StringDictionary.Remove-Methode

Entfernt den Eintrag mit dem angegebenen Schlüssel aus dem Zeichenfolgenwörterbuch.

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

Syntax

'Declaration
Public Overridable Sub Remove ( _
    key As String _
)
'Usage
Dim instance As StringDictionary
Dim key As String

instance.Remove(key)

public virtual void Remove (
    string key
)

public:
virtual void Remove (
    String^ key
)

public void Remove (
    String key
)

public function Remove (
    key : String
)

Parameter

• key
  Der Schlüssel des zu entfernenden Eintrags.

Ausnahmen

Ausnahmetyp	Bedingung
ArgumentNullException	Der Schlüssel ist NULL (Nothing in Visual Basic).
NotSupportedException	Das StringDictionary ist schreibgeschützt.

Hinweise

Wenn StringDictionary kein Element mit dem angegebenen Schlüssel enthält, bleibt StringDictionary unverändert. Es wird keine Ausnahme ausgelöst.

Die Groß- und Kleinschreibung des Schlüssels wird nicht berücksichtigt. Er wird in Kleinbuchstaben konvertiert, bevor er für die Suche des Eintrags verwendet wird, der aus dem Zeichenfolgenwörterbuch entfernt werden soll.

Diese Methode ist eine O(1)-Operation.

Beispiel

Im folgenden Codebeispiel wird veranschaulicht, wie Elemente StringDictionary hinzugefügt und aus diesem entfernt werden.

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

Public Class SamplesStringDictionary   

   Public Shared Sub Main()

      ' Creates and initializes a new StringDictionary.
      Dim myCol As New StringDictionary()
      myCol.Add("red", "rojo")
      myCol.Add("green", "verde")
      myCol.Add("blue", "azul")

      ' Displays the values in the StringDictionary.
      Console.WriteLine("Initial contents of the StringDictionary:")
      PrintKeysAndValues(myCol)

      ' Deletes an element.
      myCol.Remove("green")
      Console.WriteLine("The collection contains the following elements after removing ""green"":")
      PrintKeysAndValues(myCol)

      ' Clears the entire collection.
      myCol.Clear()
      Console.WriteLine("The collection contains the following elements after it is cleared:")
      PrintKeysAndValues(myCol)

   End Sub 'Main

   Public Shared Sub PrintKeysAndValues(myCol As StringDictionary)
      Dim de As DictionaryEntry

      Console.WriteLine("   KEY        VALUE")
      For Each de In  myCol
         Console.WriteLine("   {0,-10} {1}", de.Key, de.Value)
      Next de
      Console.WriteLine()

   End Sub 'PrintKeysAndValues

End Class 'SamplesStringDictionary 


'This code produces the following output.
'
'Initial contents of the StringDictionary:
'   KEY        VALUE
'   green      verde
'   red        rojo
'   blue       azul
'
'The collection contains the following elements after removing "green":
'   KEY        VALUE
'   red        rojo
'   blue       azul
'
'The collection contains the following elements after it is cleared:
'   KEY        VALUE
'

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

public class SamplesStringDictionary  {

   public static void Main()  {

      // Creates and initializes a new StringDictionary.
      StringDictionary myCol = new StringDictionary();
      myCol.Add( "red", "rojo" );
      myCol.Add( "green", "verde" );
      myCol.Add( "blue", "azul" );

      // Displays the values in the StringDictionary.
      Console.WriteLine( "Initial contents of the StringDictionary:" );
      PrintKeysAndValues( myCol );

      // Deletes an element.
      myCol.Remove( "green" );
      Console.WriteLine( "The collection contains the following elements after removing \"green\":" );
      PrintKeysAndValues( myCol );

      // Clears the entire collection.
      myCol.Clear();
      Console.WriteLine( "The collection contains the following elements after it is cleared:" );
      PrintKeysAndValues( myCol );

   }

   public static void PrintKeysAndValues( StringDictionary myCol )  {
      Console.WriteLine( "   KEY        VALUE" );
      foreach ( DictionaryEntry de in myCol )
         Console.WriteLine( "   {0,-10} {1}", de.Key, de.Value );
      Console.WriteLine();
   }

}

/*
This code produces the following output.

