keeping the remainder in the last match
    Console.WriteLine("1g) Split into only two non-empty elements:")
    result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
    Console.WriteLine("1h) Split into only two non-whitespace elements with whitespace trimmed:")
    result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries Or StringSplitOptions.TrimEntries)
    Show(result)


    ' Example 2: Split a string delimited by another string
    Console.WriteLine("2) Split a string delimited by another string:" & vbCrLf)

    Dim s2 As String = "[stop]" +
                "ONE[stop] [stop]" +
                "TWO  [stop][stop]  [stop]" +
                "THREE[stop][stop]  "
    Dim stringSeparators() As String = {"[stop]"}


    Console.WriteLine("The original string is: ""{0}"".", s2)
    Console.WriteLine("The delimiter string is: ""{0}""." & vbCrLf, stringSeparators(0))

    ' Split the string and return all elements
    Console.WriteLine("2a) Return all elements:")
    result = s2.Split(stringSeparators, StringSplitOptions.None)
    Show(result)

    ' Split the string and return all elements with whitespace trimmed
    Console.WriteLine("2b) Return all elements with whitespace trimmed:")
    result = s2.Split(stringSeparators, StringSplitOptions.TrimEntries)
    Show(result)

    ' Split the string and return all non-empty elements
    Console.WriteLine("2c) Return all non-empty elements:")
    result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' Split the string and return all non-whitespace elements with whitespace trimmed
    Console.WriteLine("2d) Return all non-whitespace elements with whitespace trimmed:")
    result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries Or StringSplitOptions.TrimEntries)
    Show(result)


    ' Split the string into only two elements, keeping the remainder in the last match
    Console.WriteLine("2e) Split into only two elements:")
    result = s2.Split(stringSeparators, 2, StringSplitOptions.None)
    Show(result)

    ' Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
    Console.WriteLine("2f) Split into only two elements with whitespace trimmed:")
    result = s2.Split(stringSeparators, 2, StringSplitOptions.TrimEntries)
    Show(result)

    ' Split the string into only two non-empty elements, keeping the remainder in the last match
    Console.WriteLine("2g) Split into only two non-empty elements:")
    result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
    Console.WriteLine("2h) Split into only two non-whitespace elements with whitespace trimmed:")
    result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries Or StringSplitOptions.TrimEntries)
    Show(result)

End Sub

' Display the array of separated strings.
Public Shared Sub Show(ByVal entries() As String)
    Console.WriteLine("The return value contains these {0} elements:", entries.Length)
    Dim entry As String
    For Each entry In entries
        Console.Write("<{0}>", entry)
    Next entry
    Console.Write(vbCrLf & vbCrLf)

End Sub

'This example produces the following results:
'
' 1) Split a string delimited by characters:
'
' The original string is: ",ONE,, TWO,, , THREE,,".
' The delimiter character is: ','.
'
' 1a) Return all elements:
' The return value contains these 9 elements:
' <><ONE><>< TWO><>< >< THREE><><>
'
' 1b) Return all elements with whitespace trimmed:
' The return value contains these 9 elements:
' <><ONE><><TWO><><><THREE><><>
'
' 1c) Return all non-empty elements:
' The return value contains these 4 elements:
' <ONE>< TWO>< >< THREE>
'
' 1d) Return all non-whitespace elements with whitespace trimmed:
' The return value contains these 3 elements:
' <ONE><TWO><THREE>
'
' 1e) Split into only two elements:
' The return value contains these 2 elements:
' <><ONE,, TWO,, , THREE,,>
'
' 1f) Split into only two elements with whitespace trimmed:
' The return value contains these 2 elements:
' <><ONE,, TWO,, , THREE,,>
'
' 1g) Split into only two non-empty elements:
' The return value contains these 2 elements:
' <ONE>< TWO,, , THREE,,>
'
' 1h) Split into only two non-whitespace elements with whitespace trimmed:
' The return value contains these 2 elements:
' <ONE><TWO,, , THREE,,>
'
' 2) Split a string delimited by another string:
'
' The original string is: "[stop]ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  ".
' The delimiter string is: "[stop]".
'
' 2a) Return all elements:
' The return value contains these 9 elements:
' <><ONE>< ><TWO  ><><  ><THREE><><  >
'
' 2b) Return all elements with whitespace trimmed:
' The return value contains these 9 elements:
' <><ONE><><TWO><><><THREE><><>
'
' 2c) Return all non-empty elements:
' The return value contains these 6 elements:
' <ONE>< ><TWO  ><  ><THREE><  >
'
' 2d) Return all non-whitespace elements with whitespace trimmed:
' The return value contains these 3 elements:
' <ONE><TWO><THREE>
'
' 2e) Split into only two elements:
' The return value contains these 2 elements:
' <><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >
'
' 2f) Split into only two elements with whitespace trimmed:
' The return value contains these 2 elements:
' <><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]>
'
' 2g) Split into only two non-empty elements:
' The return value contains these 2 elements:
' <ONE>< [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >
'
' 2h) Split into only two non-whitespace elements with whitespace trimmed:
' The return value contains these 2 elements:
' <ONE><TWO  [stop][stop]  [stop]THREE[stop][stop]>
'

Comentarios

Los caracteres delimitadores no se incluyen en los elementos de la matriz devuelta.

Si esta instancia no contiene ninguno de los caracteres de separator, o el parámetro count es 1, la matriz devuelta consta de un único elemento que contiene esta instancia.

Si el parámetro separator es null o no contiene caracteres, se supone que los caracteres de espacio en blanco son los delimitadores. Los caracteres de espacio en blanco se definen mediante el estándar Unicode y el método Char.IsWhiteSpace devuelve true si se le pasan.

Para pasar null para el parámetro char[] separator, debe indicar el tipo del null para desambiguar la llamada de otras sobrecargas, como Split(String[], Int32, StringSplitOptions). En el ejemplo siguiente se muestran varias maneras de identificar esta sobrecarga de forma inequívoca.

string phrase = "The quick  brown fox";

_ = phrase.Split(default(char[]), 3, StringSplitOptions.RemoveEmptyEntries);

_ = phrase.Split((char[]?)null, 3, StringSplitOptions.RemoveEmptyEntries);

_ = phrase.Split(null as char[], 3, StringSplitOptions.RemoveEmptyEntries);

let phrase = "The quick  brown fox"

phrase.Split(Unchecked.defaultof<char[]>, 3, StringSplitOptions.RemoveEmptyEntries) |> ignore

phrase.Split(null :> char[], 3, StringSplitOptions.RemoveEmptyEntries) |> ignore

phrase.Split((null: char[]), 3, StringSplitOptions.RemoveEmptyEntries) |> ignore

Dim phrase As String = "The quick brown fox"
Dim words() As String

words = phrase.Split(TryCast(Nothing, Char()), 3,
                       StringSplitOptions.RemoveEmptyEntries)

words = phrase.Split(New Char() {}, 3,
                     StringSplitOptions.RemoveEmptyEntries)

Si el parámetro count es cero o el parámetro options es RemoveEmptyEntries y la longitud de esta instancia es cero, se devuelve una matriz vacía.

Cada elemento de separator define un carácter delimitador independiente. Si el parámetro options es Noney dos delimitadores son adyacentes o se encuentra un delimitador al principio o al final de esta instancia, el elemento de matriz correspondiente contiene Empty.

Si hay más de count subcadenas en esta instancia, los primeros count menos 1 subcadenas se devuelven en el primer count menos 1 elementos del valor devuelto y los caracteres restantes de esta instancia se devuelven en el último elemento del valor devuelto.

Si count es mayor que el número de subcadenas, se devuelven las subcadenas disponibles y no se produce ninguna excepción.

Consideraciones sobre el rendimiento

Los métodos Split asignan memoria para el objeto de matriz devuelto y un objeto String para cada elemento de matriz. Si la aplicación requiere un rendimiento óptimo o si la administración de la asignación de memoria es fundamental en la aplicación, considere la posibilidad de usar el método IndexOf o IndexOfAny y, opcionalmente, el método Compare, para buscar una subcadena dentro de una cadena.

Si va a dividir una cadena en un carácter separador, use el método IndexOf o IndexOfAny para buscar un carácter separador en la cadena. Si va a dividir una cadena en una cadena separadora, use el método IndexOf o IndexOfAny para buscar el primer carácter de la cadena separadora. A continuación, use el método Compare para determinar si los caracteres después de ese primer carácter son iguales a los caracteres restantes de la cadena separadora.

Además, si se usa el mismo conjunto de caracteres para dividir cadenas en varias llamadas de método Split, considere la posibilidad de crear una sola matriz y hacer referencia a ella en cada llamada de método. Esto reduce significativamente la sobrecarga adicional de cada llamada al método.

Notas a los autores de las llamadas

En .NET Framework 3.5 y versiones anteriores, si el método Split(Char[]) se pasa un separator que es null o no contiene caracteres, el método usa un conjunto ligeramente diferente de caracteres de espacio en blanco para dividir la cadena que el método Trim(Char[]) hace para recortar la cadena. A partir de .NET Framework 4, ambos métodos usan un conjunto idéntico de caracteres de espacio en blanco Unicode.

Se aplica a

Split(Char, Int32, StringSplitOptions)

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Divide una cadena en un número máximo de subcadenas basadas en un carácter delimitador especificado y, opcionalmente, opciones. Divide una cadena en un número máximo de subcadenas en función del separador de caracteres proporcionado, omite opcionalmente las subcadenas vacías del resultado.

public string[] Split (char separator, int count, StringSplitOptions options = System.StringSplitOptions.None);

member this.Split : char * int * StringSplitOptions -> string[]

Public Function Split (separator As Char, count As Integer, Optional options As StringSplitOptions = System.StringSplitOptions.None) As String()

Parámetros

separator: Char

Carácter que delimita las subcadenas de esta instancia.

count: Int32

Número máximo de elementos esperados en la matriz.

options: StringSplitOptions

Combinación bit a bit de los valores de enumeración que especifica si se deben recortar subcadenas e incluir subcadenas vacías.

Devoluciones

String[]

Matriz que contiene como máximo count subcadenas de esta instancia delimitadas por separator.

Comentarios

Se aplica a

Split(String[], StringSplitOptions)

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Divide una cadena en subcadenas en función de una cadena delimitadora especificada y, opcionalmente, opciones.

public:
 cli::array <System::String ^> ^ Split(cli::array <System::String ^> ^ separator, StringSplitOptions options);

public string[] Split (string[] separator, StringSplitOptions options);

public string[] Split (string[]? separator, StringSplitOptions options);

[System.Runtime.InteropServices.ComVisible(false)]
public string[] Split (string[] separator, StringSplitOptions options);

member this.Split : string[] * StringSplitOptions -> string[]

[<System.Runtime.InteropServices.ComVisible(false)>]
member this.Split : string[] * StringSplitOptions -> string[]

Public Function Split (separator As String(), options As StringSplitOptions) As String()

Parámetros

separator: String[]

Matriz de cadenas que delimitan las subcadenas de esta cadena, una matriz vacía que no contiene delimitadores ni null.

options: StringSplitOptions

Combinación bit a bit de los valores de enumeración que especifica si se deben recortar subcadenas e incluir subcadenas vacías.

