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SortedList.Remove-Methode

Entfernt das Element mit dem angegebenen Schlüssel aus SortedList.

Namespace: System.Collections
Assembly: mscorlib (in mscorlib.dll)

Syntax

'Declaration
Public Overridable Sub Remove ( _
    key As Object _
)
'Usage
Dim instance As SortedList
Dim key As Object

instance.Remove(key)

public virtual void Remove (
    Object key
)

public:
virtual void Remove (
    Object^ key
)

public void Remove (
    Object key
)

public function Remove (
    key : Object
)

Parameter

  • key
    Der Schlüssel des zu entfernenden Elements.

Ausnahmen

Ausnahmetyp Bedingung

ArgumentNullException

key ist NULL (Nothing in Visual Basic).

NotSupportedException

SortedList ist schreibgeschützt.

– oder –

SortedList hat eine feste Größe.

Hinweise

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

In Auflistungen mit zusammenhängenden Elementen, z. B. Listen, wird die entstandene Lücke durch Verschieben aller nachfolgenden Elemente gefüllt. Wenn die Auflistung indiziert ist, werden auch die Indizes der verschobenen Elemente aktualisiert. Dies gilt nicht für Auflistungen, in denen die Elemente konzeptionell in Buckets gruppiert sind, z. B. Hashtabellen.

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

Beispiel

Im folgenden Beispiel wird gezeigt, wie Elemente aus SortedList entfernt werden.

Imports System
Imports System.Collections
Imports Microsoft.VisualBasic

Public Class SamplesSortedList    
    
    Public Shared Sub Main()
        
        ' Creates and initializes a new SortedList.
        Dim mySL As New SortedList()
        mySL.Add("3c", "dog")
        mySL.Add("2c", "over")
        mySL.Add("1c", "brown")
        mySL.Add("1a", "The")
        mySL.Add("1b", "quick")
        mySL.Add("3a", "the")
        mySL.Add("3b", "lazy")
        mySL.Add("2a", "fox")
        mySL.Add("2b", "jumped")
        
        ' Displays the SortedList.
        Console.WriteLine("The SortedList initially contains the following:")
        PrintKeysAndValues(mySL)
        
        ' Removes the element with the key "3b".
        mySL.Remove("3b")
        
        ' Displays the current state of the SortedList.
        Console.WriteLine("After removing ""lazy"":")
        PrintKeysAndValues(mySL)
        
        ' Removes the element at index 5.
        mySL.RemoveAt(5)
        
        ' Displays the current state of the SortedList.
        Console.WriteLine("After removing the element at index 5:")
        PrintKeysAndValues(mySL)
    End Sub
    
    
    Public Shared Sub PrintKeysAndValues(myList As SortedList)
        Console.WriteLine(ControlChars.Tab & "-KEY-" & ControlChars.Tab & _
           "-VALUE-")
        Dim i As Integer
        For i = 0 To myList.Count - 1
            Console.WriteLine(ControlChars.Tab & "{0}:" & ControlChars.Tab & _
               "{1}", myList.GetKey(i), myList.GetByIndex(i))
        Next i
        Console.WriteLine()
    End Sub
End Class

' This code produces the following output.
' 
' The SortedList initially contains the following:
'     -KEY-    -VALUE-
'     1a:    The
'     1b:    quick
'     1c:    brown
'     2a:    fox
'     2b:    jumped
'     2c:    over
'     3a:    the
'     3b:    lazy
'     3c:    dog
' 
' After removing "lazy":
'     -KEY-    -VALUE-
'     1a:    The
'     1b:    quick
'     1c:    brown
'     2a:    fox
'     2b:    jumped
'     2c:    over
'     3a:    the
'     3c:    dog
' 
' After removing the element at index 5:
'     -KEY-    -VALUE-
'     1a:    The
'     1b:    quick
'     1c:    brown
'     2a:    fox
'     2b:    jumped
'     3a:    the
'     3c:    dog 

using System;
using System.Collections;
public class SamplesSortedList  {

   public static void Main()  {

      // Creates and initializes a new SortedList.
      SortedList mySL = new SortedList();
      mySL.Add( "3c", "dog" );
      mySL.Add( "2c", "over" );
      mySL.Add( "1c", "brown" );
      mySL.Add( "1a", "The" );
      mySL.Add( "1b", "quick" );
      mySL.Add( "3a", "the" );
      mySL.Add( "3b", "lazy" );
      mySL.Add( "2a", "fox" );
      mySL.Add( "2b", "jumped" );

      // Displays the SortedList.
      Console.WriteLine( "The SortedList initially contains the following:" );
      PrintKeysAndValues( mySL );

      // Removes the element with the key "3b".
      mySL.Remove( "3b" );

      // Displays the current state of the SortedList.
      Console.WriteLine( "After removing \"lazy\":" );
      PrintKeysAndValues( mySL );

      // Removes the element at index 5.
      mySL.RemoveAt( 5 );

      // Displays the current state of the SortedList.
      Console.WriteLine( "After removing the element at index 5:" );
      PrintKeysAndValues( mySL );
   }


   public static void PrintKeysAndValues( SortedList myList )  {
      Console.WriteLine( "\t-KEY-\t-VALUE-" );
      for ( int i = 0; i < myList.Count; i++ )  {
         Console.WriteLine( "\t{0}:\t{1}", myList.GetKey(i), myList.GetByIndex(i) );
      }
      Console.WriteLine();
   }
}
/* 
This code produces the following output.

