Dictionary<TKey,TValue>.IDictionary.Remove(Object) Methode

Definition

Namespace:

System.Collections.Generic

Assembly:

System.Collections.dll

Quelle:

Dictionary.cs

Entfernt das Element mit dem angegebenen Schlüssel aus dem IDictionary.

 virtual void System.Collections.IDictionary.Remove(System::Object ^ key) = System::Collections::IDictionary::Remove;

void IDictionary.Remove (object key);

abstract member System.Collections.IDictionary.Remove : obj -> unit
override this.System.Collections.IDictionary.Remove : obj -> unit

Sub Remove (key As Object) Implements IDictionary.Remove

Parameter

key

Object

Der Schlüssel des zu entfernenden Elements.

Implementiert

Remove(Object)

Ausnahmen

ArgumentNullException

key ist null.

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie die der IDictionary.RemoveSystem.Collections.IDictionary -Schnittstelle mit einem Dictionary<TKey,TValue>verwendet wird.

Das Codebeispiel ist Teil eines größeren Beispiels, einschließlich der Ausgabe, das für die IDictionary.Add -Methode bereitgestellt wird.

using System;
using System.Collections;
using System.Collections.Generic;

public class Example
{
    public static void Main()
    {
        // Create a new dictionary of strings, with string keys,
        // and access it using the IDictionary interface.
        //
        IDictionary openWith = new Dictionary<string, string>();

        // Add some elements to the dictionary. There are no
        // duplicate keys, but some of the values are duplicates.
        // IDictionary.Add throws an exception if incorrect types
        // are supplied for key or value.
        openWith.Add("txt", "notepad.exe");
        openWith.Add("bmp", "paint.exe");
        openWith.Add("dib", "paint.exe");
        openWith.Add("rtf", "wordpad.exe");

Imports System.Collections
Imports System.Collections.Generic

Public Class Example
    
    Public Shared Sub Main() 

        ' Create a new dictionary of strings, with string keys,
        ' and access it using the IDictionary interface.
        '
        Dim openWith As IDictionary = _
            New Dictionary(Of String, String)
        
        ' Add some elements to the dictionary. There are no 
        ' duplicate keys, but some of the values are duplicates.
        ' IDictionary.Add throws an exception if incorrect types
        ' are supplied for key or value.
        openWith.Add("txt", "notepad.exe")
        openWith.Add("bmp", "paint.exe")
        openWith.Add("dib", "paint.exe")
        openWith.Add("rtf", "wordpad.exe")

// Use the Remove method to remove a key/value pair. No
// exception is thrown if the wrong data type is supplied.
Console.WriteLine("\nRemove(\"dib\")");
openWith.Remove("dib");

if (!openWith.Contains("dib"))
{
    Console.WriteLine("Key \"dib\" is not found.");
}

' Use the Remove method to remove a key/value pair. No
' exception is thrown if the wrong data type is supplied.
Console.WriteLine(vbLf + "Remove(""dib"")")
openWith.Remove("dib")

If Not openWith.Contains("dib") Then
    Console.WriteLine("Key ""dib"" is not found.")
End If

    }
}

    End Sub

End Class

Hinweise

Diese Methode nähert sich einem O(1)-Vorgang.