Devoluciones

String[]

Matriz cuyos elementos contienen las subcadenas de esta cadena delimitadas por una o varias cadenas de separator. Para obtener más información, vea la sección Comentarios.

Atributos: ComVisibleAttribute

Excepciones

ArgumentException

options no es uno de los valores de StringSplitOptions.

Ejemplos

En el ejemplo siguiente se muestra la diferencia en las matrices devueltas llamando al método String.Split(String[], StringSplitOptions) de una cadena con su parámetro options igual a StringSplitOptions.None y StringSplitOptions.RemoveEmptyEntries.

string source = "[stop]ONE[stop][stop]TWO[stop][stop][stop]THREE[stop][stop]";
string[] stringSeparators = new string[] { "[stop]" };
string[] result;

// Display the original string and delimiter string.
Console.WriteLine($"Splitting the string:\n   \"{source}\".");
Console.WriteLine();
Console.WriteLine($"Using the delimiter string:\n   \"{stringSeparators[0]}\"");
Console.WriteLine();

// Split a string delimited by another string and return all elements.
result = source.Split(stringSeparators, StringSplitOptions.None);
Console.WriteLine($"Result including all elements ({result.Length} elements):");
Console.Write("   ");
foreach (string s in result)
{
    Console.Write("'{0}' ", String.IsNullOrEmpty(s) ? "<>" : s);
}
Console.WriteLine();
Console.WriteLine();

// Split delimited by another string and return all non-empty elements.
result = source.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries);
Console.WriteLine($"Result including non-empty elements ({result.Length} elements):");
Console.Write("   ");
foreach (string s in result)
{
    Console.Write("'{0}' ", String.IsNullOrEmpty(s) ? "<>" : s);
}
Console.WriteLine();

// The example displays the following output:
//    Splitting the string:
//       "[stop]ONE[stop][stop]TWO[stop][stop][stop]THREE[stop][stop]".
//
//    Using the delimiter string:
//       "[stop]"
//
//    Result including all elements (9 elements):
//       '<>' 'ONE' '<>' 'TWO' '<>' '<>' 'THREE' '<>' '<>'
//
//    Result including non-empty elements (3 elements):
//       'ONE' 'TWO' 'THREE'

let source = "[stop]ONE[stop][stop]TWO[stop][stop][stop]THREE[stop][stop]"
let stringSeparators = [| "[stop]" |]

// Display the original string and delimiter string.
printfn $"Splitting the string:\n   \"{source}\".\n"
printfn $"Using the delimiter string:\n   \"{stringSeparators[0]}\"\n"

// Split a string delimited by another string and return all elements.
let result = source.Split(stringSeparators, StringSplitOptions.None)
printfn $"Result including all elements ({result.Length} elements):"
printf "   "
for s in result do
    printf $"""'{if String.IsNullOrEmpty s then "<>" else s}' """
printfn "\n"

// Split delimited by another string and return all non-empty elements.
let result = source.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries)
Console.WriteLine($"Result including non-empty elements ({result.Length} elements):")
printf "   "
for s in result do
    printf $"""'{if String.IsNullOrEmpty s then "<>" else s}' """
printfn ""

// The example displays the following output:
//    Splitting the string:
//       "[stop]ONE[stop][stop]TWO[stop][stop][stop]THREE[stop][stop]".
//
//    Using the delimiter string:
//       "[stop]"
//
//    let result including all elements (9 elements):
//       '<>' 'ONE' '<>' 'TWO' '<>' '<>' 'THREE' '<>' '<>'
//
//    let result including non-empty elements (3 elements):
//       'ONE' 'TWO' 'THREE'

Dim source As String = "[stop]ONE[stop][stop]TWO[stop][stop][stop]THREE[stop][stop]"
Dim stringSeparators() As String = {"[stop]"}
Dim result() As String

' Display the original string and delimiter string.
Console.WriteLine("Splitting the string:{0}   '{1}'.", vbCrLf, source)
Console.WriteLine()
Console.WriteLine("Using the delimiter string:{0}   '{1}'.",
                vbCrLf, stringSeparators(0))
Console.WriteLine()

' Split a string delimited by another string and return all elements.
result = source.Split(stringSeparators, StringSplitOptions.None)
Console.WriteLine("Result including all elements ({0} elements):",
                result.Length)
Console.Write("   ")
For Each s As String In result
    Console.Write("'{0}' ", IIf(String.IsNullOrEmpty(s), "<>", s))
Next
Console.WriteLine()
Console.WriteLine()

' Split delimited by another string and return all non-empty elements.
result = source.Split(stringSeparators,
                    StringSplitOptions.RemoveEmptyEntries)
Console.WriteLine("Result including non-empty elements ({0} elements):",
                result.Length)
Console.Write("   ")
For Each s As String In result
    Console.Write("'{0}' ", IIf(String.IsNullOrEmpty(s), "<>", s))
Next
Console.WriteLine()

' The example displays the following output:
'    Splitting the string:
'       "[stop]ONE[stop][stop]TWO[stop][stop][stop]THREE[stop][stop]".
'    
'    Using the delimiter string:
'       "[stop]"
'    
'    Result including all elements (9 elements):
'       '<>' 'ONE' '<>' 'TWO' '<>' '<>' 'THREE' '<>' '<>'
'    
'    Result including non-empty elements (3 elements):
'       'ONE' 'TWO' 'THREE'

En el ejemplo siguiente se define una matriz de separadores que incluyen signos de puntuación y caracteres de espacio en blanco. Pasar esta matriz junto con un valor de StringSplitOptions.RemoveEmptyEntries al método Split(String[], StringSplitOptions) devuelve una matriz que consta de las palabras individuales de la cadena.

string[] separators = { ",", ".", "!", "?", ";", ":", " " };
string value = "The handsome, energetic, young dog was playing with his smaller, more lethargic litter mate.";
string[] words = value.Split(separators, StringSplitOptions.RemoveEmptyEntries);
foreach (var word in words)
    Console.WriteLine(word);

// The example displays the following output:
//       The
//       handsome
//       energetic
//       young
//       dog
//       was
//       playing
//       with
//       his
//       smaller
//       more
//       lethargic
//       litter
//       mate

let separators = [| ","; "."; "!"; "?"; ""; ":"; " " |]
let value = "The handsome, energetic, young dog was playing with his smaller, more lethargic litter mate."
let words = value.Split(separators, StringSplitOptions.RemoveEmptyEntries)
for word in words do
    printfn $"${word}"

// The example displays the following output:
//       The
//       handsome
//       energetic
//       young
//       dog
//       was
//       playing
//       with
//       his
//       smaller
//       more
//       lethargic
//       litter
//       mate

    Dim separators() As String = {",", ".", "!", "?", ";", ":", " "}
    Dim value As String = "The handsome, energetic, young dog was playing with his smaller, more lethargic litter mate."
    Dim words() As String = value.Split(separators, StringSplitOptions.RemoveEmptyEntries)
    For Each word In words
        Console.WriteLine(word)
    Next
End Sub

' The example displays the following output:
'
'       The
'       handsome
'       energetic
'       young
'       dog
'       was
'       playing
'       with
'       his
'       smaller
'       more
'       lethargic
'       litter
'       mate

Tenga en cuenta que se llama al método con el argumento options establecido en StringSplitOptions.RemoveEmptyEntries. Esto evita que la matriz devuelta incluya String.Empty valores que representan coincidencias de subcadena vacías entre signos de puntuación y caracteres de espacio en blanco.

Comentarios

Cuando un conjunto conocido de cadenas delimita una cadena, puede usar el método Split para separarla en subcadenas.

Las cadenas delimitadores no se incluyen en los elementos de la matriz devuelta. Por ejemplo, si la matriz de separator incluye la cadena "--" y el valor de la instancia de cadena actual es "aa--bb--cc", el método devuelve una matriz que contiene tres elementos: "aa", "bb" y "cc".

Si esta instancia no contiene ninguna de las cadenas de separator, la matriz devuelta consta de un único elemento que contiene esta instancia.

Si el parámetro options es RemoveEmptyEntries y la longitud de esta instancia es cero, el método devuelve una matriz vacía.

Cada elemento de separator define un delimitador independiente que consta de uno o varios caracteres. Si el argumento options es None, y dos delimitadores son adyacentes o se encuentra un delimitador al principio o al final de esta instancia, el elemento de matriz correspondiente contiene String.Empty. Por ejemplo, si separator incluye dos elementos, "-" y "_", el valor de la instancia de cadena es "-_aa-_" y el valor del argumento options es None, el método devuelve una matriz de cadenas con los cinco elementos siguientes:

String.Empty, que representa la cadena vacía que precede a la subcadena "-" en el índice 0.
String.Empty, que representa la cadena vacía entre la subcadena "-" en el índice 0 y la subcadena "_" en el índice 1.
"aa".
String.Empty, que representa la cadena vacía que sigue a la subcadena "-" en el índice 4.
String.Empty, que representa la cadena vacía que sigue a la subcadena "_" en el índice 5.

Matriz separadora

Si alguno de los elementos de separator consta de varios caracteres, toda la subcadena se considera un delimitador. Por ejemplo, si uno de los elementos de separator es "10", intenta dividir la cadena "This10is10a10string". devuelve la matriz de cuatro elementos siguiente: { "This", "is", "a", "string". }.

Si el parámetro separator es null o no contiene cadenas no vacías, se supone que los caracteres de espacio en blanco son los delimitadores. Los caracteres de espacio en blanco se definen mediante el estándar Unicode y el método Char.IsWhiteSpace devuelve true si se le pasan.

Para pasar null para el parámetro string[] separator, debe indicar el tipo del null para desambiguar la llamada de otras sobrecargas, como Split(Char[], StringSplitOptions). En el ejemplo siguiente se muestran varias maneras de identificar esta sobrecarga de forma inequívoca.

string phrase = "The quick  brown fox";

_ = phrase.Split(default(string[]), StringSplitOptions.RemoveEmptyEntries);

_ = phrase.Split((string[]?)null, StringSplitOptions.RemoveEmptyEntries);

_ = phrase.Split(null as string[], StringSplitOptions.RemoveEmptyEntries);

let phrase = "The quick  brown fox"

phrase.Split(Unchecked.defaultof<string[]>, StringSplitOptions.RemoveEmptyEntries) |> ignore

phrase.Split(null :> string[], StringSplitOptions.RemoveEmptyEntries) |> ignore

phrase.Split((null: string[]), StringSplitOptions.RemoveEmptyEntries) |> ignore

Dim phrase As String = "The quick brown fox"
Dim words() As String

words = phrase.Split(TryCast(Nothing, String()),
                       StringSplitOptions.RemoveEmptyEntries)

words = phrase.Split(New String() {},
                     StringSplitOptions.RemoveEmptyEntries)

Detalles de comparación

El método Split extrae las subcadenas de esta cadena delimitadas por una o varias de las cadenas del parámetro separator y devuelve esas subcadenas como elementos de una matriz.

El método Split busca delimitadores mediante comparaciones mediante reglas de ordenación ordinal que distinguen mayúsculas de minúsculas. Para obtener más información sobre las ordenación de palabras, cadenas y ordinales, consulte la enumeración System.Globalization.CompareOptions.

