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ListDictionary.CopyTo-Methode

Kopiert die ListDictionary-Einträge an den angegebenen Index in einer eindimensionalen Array-Instanz.

Namespace: System.Collections.Specialized
Assembly: System (in system.dll)

Syntax

'Declaration
Public Sub CopyTo ( _
    array As Array, _
    index As Integer _
)
'Usage
Dim instance As ListDictionary
Dim array As Array
Dim index As Integer

instance.CopyTo(array, index)
public void CopyTo (
    Array array,
    int index
)
public:
virtual void CopyTo (
    Array^ array, 
    int index
) sealed
public final void CopyTo (
    Array array, 
    int index
)
public final function CopyTo (
    array : Array, 
    index : int
)

Parameter

  • array
    Das eindimensionale Array, das das Ziel der aus ListDictionary kopierten DictionaryEntry-Objekte ist. Für Array muss eine nullbasierte Indizierung verwendet werden.
  • index
    Der nullbasierte Index im array, an dem der Kopiervorgang beginnt.

Ausnahmen

Ausnahmetyp Bedingung

ArgumentNullException

array ist NULL (Nothing in Visual Basic).

ArgumentOutOfRangeException

index ist kleiner als 0 (null).

ArgumentException

array ist mehrdimensional.

- oder -

index ist größer oder gleich der Länge von array.

- oder -

Die Anzahl der aus dem Quell-ListDictionary zu kopierenden Elemente ist größer als der verfügbare Platz von index bis zum Ende des Ziel-array.

InvalidCastException

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

Hinweise

Die Elemente werden in derselben Reihenfolge nach Array kopiert, in der der Enumerator ListDictionary durchläuft.

Verwenden Sie ListDictionary.Keys.CopyTo, wenn Sie lediglich die Schlüssel im ListDictionary kopieren möchten.

Verwenden Sie ListDictionary.Values.CopyTo, wenn Sie lediglich die Werte im ListDictionary kopieren möchten.

Diese Methode ist ein O(n)-Vorgang, wobei n der Count ist.

Beispiel

Im folgenden Codebeispiel werden die Elemente von ListDictionary in ein Array kopiert.

Imports System
Imports System.Collections
Imports System.Collections.Specialized

Public Class SamplesListDictionary   

   Public Shared Sub Main()

      ' Creates and initializes a new ListDictionary.
      Dim myCol As New ListDictionary()
      myCol.Add("Braeburn Apples", "1.49")
      myCol.Add("Fuji Apples", "1.29")
      myCol.Add("Gala Apples", "1.49")
      myCol.Add("Golden Delicious Apples", "1.29")
      myCol.Add("Granny Smith Apples", "0.89")
      myCol.Add("Red Delicious Apples", "0.99")

      ' Displays the values in the ListDictionary in three different ways.
      Console.WriteLine("Initial contents of the ListDictionary:")
      PrintKeysAndValues(myCol)

      ' Copies the ListDictionary to an array with DictionaryEntry elements.
      Dim myArr(myCol.Count) As DictionaryEntry
      myCol.CopyTo(myArr, 0)

      ' Displays the values in the array.
      Console.WriteLine("Displays the elements in the array:")
      Console.WriteLine("   KEY                       VALUE")
      Dim i As Integer
      For i = 0 To myArr.Length - 1
         Console.WriteLine("   {0,-25} {1}", myArr(i).Key, myArr(i).Value)
      Next i
      Console.WriteLine()

   End Sub 'Main

   Public Shared Sub PrintKeysAndValues(myCol As IDictionary)

      Console.WriteLine("   KEY                       VALUE")
      Dim de As DictionaryEntry
      For Each de In  myCol
         Console.WriteLine("   {0,-25} {1}", de.Key, de.Value)
      Next de
      Console.WriteLine()

