Hashtable.CopyTo(Array, Int32) Hashtable.CopyTo(Array, Int32) Hashtable.CopyTo(Array, Int32) Method

Definition

Kopiert die Hashtable-Elemente an den angegebenen Index in einer eindimensionalen Array-Instanz.Copies the Hashtable elements to a one-dimensional Array instance at the specified index.

public:
 virtual void CopyTo(Array ^ array, int arrayIndex);
public virtual void CopyTo (Array array, int arrayIndex);
abstract member CopyTo : Array * int -> unit
override this.CopyTo : Array * int -> unit

Parameter

array
Array Array Array

Das eindimensionale Array, das das Ziel der aus DictionaryEntry kopierten Hashtable-Objekte ist.The one-dimensional Array that is the destination of the DictionaryEntry objects copied from Hashtable. Für das Array muss eine nullbasierte Indizierung verwendet werden.The Array must have zero-based indexing.

arrayIndex
Int32 Int32 Int32

Der nullbasierte Index im array, bei dem der Kopiervorgang beginnt.The zero-based index in array at which copying begins.

Implementiert

Ausnahmen

arrayIndex ist kleiner als Null.arrayIndex is less than zero.

array ist mehrdimensional.array is multidimensional.

- oder --or- Die Anzahl der Elemente in der Quell-Hashtable ist größer als der verfügbare Platz vom arrayIndex bis zum Ende des Ziel-arrays.The number of elements in the source Hashtable is greater than the available space from arrayIndex to the end of the destination array.

Der Typ der Quell-Hashtable kann nicht automatisch in den Typ des Ziel-array umgewandelt werden.The type of the source Hashtable cannot be cast automatically to the type of the destination array.

Beispiele

Das folgende Beispiel zeigt, wie Sie die Liste der Schlüssel oder die Liste der Werte im Kopieren einer Hashtable in ein eindimensionales Array.The following example shows how to copy the list of keys or the list of values in a Hashtable into a one-dimensional Array.

using namespace System;
using namespace System::Collections;
void PrintValues( array<String^>^myArr, char mySeparator );
int main()
{
   
   // Creates and initializes the source Hashtable.
   Hashtable^ mySourceHT = gcnew Hashtable;
   mySourceHT->Add( "A", "valueA" );
   mySourceHT->Add( "B", "valueB" );
   
   // Creates and initializes the one-dimensional target Array.
   array<String^>^myTargetArray = gcnew array<String^>(15);
   myTargetArray[ 0 ] = "The";
   myTargetArray[ 1 ] = "quick";
   myTargetArray[ 2 ] = "brown";
   myTargetArray[ 3 ] = "fox";
   myTargetArray[ 4 ] = "jumps";
   myTargetArray[ 5 ] = "over";
   myTargetArray[ 6 ] = "the";
   myTargetArray[ 7 ] = "lazy";
   myTargetArray[ 8 ] = "dog";
   
   // Displays the values of the target Array.
   Console::WriteLine( "The target Array contains the following before:" );
   PrintValues( myTargetArray, ' ' );
   
   // Copies the keys in the source Hashtable to the target Hashtable, starting at index 6.
   Console::WriteLine( "After copying the keys, starting at index 6:" );
   mySourceHT->Keys->CopyTo( myTargetArray, 6 );
   
   // Displays the values of the target Array.
   PrintValues( myTargetArray, ' ' );
   
   // Copies the values in the source Hashtable to the target Hashtable, starting at index 6.
   Console::WriteLine( "After copying the values, starting at index 6:" );
   mySourceHT->Values->CopyTo( myTargetArray, 6 );
   
   // Displays the values of the target Array.
   PrintValues( myTargetArray, ' ' );
}

void PrintValues( array<String^>^myArr, char mySeparator )
{
   for ( int i = 0; i < myArr->Length; i++ )
      Console::Write( "{0}{1}", mySeparator, myArr[ i ] );
   Console::WriteLine();
}

/* 
 This code produces the following output.
 
