BitArray.CopyTo(Array, Int32) Méthode

  • Référence

Définition

Espace de noms:
System.Collections
Assembly:
System.Collections.dll
Assembly:
mscorlib.dll
Assembly:
netstandard.dll
Source:
BitArray.cs
Source:
BitArray.cs
Source:
BitArray.cs

Copie l'ensemble de l'objet BitArray vers un objet Array unidimensionnel compatible, en commençant à l'index spécifié du tableau cible.

public:
 virtual void CopyTo(Array ^ array, int index);
public void CopyTo (Array array, int index);
abstract member CopyTo : Array * int -> unit
override this.CopyTo : Array * int -> unit
Public Sub CopyTo (array As Array, index As Integer)

Paramètres

array
Array

Array unidimensionnel qui constitue la destination des éléments copiés à partir de BitArray. Array doit avoir une indexation de base zéro.

index
Int32

Index de base zéro dans l'array à partir duquel la copie commence.

Implémente

CopyTo(Array, Int32)

Exceptions

ArgumentNullException

array a la valeur null.

ArgumentOutOfRangeException

index est inférieur à zéro.

ArgumentException

array est multidimensionnel.

- ou -

Le nombre d’éléments dans le BitArray source est supérieur à la quantité d’espace disponible entre index et la fin du array de destination.

InvalidCastException

Le type du BitArray source ne peut pas être converti automatiquement en type du array de destination.

Exemples

L’exemple de code suivant montre comment copier un BitArray dans un objet unidimensionnel Array.

using namespace System;
using namespace System::Collections;
void PrintValues( IEnumerable^ myArr );
int main()
{
   // Creates and initializes the source BitArray.
   BitArray^ myBA = gcnew BitArray( 4 );
   myBA[ 0 ] = true;
   myBA[ 1 ] = true;
   myBA[ 2 ] = true;
   myBA[ 3 ] = true;

   // Creates and initializes the one-dimensional target Array of type Boolean.
   array<Boolean>^myBoolArray = gcnew array<Boolean>(8);
   myBoolArray[ 0 ] = false;
   myBoolArray[ 1 ] = false;

   // Displays the values of the target Array.
   Console::WriteLine( "The target Boolean Array contains the following (before and after copying):" );
   PrintValues( dynamic_cast<IEnumerable^>(myBoolArray) );

   // Copies the entire source BitArray to the target BitArray, starting at index 3.
   myBA->CopyTo( myBoolArray, 3 );

   // Displays the values of the target Array.
   PrintValues( dynamic_cast<IEnumerable^>(myBoolArray) );

   // Creates and initializes the one-dimensional target Array of type integer.
   array<Int32>^myIntArray = gcnew array<Int32>(8);
   myIntArray[ 0 ] = 42;
   myIntArray[ 1 ] = 43;

   // Displays the values of the target Array.
   Console::WriteLine( "The target integer Array contains the following (before and after copying):" );
   PrintValues( dynamic_cast<IEnumerable^>(myIntArray) );

   // Copies the entire source BitArray to the target BitArray, starting at index 3.
   myBA->CopyTo( myIntArray, 3 );

   // Displays the values of the target Array.
   PrintValues( dynamic_cast<IEnumerable^>(myIntArray) );

   // Creates and initializes the one-dimensional target Array of type byte.
   Array^ myByteArray = Array::CreateInstance( Byte::typeid, 8 );
   myByteArray->SetValue( (Byte)10, 0 );
   myByteArray->SetValue( (Byte)11, 1 );

   // Displays the values of the target Array.
   Console::WriteLine( "The target byte Array contains the following (before and after copying):" );
   PrintValues( myByteArray );

   // Copies the entire source BitArray to the target BitArray, starting at index 3.
   myBA->CopyTo( myByteArray, 3 );

   // Displays the values of the target Array.
   PrintValues( myByteArray );

   // Returns an exception if the array is not of type Boolean, integer or byte.
   try
   {
      Array^ myStringArray = Array::CreateInstance( String::typeid, 8 );
      myStringArray->SetValue( "Hello", 0 );
      myStringArray->SetValue( "World", 1 );
      myBA->CopyTo( myStringArray, 3 );
   }
   catch ( Exception^ myException ) 
   {
      Console::WriteLine( "Exception: {0}", myException );
   }

}

void PrintValues( IEnumerable^ myArr )
{
   IEnumerator^ myEnum = myArr->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Object^ obj = safe_cast<Object^>(myEnum->Current);
      Console::Write( "{0,8}", obj );
   }

   Console::WriteLine();
}

/* 
 This code produces the following output.
 