Initial contents of the StringDictionary:
   KEY        VALUE
   green      verde
   red        rojo
   blue       azul

The collection contains the following elements after removing "green":
   KEY        VALUE
   red        rojo
   blue       azul

The collection contains the following elements after it is cleared:
   KEY        VALUE

*/

#using <System.dll>

using namespace System;
using namespace System::Collections;
using namespace System::Collections::Specialized;
void PrintKeysAndValues( StringDictionary^ myCol )
{
   Console::WriteLine( "   KEY        VALUE" );
   IEnumerator^ enum0 = myCol->GetEnumerator();
   while ( enum0->MoveNext() )
   {
      DictionaryEntry^ de = safe_cast<DictionaryEntry^>(enum0->Current);
      Console::WriteLine( "   {0,-10} {1}", de->Key, de->Value );
   }

   Console::WriteLine();
}

int main()
{
   
   // Creates and initializes a new StringDictionary.
   StringDictionary^ myCol = gcnew StringDictionary;
   myCol->Add( "red", "rojo" );
   myCol->Add( "green", "verde" );
   myCol->Add( "blue", "azul" );
   
   // Displays the values in the StringDictionary.
   Console::WriteLine( "Initial contents of the StringDictionary:" );
   PrintKeysAndValues( myCol );
   
   // Deletes an element.
   myCol->Remove( "green" );
   Console::WriteLine( "The collection contains the following elements after removing \"green\":" );
   PrintKeysAndValues( myCol );
   
   // Clears the entire collection.
   myCol->Clear();
   Console::WriteLine( "The collection contains the following elements after it is cleared:" );
   PrintKeysAndValues( myCol );
}

/*
This code produces the following output.

Initial contents of the StringDictionary:
   KEY        VALUE
   green      verde
   red        rojo
   blue       azul

The collection contains the following elements after removing "green":
   KEY        VALUE
   red        rojo
   blue       azul

The collection contains the following elements after it is cleared:
   KEY        VALUE

*/

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

public class SamplesStringDictionary
{
    public static void main(String[] args)
    {
        // Creates and initializes a new StringDictionary.
        StringDictionary myCol = new StringDictionary();

        myCol.Add("red", "rojo");
        myCol.Add("green", "verde");
        myCol.Add("blue", "azul");

        // Displays the values in the StringDictionary.
        Console.WriteLine("Initial contents of the StringDictionary:");
        PrintKeysAndValues(myCol);

        // Deletes an element.
        myCol.Remove("green");
        Console.WriteLine("The collection contains the following elements" 
            + " after removing \"green\":");
        PrintKeysAndValues(myCol);

        // Clears the entire collection.
        myCol.Clear();
        Console.WriteLine("The collection contains the following elements" 
            + " after it is cleared:");
        PrintKeysAndValues(myCol);
    }//main

    public static void PrintKeysAndValues(StringDictionary myCol)
    {
        Console.WriteLine("   KEY        VALUE");
        IEnumerator objEnum = myCol.GetEnumerator();
        while (objEnum.MoveNext()) {
            DictionaryEntry de = (DictionaryEntry)objEnum.get_Current();
            Console.WriteLine("   {0,-10} {1}", de.get_Key(), de.get_Value());
        }
        Console.WriteLine();
    } //PrintKeysAndValues
} //SamplesStringDictionary

/*
This code produces the following output.

Initial contents of the StringDictionary:
   KEY        VALUE
   red        rojo
   blue       azul
   green      verde

The collection contains the following elements after removing "green":
   KEY        VALUE
   red        rojo
   blue       azul

The collection contains the following elements after it is cleared:
   KEY        VALUE

*/

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

Siehe auch

Referenz

StringDictionary-Klasse
StringDictionary-Member
System.Collections.Specialized-Namespace
Add

Weitere Ressourcen

Durchführen kulturunabhängiger Zeichenfolgenoperationen