 The target Array contains the following before:
  The quick brown fox jumps over the lazy dog
 After copying the keys, starting at index 6:
  The quick brown fox jumps over B A dog
 After copying the values, starting at index 6:
  The quick brown fox jumps over valueB valueA dog

 */
using System;
using System.Collections;
public class SamplesHashtable  {

   public static void Main()  {

      // Creates and initializes the source Hashtable.
      Hashtable mySourceHT = new Hashtable();
      mySourceHT.Add( "A", "valueA" );
      mySourceHT.Add( "B", "valueB" );

      // Creates and initializes the one-dimensional target Array.
      String[] myTargetArray = new String[15];
      myTargetArray[0] = "The";
      myTargetArray[1] = "quick";
      myTargetArray[2] = "brown";
      myTargetArray[3] = "fox";
      myTargetArray[4] = "jumps";
      myTargetArray[5] = "over";
      myTargetArray[6] = "the";
      myTargetArray[7] = "lazy";
      myTargetArray[8] = "dog";

      // Displays the values of the target Array.
      Console.WriteLine( "The target Array contains the following before:" );
      PrintValues( myTargetArray, ' ' );

      // Copies the keys in the source Hashtable to the target Hashtable, starting at index 6.
      Console.WriteLine( "After copying the keys, starting at index 6:" );
      mySourceHT.Keys.CopyTo( myTargetArray, 6 );

      // Displays the values of the target Array.
      PrintValues( myTargetArray, ' ' );

      // Copies the values in the source Hashtable to the target Hashtable, starting at index 6.
      Console.WriteLine( "After copying the values, starting at index 6:" );
      mySourceHT.Values.CopyTo( myTargetArray, 6 );

      // Displays the values of the target Array.
      PrintValues( myTargetArray, ' ' );
   }

   public static void PrintValues( String[] myArr, char mySeparator )  {
      for ( int i = 0; i < myArr.Length; i++ )
         Console.Write( "{0}{1}", mySeparator, myArr[i] );
      Console.WriteLine();
   }
}
/* 
This code produces the following output.

The target Array contains the following before:
 The quick brown fox jumps over the lazy dog
After copying the keys, starting at index 6:
 The quick brown fox jumps over B A dog
After copying the values, starting at index 6:
 The quick brown fox jumps over valueB valueA dog

*/ 
Imports System
Imports System.Collections

Public Class SamplesHashtable

    Public Shared Sub Main()

        ' Creates and initializes the source Hashtable.
        Dim mySourceHT As New Hashtable()
        mySourceHT.Add("A", "valueA")
        mySourceHT.Add("B", "valueB")

        ' Creates and initializes the one-dimensional target Array.
        Dim myTargetArray(14) As String
        myTargetArray(0) = "The"
        myTargetArray(1) = "quick"
        myTargetArray(2) = "brown"
        myTargetArray(3) = "fox"
        myTargetArray(4) = "jumps"
        myTargetArray(5) = "over"
        myTargetArray(6) = "the"
        myTargetArray(7) = "lazy"
        myTargetArray(8) = "dog"

        ' Displays the values of the target Array.
        Console.WriteLine("The target Array contains the following before:")
        PrintValues(myTargetArray, " "c)

        ' Copies the keys in the source Hashtable to the target Hashtable, starting at index 6.
        Console.WriteLine("After copying the keys, starting at index 6:")
        mySourceHT.Keys.CopyTo(myTargetArray, 6)

        ' Displays the values of the target Array.
        PrintValues(myTargetArray, " "c)

        ' Copies the values in the source Hashtable to the target Hashtable, starting at index 6.
        Console.WriteLine("After copying the values, starting at index 6:")
        mySourceHT.Values.CopyTo(myTargetArray, 6)

        ' Displays the values of the target Array.
        PrintValues(myTargetArray, " "c)

    End Sub 'Main

    Public Shared Sub PrintValues(myArr() As String, mySeparator As Char)
        Dim i As Integer
        For i = 0 To myArr.Length - 1
            Console.Write("{0}{1}", mySeparator, myArr(i))
        Next i
        Console.WriteLine()
    End Sub 'PrintValues

End Class 'SamplesHashtable


' This code produces the following output.
' 
' The target Array contains the following before:
'  The quick brown fox jumps over the lazy dog
' After copying the keys, starting at index 6:
'  The quick brown fox jumps over B A dog
' After copying the values, starting at index 6:
'  The quick brown fox jumps over valueB valueA dog

Hinweise

Die Elemente kopiert werden, auf die Array in der gleichen Reihenfolge, in dem sich der Enumerator durchläuft, die Hashtable.The elements are copied to the Array in the same order in which the enumerator iterates through the Hashtable.

Kopieren Sie nur die Schlüssel in der Hashtable, verwenden Sie Hashtable.Keys.CopyTo.To copy only the keys in the Hashtable, use Hashtable.Keys.CopyTo.

Kopieren Sie nur die Werte in der Hashtable, verwenden Sie Hashtable.Values.CopyTo.To copy only the values in the Hashtable, use Hashtable.Values.CopyTo.

Diese Methode ist eine O (n)-Vorgang, in denen n ist Count.This method is an O(n) operation, where n is Count.

Gilt für:

Siehe auch