 The target Boolean Array contains the following (before and after copying):
    False   False   False   False   False   False   False   False
    False   False   False    True    True    True    True   False
 The target integer Array contains the following (before and after copying):
       42      43       0       0       0       0       0       0
       42      43       0      15       0       0       0       0
 The target byte Array contains the following (before and after copying):
       10      11       0       0       0       0       0       0
       10      11       0      15       0       0       0       0
 Exception: System.ArgumentException: Only supported array types for CopyTo on BitArrays are Boolean[], Int32[] and Byte[].
    at System.Collections.BitArray.CopyTo(Array array, Int32 index)
    at SamplesBitArray.Main()

 */

using System;
using System.Collections;
public class SamplesBitArray  {

   public static void Main()  {

      // Creates and initializes the source BitArray.
      BitArray myBA = new BitArray( 4 );
      myBA[0] = myBA[1] = myBA[2] = myBA[3] = true;

      // Creates and initializes the one-dimensional target Array of type Boolean.
      bool[] myBoolArray = new bool[8];
      myBoolArray[0] = false;
      myBoolArray[1] = false;

      // Displays the values of the target Array.
      Console.WriteLine( "The target Boolean Array contains the following (before and after copying):" );
      PrintValues( myBoolArray );

      // Copies the entire source BitArray to the target BitArray, starting at index 3.
      myBA.CopyTo( myBoolArray, 3 );

      // Displays the values of the target Array.
      PrintValues( myBoolArray );

      // Creates and initializes the one-dimensional target Array of type integer.
      int[] myIntArray = new int[8];
      myIntArray[0] = 42;
      myIntArray[1] = 43;

      // Displays the values of the target Array.
      Console.WriteLine( "The target integer Array contains the following (before and after copying):" );
      PrintValues( myIntArray );

      // Copies the entire source BitArray to the target BitArray, starting at index 3.
      myBA.CopyTo( myIntArray, 3 );

      // Displays the values of the target Array.
      PrintValues( myIntArray );

      // Creates and initializes the one-dimensional target Array of type byte.
      Array myByteArray = Array.CreateInstance( typeof(byte), 8 );
      myByteArray.SetValue( (byte) 10, 0 );
      myByteArray.SetValue( (byte) 11, 1 );

      // Displays the values of the target Array.
      Console.WriteLine( "The target byte Array contains the following (before and after copying):" );
      PrintValues( myByteArray );

      // Copies the entire source BitArray to the target BitArray, starting at index 3.
      myBA.CopyTo( myByteArray, 3 );

      // Displays the values of the target Array.
      PrintValues( myByteArray );

      // Returns an exception if the array is not of type Boolean, integer or byte.
      try  {
         Array myStringArray=Array.CreateInstance( typeof(string), 8 );
         myStringArray.SetValue( "Hello", 0 );
         myStringArray.SetValue( "World", 1 );
         myBA.CopyTo( myStringArray, 3 );
      } catch ( Exception myException )  {
         Console.WriteLine("Exception: " + myException.ToString());
      }
   }

   public static void PrintValues( IEnumerable myArr )  {
      foreach ( Object obj in myArr ) {
         Console.Write( "{0,8}", obj );
      }
      Console.WriteLine();
   }
}


/*
This code produces the following output.