El método Split omite cualquier elemento de separator cuyo valor es null o la cadena vacía ("").

Para evitar resultados ambiguos cuando las cadenas de separator tienen caracteres en común, la operación de Split continúa desde el principio hasta el final del valor de la instancia y coincide con el primer elemento de separator que es igual a un delimitador en la instancia. El orden en el que se encuentran subcadenas en la instancia tiene prioridad sobre el orden de los elementos de separator.

Por ejemplo, considere una instancia cuyo valor es "abcdef". Si el primer elemento de separator era "ef" y el segundo elemento era "bcde", el resultado de la operación de división sería una matriz de cadenas que contiene dos elementos, "a" y "f". Esto se debe a que la subcadena de la instancia de , "bcde", se encuentra y coincide con un elemento de separator antes de que se encuentre la subcadena "f".

Sin embargo, si el primer elemento de separator era "bcd" y el segundo elemento era "bc", el resultado de la operación de división sería una matriz de cadenas que contiene dos elementos, "a" y "ef". Esto se debe a que "bcd" es el primer delimitador de separator que coincide con un delimitador en la instancia de . Si el orden de los separadores se invertía para que el primer elemento fuera "bc" y el segundo elemento fuera "bcd", el resultado sería una matriz de cadenas que contiene dos elementos, "a" y "def".

Consideraciones sobre el rendimiento

Notas a los autores de las llamadas

Se aplica a

Split(String, StringSplitOptions)

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Divide una cadena en subcadenas que se basan en el separador de cadena proporcionado.

public string[] Split (string? separator, StringSplitOptions options = System.StringSplitOptions.None);

public string[] Split (string separator, StringSplitOptions options = System.StringSplitOptions.None);

member this.Split : string * StringSplitOptions -> string[]

Public Function Split (separator As String, Optional options As StringSplitOptions = System.StringSplitOptions.None) As String()

Parámetros

separator: String

Cadena que delimita las subcadenas de esta cadena.

options: StringSplitOptions

Combinación bit a bit de los valores de enumeración que especifica si se deben recortar subcadenas e incluir subcadenas vacías.

Devoluciones

String[]

Matriz cuyos elementos contienen las subcadenas de esta instancia delimitadas por separator.

Se aplica a

Split(Char[])

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Divide una cadena en subcadenas en función de los caracteres delimitadores especificados.

public:
 cli::array <System::String ^> ^ Split(... cli::array <char> ^ separator);

public string[] Split (params char[] separator);

public string[] Split (params char[]? separator);

member this.Split : char[] -> string[]

Public Function Split (ParamArray separator As Char()) As String()

Parámetros

separator: Char[]

Matriz de caracteres delimitadores, una matriz vacía que no contiene delimitadores ni null.

Devoluciones

String[]

Matriz cuyos elementos contienen las subcadenas de esta instancia delimitadas por uno o varios caracteres en separator. Para obtener más información, vea la sección Comentarios.

Ejemplos

En el ejemplo siguiente se muestra cómo extraer palabras individuales de un bloque de texto tratando el carácter de espacio ( ) y el carácter de tabulación (\t) como delimitadores. La cadena que se divide incluye ambos caracteres.

string s = "Today\tI'm going to school";
string[] subs = s.Split(' ', '\t');

foreach (var sub in subs)
{
    Console.WriteLine($"Substring: {sub}");
}

// This example produces the following output:
//
// Substring: Today
// Substring: I'm
// Substring: going
// Substring: to
// Substring: school

let s = "Today\tI'm going to school"
let subs = s.Split(' ', '\t')

for sub in subs do
    printfn $"Substring: {sub}"

// This example produces the following output:
//
// Substring: Today
// Substring: I'm
// Substring: going
// Substring: to
// Substring: school

Dim s As String = "Today" & vbTab & "I'm going to school"
Dim subs As String() = s.Split(" "c, Char.Parse(vbTab))

For Each substring In subs
    Console.WriteLine("Substring: " & substring)
Next

' This example produces the following output:
'
' Substring: Today
' Substring: I 'm
' Substring: going
' Substring: to
' Substring: school

Comentarios

Cuando un conjunto conocido de caracteres delimita una cadena, puede usar el método Split(Char[]) para separarla en subcadenas.

Los caracteres delimitadores no se incluyen en los elementos de la matriz devuelta. Por ejemplo, si la matriz separadora incluye el carácter "-" y el valor de la instancia de cadena actual es "aa-bb-cc", el método devuelve una matriz que contiene tres elementos: "aa", "bb" y "cc".

Si esta instancia no contiene ninguno de los caracteres de separator, la matriz devuelta consta de un único elemento que contiene esta instancia.

Cada elemento de separator define un carácter delimitador independiente. Si dos delimitadores son adyacentes o se encuentra un delimitador al principio o al final de esta instancia, el elemento correspondiente de la matriz devuelta contiene Empty.

En la tabla siguiente se muestran algunos ejemplos.

Idioma	Valor de cadena	Separador	Matriz devuelta
C#	"42, 12, 19"	new Char[] {',', ' '}	{"42", "", "12", "", "19"}
Visual Basic	"42, 12, 19"	Char() = {","c, " "c})	{"42", "", "12", "", "19"}
C#	"42..12..19."	new Char[] {'.'}	{"42", "", "12", "", "19", ""}
Visual Basic	"42..12..19."	Char() = {"." c}	{"42", "", "12", "", "19", ""}
C#	"Banana"	new Char[] {'.'}	{"Banana"}
Visual Basic	"Banana"	Char() = {"." c}	{"Banana"}
C#	"Darb\nSmarba"	new Char[] {}	{"Darb", "Smarba"}
Visual Basic	"Darb" & vbLf & "Smarba"	Char() = {}	{"Darb", "Smarba"}
C#	"Darb\nSmarba"	nulo	{"Darb", "Smarba"}
Visual Basic	"Darb" & vbLf & "Smarba"	Nada	{"Darb", "Smarba"}

Matriz separadora

Cada elemento del separador define un delimitador independiente que consta de un solo carácter.

Si el argumento separator es null o no contiene caracteres, el método trata los caracteres de espacio en blanco como delimitadores. Los caracteres de espacio en blanco se definen mediante el estándar Unicode y el método Char.IsWhiteSpace devuelve true si se le pasa un carácter de espacio en blanco.

String.Split(Char[]) y resolución de sobrecarga del compilador

Aunque el único parámetro para esta sobrecarga de String.Split es una matriz de caracteres, puede llamarlo con un solo carácter, como se muestra en el ejemplo siguiente.

string value = "This is a short string.";
char delimiter = 's';
string[] substrings = value.Split(delimiter);
foreach (var substring in substrings)
    Console.WriteLine(substring);

// The example displays the following output:
//     Thi
//      i
//      a
//     hort
//     tring.

let value = "This is a short string."
let delimiter = 's'
let substrings = value.Split delimiter
for substring in substrings do
    printfn $"{substring}"

// The example displays the following output:
//     Thi
//      i
//      a
//     hort
//     tring.

    Dim value As String = "This is a short string."
    Dim delimiter As Char = "s"c
    Dim substrings() As String = value.Split(delimiter)
    For Each substring In substrings
        Console.WriteLine(substring)
    Next
End Sub

' The example displays the following output:
'
'     Thi
'      i
'      a
'     hort
'     tring.

Dado que el parámetro separator está decorado con el atributo ParamArrayAttribute, los compiladores interpretarán un solo carácter como una matriz de caracteres de un solo elemento. Este no es el caso de otras sobrecargas de String.Split que incluyen un parámetro separator; Debe pasar explícitamente estas sobrecargas a una matriz de caracteres como argumento separator.

Detalles de comparación

El método Split(Char[]) extrae las subcadenas de esta cadena delimitadas por uno o varios de los caracteres de la matriz separator y devuelve esas subcadenas como elementos de una matriz.

El método Split(Char[]) busca delimitadores mediante comparaciones mediante reglas de ordenación ordinal que distinguen mayúsculas de minúsculas. Para obtener más información sobre las ordenación de palabras, cadenas y ordinales, consulte la enumeración System.Globalization.CompareOptions.

Consideraciones sobre el rendimiento

Los métodos Split asignan memoria para el objeto de matriz devuelto y un objeto String para cada elemento de matriz. Si la aplicación requiere un rendimiento óptimo o si la administración de la asignación de memoria es fundamental en la aplicación, considere la posibilidad de usar el método IndexOf o IndexOfAny. También tiene la opción de usar el método Compare para buscar una subcadena dentro de una cadena.

Para dividir una cadena en un carácter separador, use el método IndexOf o IndexOfAny para buscar un carácter separador en la cadena. Para dividir una cadena en una cadena separadora, use el método IndexOf o IndexOfAny para buscar el primer carácter de la cadena separadora. A continuación, use el método Compare para determinar si los caracteres después de ese primer carácter son iguales a los caracteres restantes de la cadena separadora.

Notas a los autores de las llamadas

Consulte también

Se aplica a

Split(Char[], Int32)

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Divide una cadena en un número máximo de subcadenas basadas en caracteres delimitadores especificados.

public:
 cli::array <System::String ^> ^ Split(cli::array <char> ^ separator, int count);

public string[] Split (char[] separator, int count);

public string[] Split (char[]? separator, int count);

member this.Split : char[] * int -> string[]

Public Function Split (separator As Char(), count As Integer) As String()

Parámetros

separator: Char[]

Matriz de caracteres que delimitan las subcadenas de esta cadena, una matriz vacía que no contiene delimitadores ni null.

count: Int32

Número máximo de subcadenas que se van a devolver.

Devoluciones

String[]

Matriz cuyos elementos contienen las subcadenas de esta instancia delimitadas por uno o varios caracteres en separator. Para obtener más información, vea la sección Comentarios.

Excepciones

ArgumentOutOfRangeException

count es negativo.

Ejemplos

En el ejemplo siguiente se muestra cómo se puede usar count para limitar el número de cadenas devueltas por Split.

string name = "Alex Johnson III";

string[] subs = name.Split(null, 2);

string firstName = subs[0];
string lastName;
if (subs.Length > 1)
{
    lastName = subs[1];
}

// firstName = "Alex"
// lastName = "Johnson III"

let name = "Alex Johnson III"

let subs = name.Split(null, 2)

let firstName = subs[0]
let lastName =
    if subs.Length > 1 then
        subs[1]
    else
        ""

// firstName = "Alex"
// lastName = "Johnson III"

Console.WriteLine("What is your name?")
Dim name As String = Console.ReadLine()

Dim substrings = name.Split(" "c, count:=2)
Dim firstName As String = substrings(0)
Dim lastName As String

If substrings.Length > 1 Then
    lastName = substrings(1)
End If

Console.WriteLine("firstName = ""{0}""", firstName)
Console.WriteLine("lastName = ""{0}""", lastName)

' If the user enters "Alex Johnson III":
' firstName = "Alex"
' lastName = "Johnson III"

Comentarios

Los caracteres delimitadores no se incluyen en los elementos de la matriz devuelta.

Si esta instancia no contiene ninguno de los caracteres de separator, la matriz devuelta consta de un único elemento que contiene esta instancia. Si count es cero, se devuelve una matriz vacía.