The SortedList initially contains the following:
    -KEY-    -VALUE-
    1a:    The
    1b:    quick
    1c:    brown
    2a:    fox
    2b:    jumped
    2c:    over
    3a:    the
    3b:    lazy
    3c:    dog

After removing "lazy":
    -KEY-    -VALUE-
    1a:    The
    1b:    quick
    1c:    brown
    2a:    fox
    2b:    jumped
    2c:    over
    3a:    the
    3c:    dog

After removing the element at index 5:
    -KEY-    -VALUE-
    1a:    The
    1b:    quick
    1c:    brown
    2a:    fox
    2b:    jumped
    3a:    the
    3c:    dog
*/

#using <system.dll>

using namespace System;
using namespace System::Collections;
void PrintKeysAndValues( SortedList^ myList )
{
   Console::WriteLine( "\t-KEY-\t-VALUE-" );
   for ( int i = 0; i < myList->Count; i++ )
   {
      Console::WriteLine( "\t{0}:\t{1}", myList->GetKey( i ), myList->GetByIndex( i ) );

   }
   Console::WriteLine();
}

int main()
{
   
   // Creates and initializes a new SortedList.
   SortedList^ mySL = gcnew SortedList;
   mySL->Add( "3c", "dog" );
   mySL->Add( "2c", "over" );
   mySL->Add( "1c", "brown" );
   mySL->Add( "1a", "The" );
   mySL->Add( "1b", "quick" );
   mySL->Add( "3a", "the" );
   mySL->Add( "3b", "lazy" );
   mySL->Add( "2a", "fox" );
   mySL->Add( "2b", "jumped" );
   
   // Displays the SortedList.
   Console::WriteLine( "The SortedList initially contains the following:" );
   PrintKeysAndValues( mySL );
   
   // Removes the element with the key "3b".
   mySL->Remove( "3b" );
   
   // Displays the current state of the SortedList.
   Console::WriteLine( "After removing \"lazy\":" );
   PrintKeysAndValues( mySL );
   
   // Removes the element at index 5.
   mySL->RemoveAt( 5 );
   
   // Displays the current state of the SortedList.
   Console::WriteLine( "After removing the element at index 5:" );
   PrintKeysAndValues( mySL );
}

/*
This code produces the following output.

The SortedList initially contains the following:
        -KEY-   -VALUE-
        1a:     The
        1b:     quick
        1c:     brown
        2a:     fox
        2b:     jumped
        2c:     over
        3a:     the
        3b:     lazy
        3c:     dog

After removing "lazy":
        -KEY-   -VALUE-
        1a:     The
        1b:     quick
        1c:     brown
        2a:     fox
        2b:     jumped
        2c:     over
        3a:     the
        3c:     dog

After removing the element at index 5:
        -KEY-   -VALUE-
        1a:     The
        1b:     quick
        1c:     brown
        2a:     fox
        2b:     jumped
        3a:     the
        3c:     dog
*/

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

public class SamplesSortedList
{
    public static void main(String[] args)
    {
        // Creates and initializes a new SortedList.
        SortedList mySL = new SortedList();

        mySL.Add("3c", "dog");
        mySL.Add("2c", "over");
        mySL.Add("1c", "brown");
        mySL.Add("1a", "The");
        mySL.Add("1b", "quick");
        mySL.Add("3a", "the");
        mySL.Add("3b", "lazy");
        mySL.Add("2a", "fox");
        mySL.Add("2b", "jumped");

        // Displays the SortedList.
        Console.WriteLine("The SortedList initially contains the following:");
        PrintKeysAndValues(mySL);

        // Removes the element with the key "3b".
        mySL.Remove("3b");

        // Displays the current state of the SortedList.
        Console.WriteLine("After removing \"lazy\":");
        PrintKeysAndValues(mySL);

        // Removes the element at index 5.
        mySL.RemoveAt(5);

        // Displays the current state of the SortedList.
        Console.WriteLine("After removing the element at index 5:");
        PrintKeysAndValues(mySL);
    } //main

    public static void PrintKeysAndValues(SortedList myList)
    {
        Console.WriteLine("\t-KEY-\t-VALUE-");
        for (int i = 0; i < myList.get_Count(); i++) {
            Console.WriteLine("\t{0}:\t{1}", myList.GetKey(i), 
                myList.GetByIndex(i));
        }
        Console.WriteLine();
    } //PrintKeysAndValues

} //SamplesSortedList
/* 
 This code produces the following output.
 
 The SortedList initially contains the following:
        -KEY-   -VALUE-
        1a:     The
        1b:     quick
        1c:     brown
        2a:     fox
        2b:     jumped
        2c:     over
        3a:     the
        3b:     lazy
        3c:     dog

 After removing "lazy":
        -KEY-   -VALUE-
        1a:     The
        1b:     quick
        1c:     brown
        2a:     fox
        2b:     jumped
        2c:     over
        3a:     the
        3c:     dog

 After removing the element at index 5:
        -KEY-   -VALUE-
        1a:     The
        1b:     quick
        1c:     brown
        2a:     fox
        2b:     jumped
        3a:     the
        3c:     dog
 */

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

SortedList-Klasse
SortedList-Member
System.Collections-Namespace
RemoveAt

Weitere Ressourcen

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