The target Boolean Array contains the following (before and after copying):
   False   False   False   False   False   False   False   False
   False   False   False    True    True    True    True   False
The target integer Array contains the following (before and after copying):
      42      43       0       0       0       0       0       0
      42      43       0      15       0       0       0       0
The target byte Array contains the following (before and after copying):
      10      11       0       0       0       0       0       0
      10      11       0      15       0       0       0       0
Exception: System.ArgumentException: Only supported array types for CopyTo on BitArrays are Boolean[], Int32[] and Byte[].
   at System.Collections.BitArray.CopyTo(Array array, int index)
   at SamplesBitArray.Main()

*/

Imports System.Collections

Public Class SamplesBitArray

    Public Shared Sub Main()

        ' Creates and initializes the source BitArray.
        Dim myBA As New BitArray(4)
        myBA(0) = True
        myBA(1) = True
        myBA(2) = True
        myBA(3) = True

        ' Creates and initializes the one-dimensional target Array of type Boolean.
        Dim myBoolArray(7) As Boolean
        myBoolArray(0) = False
        myBoolArray(1) = False

        ' Displays the values of the target Array.
        Console.WriteLine("The target Boolean Array contains the following (before and after copying):")
        PrintValues(myBoolArray)

        ' Copies the entire source BitArray to the target BitArray, starting at index 3.
        myBA.CopyTo(myBoolArray, 3)

        ' Displays the values of the target Array.
        PrintValues(myBoolArray)

        ' Creates and initializes the one-dimensional target Array of type integer.
        Dim myIntArray(7) As Integer
        myIntArray(0) = 42
        myIntArray(1) = 43

        ' Displays the values of the target Array.
        Console.WriteLine("The target integer Array contains the following (before and after copying):")
        PrintValues(myIntArray)

        ' Copies the entire source BitArray to the target BitArray, starting at index 3.
        myBA.CopyTo(myIntArray, 3)

        ' Displays the values of the target Array.
        PrintValues(myIntArray)

        ' Creates and initializes the one-dimensional target Array of type byte.
        Dim myByteArray As Array = Array.CreateInstance(GetType(Byte), 8)
        myByteArray.SetValue(System.Convert.ToByte(10), 0)
        myByteArray.SetValue(System.Convert.ToByte(11), 1)

        ' Displays the values of the target Array.
        Console.WriteLine("The target byte Array contains the following (before and after copying):")
        PrintValues(myByteArray)

        ' Copies the entire source BitArray to the target BitArray, starting at index 3.
        myBA.CopyTo(myByteArray, 3)

        ' Displays the values of the target Array.
        PrintValues(myByteArray)

        ' Returns an exception if the array is not of type Boolean, integer or byte.
        Try
            Dim myStringArray As Array = Array.CreateInstance(GetType(String), 8)
            myStringArray.SetValue("Hello", 0)
            myStringArray.SetValue("World", 1)
            myBA.CopyTo(myStringArray, 3)
        Catch myException As Exception
            Console.WriteLine("Exception: " + myException.ToString())
        End Try

    End Sub

    Public Shared Sub PrintValues(myArr As IEnumerable)
        Dim obj As [Object]
        For Each obj In  myArr
            Console.Write("{0,8}", obj)
        Next obj
        Console.WriteLine()
    End Sub

End Class


' This code produces the following output.
' 
' The target Boolean Array contains the following (before and after copying):
'    False   False   False   False   False   False   False   False
'    False   False   False    True    True    True    True   False
' The target integer Array contains the following (before and after copying):
'       42      43       0       0       0       0       0       0
'       42      43       0      15       0       0       0       0
' The target byte Array contains the following (before and after copying):
'       10      11       0       0       0       0       0       0
'       10      11       0      15       0       0       0       0
' Exception: System.ArgumentException: Only supported array types for CopyTo on BitArrays are Boolean[], Int32[] and Byte[].
'    at System.Collections.BitArray.CopyTo(Array array, Int32 index)
'    at SamplesBitArray.Main()

Remarques

Le tableau spécifié doit être d’un type compatible. Seuls boolles types de tableaux , intet byte sont pris en charge.

Cette méthode utilise Array.Copy pour copier les éléments.

Cette méthode est une O(n) opération, où n est Count.

S’applique à

Voir aussi