Si hay más de count subcadenas en esta instancia, las primeras count - 1 subcadenas se devuelven en los primeros elementos count - 1 del valor devuelto y los caracteres restantes de esta instancia se devuelven en el último elemento del valor devuelto.

Si count es mayor que el número de subcadenas, se devuelven las subcadenas disponibles y no se produce ninguna excepción.

En la tabla siguiente se muestran algunos ejemplos.

Idioma	Valor de cadena	Separador	Matriz devuelta
C#	"42, 12, 19"	new Char[] {',', ' '}	{"42", "", "12", "", "19"}
Visual Basic	"42, 12, 19"	Char() = {","c, " "c})	{"42", "", "12", "", "19"}
C#	"42..12..19."	new Char[] {'.'}	{"42", "", "12", "", "19", ""}
Visual Basic	"42..12..19."	Char() = {"." c}	{"42", "", "12", "", "19", ""}
C#	"Banana"	new Char[] {'.'}	{"Banana"}
Visual Basic	"Banana"	Char() = {"." c}	{"Banana"}
C#	"Darb\nSmarba"	new Char[] {}	{"Darb", "Smarba"}
Visual Basic	"Darb" & vbLf & "Smarba"	Char() = {}	{"Darb", "Smarba"}
C#	"Darb\nSmarba"	nulo	{"Darb", "Smarba"}
Visual Basic	"Darb" & vbLf & "Smarba"	Nada	{"Darb", "Smarba"}

Consideraciones sobre el rendimiento

Notas a los autores de las llamadas

Consulte también

Se aplica a

Split(Char, StringSplitOptions)

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Divide una cadena en subcadenas en función de un carácter delimitador especificado y, opcionalmente, las opciones.

public string[] Split (char separator, StringSplitOptions options = System.StringSplitOptions.None);

member this.Split : char * StringSplitOptions -> string[]

Public Function Split (separator As Char, Optional options As StringSplitOptions = System.StringSplitOptions.None) As String()

Parámetros

separator: Char

Carácter que delimita las subcadenas de esta cadena.

options: StringSplitOptions

Combinación bit a bit de los valores de enumeración que especifica si se deben recortar subcadenas e incluir subcadenas vacías.

Devoluciones

String[]

Matriz cuyos elementos contienen las subcadenas de esta instancia delimitadas por separator.

Se aplica a

Split(ReadOnlySpan<Char>)

Divide una cadena en subcadenas en función de los caracteres delimitadores especificados.

public:
 cli::array <System::String ^> ^ Split(ReadOnlySpan<char> separator);

public string[] Split (scoped ReadOnlySpan<char> separator);

member this.Split : ReadOnlySpan<char> -> string[]

Public Function Split (separator As ReadOnlySpan(Of Char)) As String()

Parámetros

separator: ReadOnlySpan<Char>

Intervalo de caracteres delimitadores o un intervalo vacío que no contiene delimitadores.

Devoluciones

String[]

Matriz cuyos elementos contienen las subcadenas de esta instancia delimitadas por uno o varios caracteres en separator.

Se aplica a

Split(String[], Int32, StringSplitOptions)

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Divide una cadena en un número máximo de subcadenas basadas en cadenas delimitadas especificadas y, opcionalmente, opciones.

public:
 cli::array <System::String ^> ^ Split(cli::array <System::String ^> ^ separator, int count, StringSplitOptions options);

public string[] Split (string[] separator, int count, StringSplitOptions options);

public string[] Split (string[]? separator, int count, StringSplitOptions options);

[System.Runtime.InteropServices.ComVisible(false)]
public string[] Split (string[] separator, int count, StringSplitOptions options);

member this.Split : string[] * int * StringSplitOptions -> string[]

[<System.Runtime.InteropServices.ComVisible(false)>]
member this.Split : string[] * int * StringSplitOptions -> string[]

Public Function Split (separator As String(), count As Integer, options As StringSplitOptions) As String()

Parámetros

separator: String[]

Las cadenas que delimitan las subcadenas de esta cadena, una matriz vacía que no contiene delimitadores ni null.

count: Int32

Número máximo de subcadenas que se van a devolver.

options: StringSplitOptions

Combinación bit a bit de los valores de enumeración que especifica si se deben recortar subcadenas e incluir subcadenas vacías.

Devoluciones

String[]

Matriz cuyos elementos contienen las subcadenas de esta cadena delimitadas por una o varias cadenas de separator. Para obtener más información, vea la sección Comentarios.

Atributos: ComVisibleAttribute

Excepciones

ArgumentOutOfRangeException

count es negativo.

ArgumentException

options no es uno de los valores de StringSplitOptions.

Ejemplos

En el ejemplo siguiente se usa la enumeración StringSplitOptions para incluir o excluir subcadenas generadas por el método Split.

// This example demonstrates the String.Split(Char[], Boolean) and 
//                               String.Split(Char[], Int32, Boolean) methods
using namespace System;
void Show( array<String^>^entries )
{
   Console::WriteLine( "The return value contains these {0} elements:", entries->Length );
   System::Collections::IEnumerator^ myEnum = entries->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      String^ entry = safe_cast<String^>(myEnum->Current);
      Console::Write( "<{0}>", entry );
   }

   Console::Write( "{0}{0}", Environment::NewLine );
}

int main()
{
   String^ s = ",one,,,two,,,,,three,,";
   array<Char>^sep = gcnew array<Char>{
      ','
   };
   array<String^>^result;
   
   //
   Console::WriteLine( "The original string is \"{0}\".", s );
   Console::WriteLine( "The separation character is '{0}'.", sep[ 0 ] );
   Console::WriteLine();
   
   //
   Console::WriteLine( "Split the string and return all elements:" );
   result = s->Split( sep, StringSplitOptions::None );
   Show( result );
   
   //
   Console::WriteLine( "Split the string and return all non-empty elements:" );
   result = s->Split( sep, StringSplitOptions::RemoveEmptyEntries );
   Show( result );
   
   //
   Console::WriteLine( "Split the string and return 2 elements:" );
   result = s->Split( sep, 2, StringSplitOptions::None );
   Show( result );
   
   //
   Console::WriteLine( "Split the string and return 2 non-empty elements:" );
   result = s->Split( sep, 2, StringSplitOptions::RemoveEmptyEntries );
   Show( result );
}

/*
This example produces the following results:

The original string is ",one,,,two,,,,,three,,".
The separation character is ','.

Split the string and return all elements:
The return value contains these 12 elements:
<><one><><><two><><><><><three><><>

Split the string and return all non-empty elements:
The return value contains these 3 elements:
<one><two><three>

Split the string and return 2 elements:
The return value contains these 2 elements:
<><one,,,two,,,,,three,,>

Split the string and return 2 non-empty elements:
The return value contains these 2 elements:
<one><,,two,,,,,three,,>

*/

// This example demonstrates the String.Split() methods that use
// the StringSplitOptions enumeration.

// Example 1: Split a string delimited by characters
Console.WriteLine("1) Split a string delimited by characters:\n");

string s1 = ",ONE,, TWO,, , THREE,,";
char[] charSeparators = new char[] { ',' };
string[] result;

Console.WriteLine($"The original string is: \"{s1}\".");
Console.WriteLine($"The delimiter character is: '{charSeparators[0]}'.\n");

// Split the string and return all elements
Console.WriteLine("1a) Return all elements:");
result = s1.Split(charSeparators, StringSplitOptions.None);
Show(result);

// Split the string and return all elements with whitespace trimmed
Console.WriteLine("1b) Return all elements with whitespace trimmed:");
result = s1.Split(charSeparators, StringSplitOptions.TrimEntries);
Show(result);

// Split the string and return all non-empty elements
Console.WriteLine("1c) Return all non-empty elements:");
result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Split the string and return all non-whitespace elements with whitespace trimmed
Console.WriteLine("1d) Return all non-whitespace elements with whitespace trimmed:");
result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
Show(result);


// Split the string into only two elements, keeping the remainder in the last match
Console.WriteLine("1e) Split into only two elements:");
result = s1.Split(charSeparators, 2, StringSplitOptions.None);
Show(result);

// Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
Console.WriteLine("1f) Split into only two elements with whitespace trimmed:");
result = s1.Split(charSeparators, 2, StringSplitOptions.TrimEntries);
Show(result);

// Split the string into only two non-empty elements, keeping the remainder in the last match
Console.WriteLine("1g) Split into only two non-empty elements:");
result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
Console.WriteLine("1h) Split into only two non-whitespace elements with whitespace trimmed:");
result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
Show(result);


// Example 2: Split a string delimited by another string
Console.WriteLine("2) Split a string delimited by another string:\n");

string s2 = "[stop]" +
            "ONE[stop] [stop]" +
            "TWO  [stop][stop]  [stop]" +
            "THREE[stop][stop]  ";
string[] stringSeparators = new string[] { "[stop]" };

Console.WriteLine($"The original string is: \"{s2}\".");
Console.WriteLine($"The delimiter string is: \"{stringSeparators[0]}\".\n");

// Split the string and return all elements
Console.WriteLine("2a) Return all elements:");
result = s2.Split(stringSeparators, StringSplitOptions.None);
Show(result);

// Split the string and return all elements with whitespace trimmed
Console.WriteLine("2b) Return all elements with whitespace trimmed:");
result = s2.Split(stringSeparators, StringSplitOptions.TrimEntries);
Show(result);

// Split the string and return all non-empty elements
Console.WriteLine("2c) Return all non-empty elements:");
result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Split the string and return all non-whitespace elements with whitespace trimmed
Console.WriteLine("2d) Return all non-whitespace elements with whitespace trimmed:");
result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
Show(result);


// Split the string into only two elements, keeping the remainder in the last match
Console.WriteLine("2e) Split into only two elements:");
result = s2.Split(stringSeparators, 2, StringSplitOptions.None);
Show(result);

// Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
Console.WriteLine("2f) Split into only two elements with whitespace trimmed:");
result = s2.Split(stringSeparators, 2, StringSplitOptions.TrimEntries);
Show(result);

// Split the string into only two non-empty elements, keeping the remainder in the last match
Console.WriteLine("2g) Split into only two non-empty elements:");
result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
Console.WriteLine("2h) Split into only two non-whitespace elements with whitespace trimmed:");
result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
Show(result);


// Display the array of separated strings using a local function
void Show(string[] entries)
{
    Console.WriteLine($"The return value contains these {entries.Length} elements:");
    foreach (string entry in entries)
    {
        Console.Write($"<{entry}>");
    }
    Console.Write("\n\n");
}

/*
This example produces the following results:

1) Split a string delimited by characters:

The original string is: ",ONE,, TWO,, , THREE,,".
The delimiter character is: ','.