   End Sub 'PrintKeysAndValues

End Class 'SamplesListDictionary 


'This code produces the following output.
'
'Initial contents of the ListDictionary:
'   KEY                       VALUE
'   Braeburn Apples           1.49
'   Fuji Apples               1.29
'   Gala Apples               1.49
'   Golden Delicious Apples   1.29
'   Granny Smith Apples       0.89
'   Red Delicious Apples      0.99
'
'Displays the elements in the array:
'   KEY                       VALUE
'   Braeburn Apples           1.49
'   Fuji Apples               1.29
'   Gala Apples               1.49
'   Golden Delicious Apples   1.29
'   Granny Smith Apples       0.89
'   Red Delicious Apples      0.99
using System;
using System.Collections;
using System.Collections.Specialized;

public class SamplesListDictionary  {

   public static void Main()  {

      // Creates and initializes a new ListDictionary.
      ListDictionary myCol = new ListDictionary();
      myCol.Add( "Braeburn Apples", "1.49" );
      myCol.Add( "Fuji Apples", "1.29" );
      myCol.Add( "Gala Apples", "1.49" );
      myCol.Add( "Golden Delicious Apples", "1.29" );
      myCol.Add( "Granny Smith Apples", "0.89" );
      myCol.Add( "Red Delicious Apples", "0.99" );

      // Displays the values in the ListDictionary in three different ways.
      Console.WriteLine( "Initial contents of the ListDictionary:" );
      PrintKeysAndValues( myCol );

      // Copies the ListDictionary to an array with DictionaryEntry elements.
      DictionaryEntry[] myArr = new DictionaryEntry[myCol.Count];
      myCol.CopyTo( myArr, 0 );

      // Displays the values in the array.
      Console.WriteLine( "Displays the elements in the array:" );
      Console.WriteLine( "   KEY                       VALUE" );
      for ( int i = 0; i < myArr.Length; i++ )
         Console.WriteLine( "   {0,-25} {1}", myArr[i].Key, myArr[i].Value );
      Console.WriteLine();

   }

   public static void PrintKeysAndValues( IDictionary myCol )  {
      Console.WriteLine( "   KEY                       VALUE" );
      foreach ( DictionaryEntry de in myCol )
         Console.WriteLine( "   {0,-25} {1}", de.Key, de.Value );
      Console.WriteLine();
   }

}


/*
This code produces the following output.

Initial contents of the ListDictionary:
   KEY                       VALUE
   Braeburn Apples           1.49
   Fuji Apples               1.29
   Gala Apples               1.49
   Golden Delicious Apples   1.29
   Granny Smith Apples       0.89
   Red Delicious Apples      0.99

Displays the elements in the array:
   KEY                       VALUE
   Braeburn Apples           1.49
   Fuji Apples               1.29
   Gala Apples               1.49
   Golden Delicious Apples   1.29
   Granny Smith Apples       0.89
   Red Delicious Apples      0.99

*/
#using <System.dll>

using namespace System;
using namespace System::Collections;
using namespace System::Collections::Specialized;
void PrintKeysAndValues( IDictionary^ myCol )
{
   Console::WriteLine( "   KEY                       VALUE" );
   IEnumerator^ myEnum = myCol->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      DictionaryEntry de = safe_cast<DictionaryEntry>(myEnum->Current);
      Console::WriteLine( "   {0,-25} {1}", de.Key, de.Value );
   }

   Console::WriteLine();
}

int main()
{
   
   // Creates and initializes a new ListDictionary.
   ListDictionary^ myCol = gcnew ListDictionary;
   myCol->Add( "Braeburn Apples", "1.49" );
   myCol->Add( "Fuji Apples", "1.29" );
   myCol->Add( "Gala Apples", "1.49" );
   myCol->Add( "Golden Delicious Apples", "1.29" );
   myCol->Add( "Granny Smith Apples", "0.89" );
   myCol->Add( "Red Delicious Apples", "0.99" );
   
   // Displays the values in the ListDictionary in three different ways.
   Console::WriteLine( "Initial contents of the ListDictionary:" );
   PrintKeysAndValues( myCol );
   
