Hashtable.CopyTo(Array, Int32) Methode

Referenz

Definition

Namespace:: System.Collections

Assemblys:: mscorlib.dll, System.Collections.NonGeneric.dll

Assembly:: System.Runtime.dll

Assembly:: System.Collections.NonGeneric.dll

Assembly:: System.Runtime.Extensions.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Wichtig

Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.

Kopiert die Hashtable-Elemente an den angegebenen Index in einer eindimensionalen Array-Instanz.

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

Public Overridable Sub CopyTo (array As Array, arrayIndex As Integer)

Parameter

array: Array

Das eindimensionale Array, das das Ziel der aus DictionaryEntry kopierten Hashtable-Objekte ist. Für das Array muss eine nullbasierte Indizierung verwendet werden.

arrayIndex: Int32

Der nullbasierte Index im array, bei dem der Kopiervorgang beginnt.

Implementiert

CopyTo(Array, Int32)

Ausnahmen

ArgumentNullException

array ist null.

ArgumentOutOfRangeException

arrayIndex ist kleiner als Null.

ArgumentException

array ist mehrdimensional.

- oder - Die Anzahl der Elemente in der Quell-Hashtable ist größer als der verfügbare Platz vom arrayIndex bis zum Ende des Ziel-arrays.

InvalidCastException

Der Typ der Quell-Hashtable kann nicht automatisch in den Typ des Ziel-array umgewandelt werden.

Beispiele

Das folgende Beispiel zeigt, wie Sie die Liste der Schlüssel oder die Liste der Werte in einer Hashtable eindimensionalen ArrayDatei kopieren.

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.
      var mySourceHT = new Hashtable();
      mySourceHT.Add("A", "valueA");
      mySourceHT.Add("B", "valueB");

      // Creates and initializes the one-dimensional target Array.
      var 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($"{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.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

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

End Class


' 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 A B dog
' After copying the values, starting at index 6:
'  The quick brown fox jumps over valueA valueB dog

Hinweise

Die Elemente werden in die gleiche Reihenfolge kopiert Array , in der der Aufzählungsator durch die HashtableEnumerator durchlaufen wird.

Verwenden Sie , um nur die Tasten im , verwenden SieHashtable.Keys.CopyTo, um nur die Tasten zu Hashtablekopieren.

Verwenden Sie , um nur die Werte im , verwenden SieHashtable.Values.CopyTo, um nur die Werte zu Hashtablekopieren.

Diese Methode ist ein Vorgang, wobei n es sich um einen O(n) Vorgang handeltCount.

Gilt für