1a) Return all elements:
The return value contains these 9 elements:
<><ONE><>< TWO><>< >< THREE><><>

1b) Return all elements with whitespace trimmed:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

1c) Return all non-empty elements:
The return value contains these 4 elements:
<ONE>< TWO>< >< THREE>

1d) Return all non-whitespace elements with whitespace trimmed:
The return value contains these 3 elements:
<ONE><TWO><THREE>

1e) Split into only two elements:
The return value contains these 2 elements:
<><ONE,, TWO,, , THREE,,>

1f) Split into only two elements with whitespace trimmed:
The return value contains these 2 elements:
<><ONE,, TWO,, , THREE,,>

1g) Split into only two non-empty elements:
The return value contains these 2 elements:
<ONE>< TWO,, , THREE,,>

1h) Split into only two non-whitespace elements with whitespace trimmed:
The return value contains these 2 elements:
<ONE><TWO,, , THREE,,>

2) Split a string delimited by another string:

The original string is: "[stop]ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  ".
The delimiter string is: "[stop]".

2a) Return all elements:
The return value contains these 9 elements:
<><ONE>< ><TWO  ><><  ><THREE><><  >

2b) Return all elements with whitespace trimmed:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

2c) Return all non-empty elements:
The return value contains these 6 elements:
<ONE>< ><TWO  ><  ><THREE><  >

2d) Return all non-whitespace elements with whitespace trimmed:
The return value contains these 3 elements:
<ONE><TWO><THREE>

2e) Split into only two elements:
The return value contains these 2 elements:
<><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >

2f) Split into only two elements with whitespace trimmed:
The return value contains these 2 elements:
<><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]>

2g) Split into only two non-empty elements:
The return value contains these 2 elements:
<ONE>< [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >

2h) Split into only two non-whitespace elements with whitespace trimmed:
The return value contains these 2 elements:
<ONE><TWO  [stop][stop]  [stop]THREE[stop][stop]>

*/

// This example demonstrates the String.Split() methods that use
// the StringSplitOptions enumeration.

// Display the array of separated strings using a local function
let show  (entries: string[]) =
    printfn $"The return value contains these {entries.Length} elements:"
    for entry in entries do
        printf $"<{entry}>"
    printf "\n\n"

// Example 1: Split a string delimited by characters
printfn "1) Split a string delimited by characters:\n"

let s1 = ",ONE,, TWO,, , THREE,,"
let charSeparators = [| ',' |]

printfn $"The original string is: \"{s1}\"."
printfn $"The delimiter character is: '{charSeparators[0]}'.\n"

// Split the string and return all elements
printfn "1a) Return all elements:"
let result = s1.Split(charSeparators, StringSplitOptions.None)
show result

// Split the string and return all elements with whitespace trimmed
printfn "1b) Return all elements with whitespace trimmed:"
let result = s1.Split(charSeparators, StringSplitOptions.TrimEntries)
show result

// Split the string and return all non-empty elements
printfn "1c) Return all non-empty elements:"
let result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries)
show result

// Split the string and return all non-whitespace elements with whitespace trimmed
printfn "1d) Return all non-whitespace elements with whitespace trimmed:"
let result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries ||| StringSplitOptions.TrimEntries)
show result


// Split the string into only two elements, keeping the remainder in the last match
printfn "1e) Split into only two elements:"
let result = s1.Split(charSeparators, 2, StringSplitOptions.None)
show result

// Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
printfn "1f) Split into only two elements with whitespace trimmed:"
let result = s1.Split(charSeparators, 2, StringSplitOptions.TrimEntries)
show result

// Split the string into only two non-empty elements, keeping the remainder in the last match
printfn "1g) Split into only two non-empty elements:"
let result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
show result

// Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
printfn "1h) Split into only two non-whitespace elements with whitespace trimmed:"
let result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries ||| StringSplitOptions.TrimEntries)
show result


// Example 2: Split a string delimited by another string
printfn "2) Split a string delimited by another string:\n"

let s2 = "[stop]" +
            "ONE[stop] [stop]" +
            "TWO  [stop][stop]  [stop]" +
            "THREE[stop][stop]  "
let stringSeparators = [| "[stop]" |]

printfn $"The original string is: \"{s2}\"."
printfn $"The delimiter string is: \"{stringSeparators[0]}\".\n"

// Split the string and return all elements
printfn "2a) Return all elements:"
let result = s2.Split(stringSeparators, StringSplitOptions.None)
show result

// Split the string and return all elements with whitespace trimmed
printfn "2b) Return all elements with whitespace trimmed:"
let result = s2.Split(stringSeparators, StringSplitOptions.TrimEntries)
show result

// Split the string and return all non-empty elements
printfn "2c) Return all non-empty elements:"
let result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries)
show result

// Split the string and return all non-whitespace elements with whitespace trimmed
printfn "2d) Return all non-whitespace elements with whitespace trimmed:"
let result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries ||| StringSplitOptions.TrimEntries)
show result


// Split the string into only two elements, keeping the remainder in the last match
printfn "2e) Split into only two elements:"
let result = s2.Split(stringSeparators, 2, StringSplitOptions.None)
show result

// Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
printfn "2f) Split into only two elements with whitespace trimmed:"
let result = s2.Split(stringSeparators, 2, StringSplitOptions.TrimEntries)
show result

// Split the string into only two non-empty elements, keeping the remainder in the last match
printfn "2g) Split into only two non-empty elements:"
let result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
show result

// Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
printfn "2h) Split into only two non-whitespace elements with whitespace trimmed:"
let result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries ||| StringSplitOptions.TrimEntries)
show result

(*
This example produces the following results:

1) Split a string delimited by characters:

The original string is: ",ONE,, TWO,, , THREE,,".
The delimiter character is: ','.

1a) Return all elements:
The return value contains these 9 elements:
<><ONE><>< TWO><>< >< THREE><><>

1b) Return all elements with whitespace trimmed:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

1c) Return all non-empty elements:
The return value contains these 4 elements:
<ONE>< TWO>< >< THREE>

1d) Return all non-whitespace elements with whitespace trimmed:
The return value contains these 3 elements:
<ONE><TWO><THREE>

1e) Split into only two elements:
The return value contains these 2 elements:
<><ONE,, TWO,, , THREE,,>

1f) Split into only two elements with whitespace trimmed:
The return value contains these 2 elements:
<><ONE,, TWO,, , THREE,,>

1g) Split into only two non-empty elements:
The return value contains these 2 elements:
<ONE>< TWO,, , THREE,,>

1h) Split into only two non-whitespace elements with whitespace trimmed:
The return value contains these 2 elements:
<ONE><TWO,, , THREE,,>

2) Split a string delimited by another string:

The original string is: "[stop]ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  ".
The delimiter string is: "[stop]".

2a) Return all elements:
The return value contains these 9 elements:
<><ONE>< ><TWO  ><><  ><THREE><><  >

2b) Return all elements with whitespace trimmed:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

2c) Return all non-empty elements:
The return value contains these 6 elements:
<ONE>< ><TWO  ><  ><THREE><  >

2d) Return all non-whitespace elements with whitespace trimmed:
The return value contains these 3 elements:
<ONE><TWO><THREE>

2e) Split into only two elements:
The return value contains these 2 elements:
<><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >

2f) Split into only two elements with whitespace trimmed:
The return value contains these 2 elements:
<><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]>

2g) Split into only two non-empty elements:
The return value contains these 2 elements:
<ONE>< [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >

2h) Split into only two non-whitespace elements with whitespace trimmed:
The return value contains these 2 elements:
<ONE><TWO  [stop][stop]  [stop]THREE[stop][stop]>

*)

Public Shared Sub StringSplitOptionsExamples()
    ' This example demonstrates the String.Split() methods that use
    ' the StringSplitOptions enumeration.

    ' Example 1: Split a string delimited by characters
    Console.WriteLine("1) Split a string delimited by characters:" & vbCrLf)

    Dim s1 As String = ",ONE,, TWO,, , THREE,,"
    Dim charSeparators() As Char = {","c}
    Dim result() As String

    Console.WriteLine("The original string is: ""{0}"".", s1)
    Console.WriteLine("The delimiter character is: '{0}'." & vbCrLf, charSeparators(0))

    ' Split the string and return all elements
    Console.WriteLine("1a) Return all elements:")
    result = s1.Split(charSeparators, StringSplitOptions.None)
    Show(result)

    ' Split the string and return all elements with whitespace trimmed
    Console.WriteLine("1b) Return all elements with whitespace trimmed:")
    result = s1.Split(charSeparators, StringSplitOptions.TrimEntries)
    Show(result)

    ' Split the string and return all non-empty elements
    Console.WriteLine("1c) Return all non-empty elements:")
    result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' Split the string and return all non-whitespace elements with whitespace trimmed
    Console.WriteLine("1d) Return all non-whitespace elements with whitespace trimmed:")
    result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries Or StringSplitOptions.TrimEntries)
    Show(result)


    ' Split the string into only two elements, keeping the remainder in the last match
    Console.WriteLine("1e) Split into only two elements:")
    result = s1.Split(charSeparators, 2, StringSplitOptions.None)
    Show(result)

    ' Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
    Console.WriteLine("1f) Split into only two elements with whitespace trimmed:")
    result = s1.Split(charSeparators, 2, StringSplitOptions.TrimEntries)
    Show(result)

    ' Split the string into only two non-empty elements, keeping the remainder in the last match
    Console.WriteLine("1g) Split into only two non-empty elements:")
    result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
    Console.WriteLine("1h) Split into only two non-whitespace elements with whitespace trimmed:")
    result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries Or StringSplitOptions.TrimEntries)
    Show(result)


    ' Example 2: Split a string delimited by another string
    Console.WriteLine("2) Split a string delimited by another string:" & vbCrLf)

    Dim s2 As String = "[stop]" +
                "ONE[stop] [stop]" +
                "TWO  [stop][stop]  [stop]" +
                "THREE[stop][stop]  "
    Dim stringSeparators() As String = {"[stop]"}


    Console.WriteLine("The original string is: ""{0}"".", s2)
    Console.WriteLine("The delimiter string is: ""{0}""." & vbCrLf, stringSeparators(0))

    ' Split the string and return all elements
    Console.WriteLine("2a) Return all elements:")
    result = s2.Split(stringSeparators, StringSplitOptions.None)
    Show(result)

    ' Split the string and return all elements with whitespace trimmed
    Console.WriteLine("2b) Return all elements with whitespace trimmed:")
    result = s2.Split(stringSeparators, StringSplitOptions.TrimEntries)
    Show(result)

    ' Split the string and return all non-empty elements
    Console.WriteLine("2c) Return all non-empty elements:")
    result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' Split the string and return all non-whitespace elements with whitespace trimmed
    Console.WriteLine("2d) Return all non-whitespace elements with whitespace trimmed:")
    result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries Or StringSplitOptions.TrimEntries)
    Show(result)


    ' Split the string into only two elements, keeping the remainder in the last match
    Console.WriteLine("2e) Split into only two elements:")
    result = s2.Split(stringSeparators, 2, StringSplitOptions.None)
    Show(result)

    ' Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
    Console.WriteLine("2f) Split into only two elements with whitespace trimmed:")
    result = s2.Split(stringSeparators, 2, StringSplitOptions.TrimEntries)
    Show(result)

    ' Split the string into only two non-empty elements, keeping the remainder in the last match
    Console.WriteLine("2g) Split into only two non-empty elements:")
    result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
    Console.WriteLine("2h) Split into only two non-whitespace elements with whitespace trimmed:")
    result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries Or StringSplitOptions.TrimEntries)
    Show(result)