   // Copies the ListDictionary to an array with DictionaryEntry elements.
   array<DictionaryEntry>^myArr = gcnew array<DictionaryEntry>(myCol->Count);
   myCol->CopyTo( myArr, 0 );
   
   // Displays the values in the array.
   Console::WriteLine( "Displays the elements in the array:" );
   Console::WriteLine( "   KEY                       VALUE" );
   for ( int i = 0; i < myArr->Length; i++ )
      Console::WriteLine( "   {0,-25} {1}", myArr[ i ].Key, myArr[ i ].Value );
   Console::WriteLine();
}

/*
This code produces the following output.

Initial contents of the ListDictionary:
   KEY                       VALUE
   Braeburn Apples           1.49
   Fuji Apples               1.29
   Gala Apples               1.49
   Golden Delicious Apples   1.29
   Granny Smith Apples       0.89
   Red Delicious Apples      0.99

Displays the elements in the array:
   KEY                       VALUE
   Braeburn Apples           1.49
   Fuji Apples               1.29
   Gala Apples               1.49
   Golden Delicious Apples   1.29
   Granny Smith Apples       0.89
   Red Delicious Apples      0.99

*/
import System.*;
import System.Collections.*;
import System.Collections.Specialized.*;

public class SamplesListDictionary
{
       public static void main(String[] args)
       {
        // Creates and initializes a new ListDictionary.
        ListDictionary myCol = new ListDictionary();
        myCol.Add("Braeburn Apples", "1.49");
        myCol.Add("Fuji Apples", "1.29");
        myCol.Add("Gala Apples", "1.49");
        myCol.Add("Golden Delicious Apples", "1.29");
        myCol.Add("Granny Smith Apples", "0.89");
        myCol.Add("Red Delicious Apples", "0.99");
      
        // Displays the values in the ListDictionary in three different ways.
        Console.WriteLine("Initial contents of the ListDictionary:");
        PrintKeysAndValues(myCol);
      
        // Copies the ListDictionary to an array with DictionaryEntry elements.
        DictionaryEntry myArr[] = new DictionaryEntry[myCol.get_Count()];
        myCol.CopyTo(myArr, 0);
      
        // Displays the values in the array.
        Console.WriteLine("Displays the elements in the array:");
        Console.WriteLine("   KEY                       VALUE");
        for(int i=0; i < myArr.length; i++) {
            Console.WriteLine("   {0,-25} {1}", myArr[i].get_Key(),
            myArr[i].get_Value());
        } 
        Console.WriteLine();
    } //main
       
    public static void PrintKeysAndValues(IDictionary myCol)
    {
        IEnumerator myEnumerator = myCol.GetEnumerator();
        DictionaryEntry de;
        Console.WriteLine("   KEY                       VALUE");
        while (myEnumerator.MoveNext()) {
             de = (DictionaryEntry)(myEnumerator.get_Current());
            Console.WriteLine("   {0,-25} {1}", de.get_Key(), de.get_Value());
        }
        Console.WriteLine();
    } //PrintKeysAndValues
} //SamplesListDictionary
 
/*
This code produces the following output.

Initial contents of the ListDictionary:
   KEY                       VALUE
   Braeburn Apples           1.49
   Fuji Apples               1.29
   Gala Apples               1.49
   Golden Delicious Apples   1.29
   Granny Smith Apples       0.89
   Red Delicious Apples      0.99

Displays the elements in the array:
   KEY                       VALUE
   Braeburn Apples           1.49
   Fuji Apples               1.29
   Gala Apples               1.49
   Golden Delicious Apples   1.29
   Granny Smith Apples       0.89
   Red Delicious Apples      0.99

*/

Plattformen

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

.NET Compact Framework

Unterstützt in: 2.0, 1.0

Siehe auch

Referenz

ListDictionary-Klasse
ListDictionary-Member
System.Collections.Specialized-Namespace
Array-Klasse
DictionaryEntry-Struktur
GetEnumerator