StringCollection.CopyTo-Methode

Kopiert alle StringCollection-Werte beginnend am angegebenen Index des Zielarrays in ein eindimensionales Zeichenfolgenarray.

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

Syntax

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

instance.CopyTo(array, index)

public void CopyTo (
    string[] array,
    int index
)

public:
void CopyTo (
    array<String^>^ array, 
    int index
)

public void CopyTo (
    String[] array, 
    int index
)

public function CopyTo (
    array : String[], 
    index : int
)

Parameter

array
Das eindimensionale Zeichenfolgenarray, das das Ziel der aus StringCollection kopierten Elemente ist. Für Array muss eine nullbasierte Indizierung verwendet werden.

index
Der nullbasierte Index in array, ab dem kopiert wird.

Ausnahmen

Ausnahmetyp	Bedingung
ArgumentNullException	array ist NULL (Nothing in Visual Basic).
ArgumentOutOfRangeException	index ist kleiner als 0 (null).
ArgumentException	Das array ist mehrdimensional. - oder - index ist größer oder gleich der Länge von array. - oder - Die Anzahl der aus der Quell-StringCollection zu kopierenden Elemente ist größer als der verfügbare Platz von index bis zum Ende des Ziel-array.
InvalidCastException	Der Typ der Quell-StringCollection kann nicht automatisch in den Typ des Ziel-array umgewandelt werden.

Hinweise

Der Typ des angegebenen Arrays muss kompatibel sein.

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

Diese Methode ist eine O(n)-Operation, wobei n gleich Count ist.

Beispiel

Im folgenden Codebeispiel wird eine StringCollection in ein Array kopiert.

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

Public Class SamplesStringCollection   

   Public Shared Sub Main()

      ' Creates and initializes a new StringCollection.
      Dim myCol As New StringCollection()
      Dim myArr() As [String] = {"RED", "orange", "yellow", "RED", "green", "blue", "RED", "indigo", "violet", "RED"}
      myCol.AddRange(myArr)

      Console.WriteLine("Initial contents of the StringCollection:")
      PrintValues(myCol)

      ' Copies the collection to a new array starting at index 0.
      Dim myArr2(myCol.Count) As [String]
      myCol.CopyTo(myArr2, 0)

      Console.WriteLine("The new array contains:")
      Dim i As Integer
      For i = 0 To myArr2.Length - 1
         Console.WriteLine("   [{0}] {1}", i, myArr2(i))
      Next i
      Console.WriteLine()

   End Sub 'Main

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

End Class 'SamplesStringCollection 


'This code produces the following output.
'
'Initial contents of the StringCollection:
'   RED
'   orange
'   yellow
'   RED
'   green
'   blue
'   RED
'   indigo
'   violet
'   RED
'
'The new array contains:
'   [0] RED
'   [1] orange
'   [2] yellow
'   [3] RED
'   [4] green
'   [5] blue
'   [6] RED
'   [7] indigo
'   [8] violet
'   [9] RED
'

using System;
using System.Collections;
using System.Collections.Specialized;

public class SamplesStringCollection  {

   public static void Main()  {

      // Creates and initializes a new StringCollection.
      StringCollection myCol = new StringCollection();
      String[] myArr = new String[] { "RED", "orange", "yellow", "RED", "green", "blue", "RED", "indigo", "violet", "RED" };
      myCol.AddRange( myArr );

      Console.WriteLine( "Initial contents of the StringCollection:" );
      PrintValues( myCol );

      // Copies the collection to a new array starting at index 0.
      String[] myArr2 = new String[myCol.Count];
      myCol.CopyTo( myArr2, 0 );

      Console.WriteLine( "The new array contains:" );
      for ( int i = 0; i < myArr2.Length; i++ )  {
         Console.WriteLine( "   [{0}] {1}", i, myArr2[i] );
      }
      Console.WriteLine();

   }

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

}

/*
This code produces the following output.

Initial contents of the StringCollection:
   RED
   orange
   yellow
   RED
   green
   blue
   RED
   indigo
   violet
   RED

The new array contains:
   [0] RED
   [1] orange
   [2] yellow
   [3] RED
   [4] green
   [5] blue
   [6] RED
   [7] indigo
   [8] violet
   [9] RED

*/

#using <System.dll>

using namespace System;
using namespace System::Collections;
using namespace System::Collections::Specialized;
void PrintValues( IEnumerable^ myCol );
int main()
{
   
   // Creates and initializes a new StringCollection.
   StringCollection^ myCol = gcnew StringCollection;
   array<String^>^myArr = {"RED","orange","yellow","RED","green","blue","RED","indigo","violet","RED"};
   myCol->AddRange( myArr );
   Console::WriteLine( "Initial contents of the StringCollection:" );
   PrintValues( myCol );
   
   // Copies the collection to a new array starting at index 0.
   array<String^>^myArr2 = gcnew array<String^>(myCol->Count);
   myCol->CopyTo( myArr2, 0 );
   Console::WriteLine( "The new array contains:" );
   for ( int i = 0; i < myArr2->Length; i++ )
   {
      Console::WriteLine( "   [{0}] {1}", i, myArr2[ i ] );

   }
   Console::WriteLine();
}

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

   Console::WriteLine();
}

/*
This code produces the following output.

Initial contents of the StringCollection:
   RED
   orange
   yellow
   RED
   green
   blue
   RED
   indigo
   violet
   RED

The new array contains:
   [0] RED
   [1] orange
   [2] yellow
   [3] RED
   [4] green
   [5] blue
   [6] RED
   [7] indigo
   [8] violet
   [9] RED

*/

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

public class SamplesStringCollection
{    
    public static void main(String[] args)
    {        
        // Creates and initializes a new StringCollection.
        StringCollection myCol =  new StringCollection();
        String myArr[] = new String[] { "RED", "orange", "yellow", "RED",
            "green", "blue", "RED", "indigo", "violet", "RED" };
        myCol.AddRange(myArr);
        
        Console.WriteLine("Initial contents of the StringCollection:");
        PrintValues(myCol);
        
        // Copies the collection to a new array starting at index 0.
        String myArr2[] = new String[myCol.get_Count()];
        myCol.CopyTo(myArr2, 0);
        
        Console.WriteLine("The new array contains:");
        for (int i=0; i < myArr2.length; i++) {        
            Console.WriteLine("   [{0}] {1}",System.Convert.ToString(i),
                myArr2.get_Item(i));
        } 
        Console.WriteLine();
    } //main

    public static void PrintValues(IEnumerable myCol)
    {
        Object obj = null;
        IEnumerator objEnum = myCol.GetEnumerator();

        while (objEnum.MoveNext()) {        
            obj = objEnum.get_Current();
            Console.WriteLine("   {0}", obj);
        }

        Console.WriteLine();
    } //PrintValues
} //SamplesStringCollection 

/*
This code produces the following output.

Initial contents of the StringCollection:
   RED
   orange
   yellow
   RED
   green
   blue
   RED
   indigo
   violet
   RED

The new array contains:
   [0] RED
   [1] orange
   [2] yellow
   [3] RED
   [4] green
   [5] blue
   [6] RED
   [7] indigo
   [8] violet
   [9] RED

*/

Plattformen

Windows 98, Windows 2000 SP4, Windows Millennium Edition, 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

Siehe auch

Referenz

StringCollection-Klasse
StringCollection-Member
System.Collections.Specialized-Namespace
Array-Klasse
GetEnumerator

Last updated on 2007-08-20

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