End Sub

' Display the array of separated strings.
Public Shared Sub Show(ByVal entries() As String)
    Console.WriteLine("The return value contains these {0} elements:", entries.Length)
    Dim entry As String
    For Each entry In entries
        Console.Write("<{0}>", entry)
    Next entry
    Console.Write(vbCrLf & vbCrLf)

End Sub

'This example produces the following results:
'
' 1) Split a string delimited by characters:
'
' The original string is: ",ONE,, TWO,, , THREE,,".
' The delimiter character is: ','.
'
' 1a) Return all elements:
' The return value contains these 9 elements:
' <><ONE><>< TWO><>< >< THREE><><>
'
' 1b) Return all elements with whitespace trimmed:
' The return value contains these 9 elements:
' <><ONE><><TWO><><><THREE><><>
'
' 1c) Return all non-empty elements:
' The return value contains these 4 elements:
' <ONE>< TWO>< >< THREE>
'
' 1d) Return all non-whitespace elements with whitespace trimmed:
' The return value contains these 3 elements:
' <ONE><TWO><THREE>
'
' 1e) Split into only two elements:
' The return value contains these 2 elements:
' <><ONE,, TWO,, , THREE,,>
'
' 1f) Split into only two elements with whitespace trimmed:
' The return value contains these 2 elements:
' <><ONE,, TWO,, , THREE,,>
'
' 1g) Split into only two non-empty elements:
' The return value contains these 2 elements:
' <ONE>< TWO,, , THREE,,>
'
' 1h) Split into only two non-whitespace elements with whitespace trimmed:
' The return value contains these 2 elements:
' <ONE><TWO,, , THREE,,>
'
' 2) Split a string delimited by another string:
'
' The original string is: "[stop]ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  ".
' The delimiter string is: "[stop]".
'
' 2a) Return all elements:
' The return value contains these 9 elements:
' <><ONE>< ><TWO  ><><  ><THREE><><  >
'
' 2b) Return all elements with whitespace trimmed:
' The return value contains these 9 elements:
' <><ONE><><TWO><><><THREE><><>
'
' 2c) Return all non-empty elements:
' The return value contains these 6 elements:
' <ONE>< ><TWO  ><  ><THREE><  >
'
' 2d) Return all non-whitespace elements with whitespace trimmed:
' The return value contains these 3 elements:
' <ONE><TWO><THREE>
'
' 2e) Split into only two elements:
' The return value contains these 2 elements:
' <><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >
'
' 2f) Split into only two elements with whitespace trimmed:
' The return value contains these 2 elements:
' <><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]>
'
' 2g) Split into only two non-empty elements:
' The return value contains these 2 elements:
' <ONE>< [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >
'
' 2h) Split into only two non-whitespace elements with whitespace trimmed:
' The return value contains these 2 elements:
' <ONE><TWO  [stop][stop]  [stop]THREE[stop][stop]>
'

Comentarios

Las cadenas delimitadores no se incluyen en los elementos de la matriz devuelta.

Si esta instancia no contiene ninguna de las cadenas de separatoro el parámetro count es 1, la matriz devuelta consta de un único elemento que contiene esta instancia.

Para pasar null para el parámetro string[] separator, debe indicar el tipo del null para desambiguar la llamada de otras sobrecargas, como Split(Char[], Int32, StringSplitOptions). En el ejemplo siguiente se muestran varias maneras de identificar esta sobrecarga de forma inequívoca.

string phrase = "The quick  brown fox";

_ = phrase.Split(default(string[]), 3, StringSplitOptions.RemoveEmptyEntries);

_ = phrase.Split((string[]?)null, 3, StringSplitOptions.RemoveEmptyEntries);

_ = phrase.Split(null as string[], 3, StringSplitOptions.RemoveEmptyEntries);

let phrase = "The quick  brown fox"

phrase.Split(Unchecked.defaultof<string[]>, 3, StringSplitOptions.RemoveEmptyEntries) |> ignore

phrase.Split(null :> string[], 3, StringSplitOptions.RemoveEmptyEntries) |> ignore

phrase.Split((null: string[]), 3, StringSplitOptions.RemoveEmptyEntries) |> ignore

Dim phrase As String = "The quick brown fox"
Dim words() As String

words = phrase.Split(TryCast(Nothing, String()), 3,
                       StringSplitOptions.RemoveEmptyEntries)

words = phrase.Split(New String() {}, 3,
                     StringSplitOptions.RemoveEmptyEntries)

Si el parámetro count es cero o el parámetro options es RemoveEmptyEntries y la longitud de esta instancia es cero, se devuelve una matriz vacía.

Cada elemento de separator define un delimitador independiente que consta de uno o varios caracteres. Si el parámetro options es Noney dos delimitadores son adyacentes o se encuentra un delimitador al principio o al final de esta instancia, el elemento de matriz correspondiente contiene Empty.

Si count es mayor que el número de subcadenas, se devuelven las subcadenas disponibles y no se produce ninguna excepción.

Matriz separadora

Si alguno de los elementos de separator consta de varios caracteres, toda la subcadena se considera un delimitador. Por ejemplo, si uno de los elementos de separator es "10", intenta dividir la cadena "This10is10a10string". devuelve esta matriz de cuatro elementos: { "This", "is", "a", "string". }.

Detalles de comparación

El método Split extrae las subcadenas de esta cadena delimitadas por una o varias de las cadenas del parámetro separator y devuelve esas subcadenas como elementos de una matriz.

El método Split omite cualquier elemento de separator cuyo valor es null o la cadena vacía ("").

Para evitar resultados ambiguos cuando las cadenas de separator tienen caracteres en común, el método Split continúa desde el principio hasta el final del valor de la instancia y coincide con el primer elemento de separator que es igual a un delimitador en la instancia. El orden en el que se encuentran subcadenas en la instancia tiene prioridad sobre el orden de los elementos de separator.

Por ejemplo, considere una instancia cuyo valor es "abcdef". Si el primer elemento de separator era "ef" y el segundo elemento era "bcde", el resultado de la operación de división sería "a" y "f". Esto se debe a que la subcadena de la instancia de , "bcde", se encuentra y coincide con un elemento de separator antes de que se encuentre la subcadena "f".

Sin embargo, si el primer elemento de separator era "bcd" y el segundo elemento era "bc", el resultado de la operación de división sería "a" y "ef". Esto se debe a que "bcd" es el primer delimitador de separator que coincide con un delimitador en la instancia de . Si el orden de los separadores se invertía para que el primer elemento fuera "bc" y el segundo elemento fuera "bcd", el resultado sería "a" y "def".

Consideraciones sobre el rendimiento

Notas a los autores de las llamadas

Se aplica a

Split(Char[], StringSplitOptions)

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Source:: String.Manipulation.cs

Divide una cadena en subcadenas en función de los caracteres y opciones de delimitadores especificados.

public:
 cli::array <System::String ^> ^ Split(cli::array <char> ^ separator, StringSplitOptions options);

public string[] Split (char[] separator, StringSplitOptions options);

public string[] Split (char[]? separator, StringSplitOptions options);

[System.Runtime.InteropServices.ComVisible(false)]
public string[] Split (char[] separator, StringSplitOptions options);

member this.Split : char[] * StringSplitOptions -> string[]

[<System.Runtime.InteropServices.ComVisible(false)>]
member this.Split : char[] * StringSplitOptions -> string[]

Public Function Split (separator As Char(), options As StringSplitOptions) As String()

Parámetros

separator: Char[]

Matriz de caracteres que delimitan las subcadenas de esta cadena, una matriz vacía que no contiene delimitadores ni null.

options: StringSplitOptions

Combinación bit a bit de los valores de enumeración que especifica si se deben recortar subcadenas e incluir subcadenas vacías.

Devoluciones

String[]

Matriz cuyos elementos contienen las subcadenas de esta cadena delimitadas por uno o varios caracteres en separator. Para obtener más información, vea la sección Comentarios.

Atributos: ComVisibleAttribute

Excepciones

ArgumentException

options no es uno de los valores de StringSplitOptions.

Ejemplos

En el ejemplo siguiente se usa la enumeración StringSplitOptions para incluir o excluir subcadenas generadas por el método Split.

// This example demonstrates the String.Split(Char[], Boolean) and 
//                               String.Split(Char[], Int32, Boolean) methods
using namespace System;
void Show( array<String^>^entries )
{
   Console::WriteLine( "The return value contains these {0} elements:", entries->Length );
   System::Collections::IEnumerator^ myEnum = entries->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      String^ entry = safe_cast<String^>(myEnum->Current);
      Console::Write( "<{0}>", entry );
   }

   Console::Write( "{0}{0}", Environment::NewLine );
}

int main()
{
   String^ s = ",one,,,two,,,,,three,,";
   array<Char>^sep = gcnew array<Char>{
      ','
   };
   array<String^>^result;
   
   //
   Console::WriteLine( "The original string is \"{0}\".", s );
   Console::WriteLine( "The separation character is '{0}'.", sep[ 0 ] );
   Console::WriteLine();
   
   //
   Console::WriteLine( "Split the string and return all elements:" );
   result = s->Split( sep, StringSplitOptions::None );
   Show( result );
   
   //
   Console::WriteLine( "Split the string and return all non-empty elements:" );
   result = s->Split( sep, StringSplitOptions::RemoveEmptyEntries );
   Show( result );
   
   //
   Console::WriteLine( "Split the string and return 2 elements:" );
   result = s->Split( sep, 2, StringSplitOptions::None );
   Show( result );
   
   //
   Console::WriteLine( "Split the string and return 2 non-empty elements:" );
   result = s->Split( sep, 2, StringSplitOptions::RemoveEmptyEntries );
   Show( result );
}

/*
This example produces the following results:

The original string is ",one,,,two,,,,,three,,".
The separation character is ','.

Split the string and return all elements:
The return value contains these 12 elements:
<><one><><><two><><><><><three><><>

Split the string and return all non-empty elements:
The return value contains these 3 elements:
<one><two><three>

Split the string and return 2 elements:
The return value contains these 2 elements:
<><one,,,two,,,,,three,,>

Split the string and return 2 non-empty elements:
The return value contains these 2 elements:
<one><,,two,,,,,three,,>

*/

// This example demonstrates the String.Split() methods that use
// the StringSplitOptions enumeration.

