SortedDictionary<TKey,TValue>.IDictionary.Remove(Object) 方法
定义
重要
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从 IDictionary 中移除包含指定键的元素。
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 -> unitSub Remove (key As Object) Implements IDictionary.Remove参数
- key
- Object
要移除的元素的键。
实现
例外
key 为 null。
示例
下面的代码示例演示如何将 IDictionary.Remove 接口的 System.Collections.IDictionary 用于 SortedDictionary<TKey,TValue>。
该代码示例是为 方法提供的更大示例（包括输出）的一 IDictionary.Add 部分。
using System;
using System.Collections;
using System.Collections.Generic;
public class Example
{
public static void Main()
{
// Create a new sorted dictionary of strings, with string keys,
// and access it using the IDictionary interface.
//
IDictionary openWith = new SortedDictionary<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 sorted dictionary of strings, with string keys,
' and access it using the IDictionary interface.
'
Dim openWith As IDictionary = _
New SortedDictionary(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
注解
此方法是 O (日志 n) 操作。