// Example 1: Split a string delimited by characters
Console.WriteLine("1) Split a string delimited by characters:\n");

string s1 = ",ONE,, TWO,, , THREE,,";
char[] charSeparators = new char[] { ',' };
string[] result;

Console.WriteLine($"The original string is: \"{s1}\".");
Console.WriteLine($"The delimiter character is: '{charSeparators[0]}'.\n");

// Split the string and return all elements
Console.WriteLine("1a) Return all elements:");
result = s1.Split(charSeparators, StringSplitOptions.None);
Show(result);

// Split the string and return all elements with whitespace trimmed
Console.WriteLine("1b) Return all elements with whitespace trimmed:");
result = s1.Split(charSeparators, StringSplitOptions.TrimEntries);
Show(result);

// Split the string and return all non-empty elements
Console.WriteLine("1c) Return all non-empty elements:");
result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Split the string and return all non-whitespace elements with whitespace trimmed
Console.WriteLine("1d) Return all non-whitespace elements with whitespace trimmed:");
result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
Show(result);


// Split the string into only two elements, keeping the remainder in the last match
Console.WriteLine("1e) Split into only two elements:");
result = s1.Split(charSeparators, 2, StringSplitOptions.None);
Show(result);

// Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
Console.WriteLine("1f) Split into only two elements with whitespace trimmed:");
result = s1.Split(charSeparators, 2, StringSplitOptions.TrimEntries);
Show(result);

// Split the string into only two non-empty elements, keeping the remainder in the last match
Console.WriteLine("1g) Split into only two non-empty elements:");
result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
Console.WriteLine("1h) Split into only two non-whitespace elements with whitespace trimmed:");
result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
Show(result);


// Example 2: Split a string delimited by another string
Console.WriteLine("2) Split a string delimited by another string:\n");

string s2 = "[stop]" +
            "ONE[stop] [stop]" +
            "TWO  [stop][stop]  [stop]" +
            "THREE[stop][stop]  ";
string[] stringSeparators = new string[] { "[stop]" };

Console.WriteLine($"The original string is: \"{s2}\".");
Console.WriteLine($"The delimiter string is: \"{stringSeparators[0]}\".\n");

// Split the string and return all elements
Console.WriteLine("2a) Return all elements:");
result = s2.Split(stringSeparators, StringSplitOptions.None);
Show(result);

// Split the string and return all elements with whitespace trimmed
Console.WriteLine("2b) Return all elements with whitespace trimmed:");
result = s2.Split(stringSeparators, StringSplitOptions.TrimEntries);
Show(result);

// Split the string and return all non-empty elements
Console.WriteLine("2c) Return all non-empty elements:");
result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Split the string and return all non-whitespace elements with whitespace trimmed
Console.WriteLine("2d) Return all non-whitespace elements with whitespace trimmed:");
result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
Show(result);


// Split the string into only two elements, keeping the remainder in the last match
Console.WriteLine("2e) Split into only two elements:");
result = s2.Split(stringSeparators, 2, StringSplitOptions.None);
Show(result);

// Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
Console.WriteLine("2f) Split into only two elements with whitespace trimmed:");
result = s2.Split(stringSeparators, 2, StringSplitOptions.TrimEntries);
Show(result);

// Split the string into only two non-empty elements, keeping the remainder in the last match
Console.WriteLine("2g) Split into only two non-empty elements:");
result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
Console.WriteLine("2h) Split into only two non-whitespace elements with whitespace trimmed:");
result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
Show(result);


// Display the array of separated strings using a local function
void Show(string[] entries)
{
    Console.WriteLine($"The return value contains these {entries.Length} elements:");
    foreach (string entry in entries)
    {
        Console.Write($"<{entry}>");
    }
    Console.Write("\n\n");
}

/*
This example produces the following results:

1) Split a string delimited by characters:

The original string is: ",ONE,, TWO,, , THREE,,".
The delimiter character is: ','.

1a) Return all elements:
The return value contains these 9 elements:
<><ONE><>< TWO><>< >< THREE><><>

1b) Return all elements with whitespace trimmed:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

1c) Return all non-empty elements:
The return value contains these 4 elements:
<ONE>< TWO>< >< THREE>

1d) Return all non-whitespace elements with whitespace trimmed:
The return value contains these 3 elements:
<ONE><TWO><THREE>

1e) Split into only two elements:
The return value contains these 2 elements:
<><ONE,, TWO,, , THREE,,>

1f) Split into only two elements with whitespace trimmed:
The return value contains these 2 elements:
<><ONE,, TWO,, , THREE,,>

1g) Split into only two non-empty elements:
The return value contains these 2 elements:
<ONE>< TWO,, , THREE,,>

1h) Split into only two non-whitespace elements with whitespace trimmed:
The return value contains these 2 elements:
<ONE><TWO,, , THREE,,>

2) Split a string delimited by another string:

The original string is: "[stop]ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  ".
The delimiter string is: "[stop]".

2a) Return all elements:
The return value contains these 9 elements:
<><ONE>< ><TWO  ><><  ><THREE><><  >

2b) Return all elements with whitespace trimmed:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

2c) Return all non-empty elements:
The return value contains these 6 elements:
<ONE>< ><TWO  ><  ><THREE><  >

2d) Return all non-whitespace elements with whitespace trimmed:
The return value contains these 3 elements:
<ONE><TWO><THREE>

2e) Split into only two elements:
The return value contains these 2 elements:
<><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >

2f) Split into only two elements with whitespace trimmed:
The return value contains these 2 elements:
<><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]>

2g) Split into only two non-empty elements:
The return value contains these 2 elements:
<ONE>< [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >

2h) Split into only two non-whitespace elements with whitespace trimmed:
The return value contains these 2 elements:
<ONE><TWO  [stop][stop]  [stop]THREE[stop][stop]>

*/

// This example demonstrates the String.Split() methods that use
// the StringSplitOptions enumeration.

// Display the array of separated strings using a local function
let show  (entries: string[]) =
    printfn $"The return value contains these {entries.Length} elements:"
    for entry in entries do
        printf $"<{entry}>"
    printf "\n\n"

// Example 1: Split a string delimited by characters
printfn "1) Split a string delimited by characters:\n"

let s1 = ",ONE,, TWO,, , THREE,,"
let charSeparators = [| ',' |]

printfn $"The original string is: \"{s1}\"."
printfn $"The delimiter character is: '{charSeparators[0]}'.\n"

// Split the string and return all elements
printfn "1a) Return all elements:"
let result = s1.Split(charSeparators, StringSplitOptions.None)
show result

// Split the string and return all elements with whitespace trimmed
printfn "1b) Return all elements with whitespace trimmed:"
let result = s1.Split(charSeparators, StringSplitOptions.TrimEntries)
show result

// Split the string and return all non-empty elements
printfn "1c) Return all non-empty elements:"
let result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries)
show result

// Split the string and return all non-whitespace elements with whitespace trimmed
printfn "1d) Return all non-whitespace elements with whitespace trimmed:"
let result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries ||| StringSplitOptions.TrimEntries)
show result


// Split the string into only two elements, keeping the remainder in the last match
printfn "1e) Split into only two elements:"
let result = s1.Split(charSeparators, 2, StringSplitOptions.None)
show result

// Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
printfn "1f) Split into only two elements with whitespace trimmed:"
let result = s1.Split(charSeparators, 2, StringSplitOptions.TrimEntries)
show result

// Split the string into only two non-empty elements, keeping the remainder in the last match
printfn "1g) Split into only two non-empty elements:"
let result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
show result

// Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
printfn "1h) Split into only two non-whitespace elements with whitespace trimmed:"
let result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries ||| StringSplitOptions.TrimEntries)
show result


// Example 2: Split a string delimited by another string
printfn "2) Split a string delimited by another string:\n"

let s2 = "[stop]" +
            "ONE[stop] [stop]" +
            "TWO  [stop][stop]  [stop]" +
            "THREE[stop][stop]  "
let stringSeparators = [| "[stop]" |]

printfn $"The original string is: \"{s2}\"."
printfn $"The delimiter string is: \"{stringSeparators[0]}\".\n"

// Split the string and return all elements
printfn "2a) Return all elements:"
let result = s2.Split(stringSeparators, StringSplitOptions.None)
show result

// Split the string and return all elements with whitespace trimmed
printfn "2b) Return all elements with whitespace trimmed:"
let result = s2.Split(stringSeparators, StringSplitOptions.TrimEntries)
show result

// Split the string and return all non-empty elements
printfn "2c) Return all non-empty elements:"
let result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries)
show result

// Split the string and return all non-whitespace elements with whitespace trimmed
printfn "2d) Return all non-whitespace elements with whitespace trimmed:"
let result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries ||| StringSplitOptions.TrimEntries)
show result


// Split the string into only two elements, keeping the remainder in the last match
printfn "2e) Split into only two elements:"
let result = s2.Split(stringSeparators, 2, StringSplitOptions.None)
show result

// Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
printfn "2f) Split into only two elements with whitespace trimmed:"
let result = s2.Split(stringSeparators, 2, StringSplitOptions.TrimEntries)
show result

// Split the string into only two non-empty elements, keeping the remainder in the last match
printfn "2g) Split into only two non-empty elements:"
let result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
show result

// Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
printfn "2h) Split into only two non-whitespace elements with whitespace trimmed:"
let result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries ||| StringSplitOptions.TrimEntries)
show result

(*
This example produces the following results:

1) Split a string delimited by characters:

The original string is: ",ONE,, TWO,, , THREE,,".
The delimiter character is: ','.

1a) Return all elements:
The return value contains these 9 elements:
<><ONE><>< TWO><>< >< THREE><><>

1b) Return all elements with whitespace trimmed:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

1c) Return all non-empty elements:
The return value contains these 4 elements:
<ONE>< TWO>< >< THREE>

1d) Return all non-whitespace elements with whitespace trimmed:
The return value contains these 3 elements:
<ONE><TWO><THREE>

1e) Split into only two elements:
The return value contains these 2 elements:
<><ONE,, TWO,, , THREE,,>

1f) Split into only two elements with whitespace trimmed:
The return value contains these 2 elements:
<><ONE,, TWO,, , THREE,,>

1g) Split into only two non-empty elements:
The return value contains these 2 elements:
<ONE>< TWO,, , THREE,,>

1h) Split into only two non-whitespace elements with whitespace trimmed:
The return value contains these 2 elements:
<ONE><TWO,, , THREE,,>

2) Split a string delimited by another string:

The original string is: "[stop]ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  ".
The delimiter string is: "[stop]".

2a) Return all elements:
The return value contains these 9 elements:
<><ONE>< ><TWO  ><><  ><THREE><><  >

2b) Return all elements with whitespace trimmed:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

2c) Return all non-empty elements:
The return value contains these 6 elements:
<ONE>< ><TWO  ><  ><THREE><  >

2d) Return all non-whitespace elements with whitespace trimmed:
The return value contains these 3 elements:
<ONE><TWO><THREE>

2e) Split into only two elements:
The return value contains these 2 elements:
<><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >

2f) Split into only two elements with whitespace trimmed:
The return value contains these 2 elements:
<><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]>

2g) Split into only two non-empty elements:
The return value contains these 2 elements:
<ONE>< [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >

2h) Split into only two non-whitespace elements with whitespace trimmed:
The return value contains these 2 elements:
<ONE><TWO  [stop][stop]  [stop]THREE[stop][stop]>

*)

Public Shared Sub StringSplitOptionsExamples()
    ' This example demonstrates the String.Split() methods that use
    ' the StringSplitOptions enumeration.

    ' Example 1: Split a string delimited by characters
    Console.WriteLine("1) Split a string delimited by characters:" & vbCrLf)

    Dim s1 As String = ",ONE,, TWO,, , THREE,,"
    Dim charSeparators() As Char = {","c}
    Dim result() As String

    Console.WriteLine("The original string is: ""{0}"".", s1)
    Console.WriteLine("The delimiter character is: '{0}'." & vbCrLf, charSeparators(0))

    ' Split the string and return all elements
    Console.WriteLine("1a) Return all elements:")
    result = s1.Split(charSeparators, StringSplitOptions.None)
    Show(result)

    ' Split the string and return all elements with whitespace trimmed
    Console.WriteLine("1b) Return all elements with whitespace trimmed:")
    result = s1.Split(charSeparators, StringSplitOptions.TrimEntries)
    Show(result)

    ' Split the string and return all non-empty elements
    Console.WriteLine("1c) Return all non-empty elements:")
    result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' Split the string and return all non-whitespace elements with whitespace trimmed
    Console.WriteLine("1d) Return all non-whitespace elements with whitespace trimmed:")
    result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries Or StringSplitOptions.TrimEntries)
    Show(result)


    ' Split the string into only two elements, keeping the remainder in the last match
    Console.WriteLine("1e) Split into only two elements:")
    result = s1.Split(charSeparators, 2, StringSplitOptions.None)
    Show(result)

    ' Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
    Console.WriteLine("1f) Split into only two elements with whitespace trimmed:")
    result = s1.Split(charSeparators, 2, StringSplitOptions.TrimEntries)
    Show(result)

    ' Split the string into only two non-empty elements, keeping the remainder in the last match
    Console.WriteLine("1g) Split into only two non-empty elements:")
    result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
    Console.WriteLine("1h) Split into only two non-whitespace elements with whitespace trimmed:")
    result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries Or StringSplitOptions.TrimEntries)
    Show(result)


    ' Example 2: Split a string delimited by another string
    Console.WriteLine("2) Split a string delimited by another string:" & vbCrLf)

    Dim s2 As String = "[stop]" +
                "ONE[stop] [stop]" +
                "TWO  [stop][stop]  [stop]" +
                "THREE[stop][stop]  "
    Dim stringSeparators() As String = {"[stop]"}


    Console.WriteLine("The original string is: ""{0}"".", s2)
    Console.WriteLine("The delimiter string is: ""{0}""." & vbCrLf, stringSeparators(0))

    ' Split the string and return all elements
    Console.WriteLine("2a) Return all elements:")
    result = s2.Split(stringSeparators, StringSplitOptions.None)
    Show(result)

    ' Split the string and return all elements with whitespace trimmed
    Console.WriteLine("2b) Return all elements with whitespace trimmed:")
    result = s2.Split(stringSeparators, StringSplitOptions.TrimEntries)
    Show(result)

    ' Split the string and return all non-empty elements
    Console.WriteLine("2c) Return all non-empty elements:")
    result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' Split the string and return all non-whitespace elements with whitespace trimmed
    Console.WriteLine("2d) Return all non-whitespace elements with whitespace trimmed:")
    result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries Or StringSplitOptions.TrimEntries)
    Show(result)


    ' Split the string into only two elements, keeping the remainder in the last match
    Console.WriteLine("2e) Split into only two elements:")
    result = s2.Split(stringSeparators, 2, StringSplitOptions.None)
    Show(result)

    ' Split the string into only two elements with whitespace trimmed, keeping the remainder in the last match
    Console.WriteLine("2f) Split into only two elements with whitespace trimmed:")
    result = s2.Split(stringSeparators, 2, StringSplitOptions.TrimEntries)
    Show(result)

    ' Split the string into only two non-empty elements, keeping the remainder in the last match
    Console.WriteLine("2g) Split into only two non-empty elements:")
    result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' Split the string into only two non-whitespace elements with whitespace trimmed, keeping the remainder in the last match
    Console.WriteLine("2h) Split into only two non-whitespace elements with whitespace trimmed:")
    result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries Or StringSplitOptions.TrimEntries)
    Show(result)

End Sub

' Display the array of separated strings.
Public Shared Sub Show(ByVal entries() As String)
    Console.WriteLine("The return value contains these {0} elements:", entries.Length)
    Dim entry As String
    For Each entry In entries
        Console.Write("<{0}>", entry)
    Next entry
    Console.Write(vbCrLf & vbCrLf)

End Sub

'This example produces the following results:
'
' 1) Split a string delimited by characters:
'
' The original string is: ",ONE,, TWO,, , THREE,,".
' The delimiter character is: ','.
'
' 1a) Return all elements:
' The return value contains these 9 elements:
' <><ONE><>< TWO><>< >< THREE><><>
'
' 1b) Return all elements with whitespace trimmed:
' The return value contains these 9 elements:
' <><ONE><><TWO><><><THREE><><>
'
' 1c) Return all non-empty elements:
' The return value contains these 4 elements:
' <ONE>< TWO>< >< THREE>
'
' 1d) Return all non-whitespace elements with whitespace trimmed:
' The return value contains these 3 elements:
' <ONE><TWO><THREE>
'
' 1e) Split into only two elements:
' The return value contains these 2 elements:
' <><ONE,, TWO,, , THREE,,>
'
' 1f) Split into only two elements with whitespace trimmed:
' The return value contains these 2 elements:
' <><ONE,, TWO,, , THREE,,>
'
' 1g) Split into only two non-empty elements:
' The return value contains these 2 elements:
' <ONE>< TWO,, , THREE,,>
'
' 1h) Split into only two non-whitespace elements with whitespace trimmed:
' The return value contains these 2 elements:
' <ONE><TWO,, , THREE,,>
'
' 2) Split a string delimited by another string:
'
' The original string is: "[stop]ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  ".
' The delimiter string is: "[stop]".
'
' 2a) Return all elements:
' The return value contains these 9 elements:
' <><ONE>< ><TWO  ><><  ><THREE><><  >
'
' 2b) Return all elements with whitespace trimmed:
' The return value contains these 9 elements:
' <><ONE><><TWO><><><THREE><><>
'
' 2c) Return all non-empty elements:
' The return value contains these 6 elements:
' <ONE>< ><TWO  ><  ><THREE><  >
'
' 2d) Return all non-whitespace elements with whitespace trimmed:
' The return value contains these 3 elements:
' <ONE><TWO><THREE>
'
' 2e) Split into only two elements:
' The return value contains these 2 elements:
' <><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >
'
' 2f) Split into only two elements with whitespace trimmed:
' The return value contains these 2 elements:
' <><ONE[stop] [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]>
'
' 2g) Split into only two non-empty elements:
' The return value contains these 2 elements:
' <ONE>< [stop]TWO  [stop][stop]  [stop]THREE[stop][stop]  >
'
' 2h) Split into only two non-whitespace elements with whitespace trimmed:
' The return value contains these 2 elements:
' <ONE><TWO  [stop][stop]  [stop]THREE[stop][stop]>
'

Comentarios

Los caracteres delimitador (los caracteres de la matriz separator) no se incluyen en los elementos de la matriz devuelta. Por ejemplo, si la matriz de separator incluye el carácter "-" y el valor de la instancia de cadena actual es "aa-bb-cc", el método devuelve una matriz que contiene tres elementos: "aa", "bb" y "cc".

Si esta instancia no contiene ninguno de los caracteres de separator, la matriz devuelta consta de un único elemento que contiene esta instancia.

Si el parámetro options es RemoveEmptyEntries y la longitud de esta instancia es cero, el método devuelve una matriz vacía.

Cada elemento de separator define un delimitador independiente que consta de un solo carácter. Si el argumento options es None, y dos delimitadores son adyacentes o se encuentra un delimitador al principio o al final de esta instancia, el elemento de matriz correspondiente contiene String.Empty. Por ejemplo, si separator incluye dos elementos, '-' y '_', el valor de la instancia de cadena es "-_aa-_" y el valor del argumento options es None, el método devuelve una matriz de cadenas con los cinco elementos siguientes:

String.Empty, que representa la cadena vacía que precede al carácter "-" en el índice 0.
String.Empty, que representa la cadena vacía entre el carácter "-" en el índice 0 y el carácter "_" en el índice 1.
"aa".
String.Empty, que representa la cadena vacía que sigue el carácter "-" en el índice 4.
String.Empty, que representa la cadena vacía que sigue al carácter "_" en el índice 5.

Matriz separadora

Para pasar null para el parámetro char[] separator, debe indicar el tipo del null para desambiguar la llamada de otras sobrecargas, como Split(String[], StringSplitOptions). En el ejemplo siguiente se muestran varias maneras de identificar esta sobrecarga de forma inequívoca.

string phrase = "The quick  brown fox";

_ = phrase.Split(default(char[]), StringSplitOptions.RemoveEmptyEntries);

_ = phrase.Split((char[]?)null, StringSplitOptions.RemoveEmptyEntries);

_ = phrase.Split(null as char[], StringSplitOptions.RemoveEmptyEntries);

let phrase = "The quick  brown fox"

phrase.Split(Unchecked.defaultof<char[]>, StringSplitOptions.RemoveEmptyEntries) |> ignore

phrase.Split(null :> char[], StringSplitOptions.RemoveEmptyEntries) |> ignore

phrase.Split((null: char[]), StringSplitOptions.RemoveEmptyEntries) |> ignore

Dim phrase As String = "The quick brown fox"
Dim words() As String

words = phrase.Split(TryCast(Nothing, Char()),
                       StringSplitOptions.RemoveEmptyEntries)

words = phrase.Split(New Char() {},
                     StringSplitOptions.RemoveEmptyEntries)

Detalles de comparación

El método Split extrae las subcadenas de esta cadena delimitadas por uno o varios de los caracteres del parámetro separator y devuelve esas subcadenas como elementos de una matriz.

Consideraciones sobre el rendimiento

Notas a los autores de las llamadas

Se aplica a

Compartir a través de

String.Split Método

Definición

Sobrecargas

Comentarios

Ejemplo

Split(String, Int32, StringSplitOptions)

Parámetros

Devoluciones

Comentarios

Se aplica a

Split(Char[], Int32, StringSplitOptions)

Parámetros

Devoluciones

Excepciones

Ejemplos

Comentarios

Consideraciones sobre el rendimiento

Notas a los autores de las llamadas

Se aplica a

Split(Char, Int32, StringSplitOptions)

Parámetros

Devoluciones

Comentarios

Se aplica a

Split(String[], StringSplitOptions)

Parámetros

Devoluciones

Excepciones

Ejemplos

Comentarios

Matriz separadora

Detalles de comparación

Consideraciones sobre el rendimiento

Notas a los autores de las llamadas

Se aplica a

Split(String, StringSplitOptions)

Parámetros

Devoluciones

Se aplica a

Split(Char[])

Parámetros

Devoluciones

Ejemplos

Comentarios

Matriz separadora

String.Split(Char[]) y resolución de sobrecarga del compilador

Detalles de comparación

Consideraciones sobre el rendimiento

Notas a los autores de las llamadas

Consulte también

Se aplica a

Split(Char[], Int32)

Parámetros

Devoluciones

Excepciones

Ejemplos

Comentarios

Consideraciones sobre el rendimiento

Notas a los autores de las llamadas

Consulte también

Se aplica a

Split(Char, StringSplitOptions)

Parámetros

Devoluciones

Se aplica a

Split(ReadOnlySpan<Char>)

Parámetros

Devoluciones

Se aplica a

Split(String[], Int32, StringSplitOptions)

Parámetros

Devoluciones

Excepciones

Ejemplos

Comentarios

Matriz separadora

Detalles de comparación

Consideraciones sobre el rendimiento

Notas a los autores de las llamadas