数据结构
网络
RDBMS
操作系统
Java
MS Excel
iOS
HTML
CSS
Android
Python
C 编程
C++
C#
MongoDB
MySQL
Javascript
PHP
物理学
化学
生物学
数学
英语
经济学
心理学
社会学
时装学
法律学从 C# 中的 Hashtable 中移除具有特定键的元素
要从 Hashtable 中删除具有指定键的元素，代码如下 -
示例
using System;
using System.Collections;
public class Demo {
public static void Main(){
Hashtable hash = new Hashtable(10);
hash.Add("1", "A");
hash.Add("2", "B");
hash.Add("3", "C");
hash.Add("4", "D");
hash.Add("5","E");
hash.Add("6", "F");
hash.Add("7", "G");
hash.Add("8","H");
hash.Add("9", "I");
hash.Add("10", "J");
Console.WriteLine("Hashtable Key and Value pairs...");
foreach(DictionaryEntry entry in hash){
Console.WriteLine("{0} and {1} ", entry.Key, entry.Value);
}
Console.WriteLine("Is the Hashtable having fixed size? = "+hash.IsFixedSize);
Console.WriteLine("Count of entries in Hashtable = "+ hash.Count);
hash.Remove("5");
Console.WriteLine("Count of entries in Hashtable (updated) = "+hash.Count);
}
}输出
将产生以下输出 -
Hashtable Key and Value pairs... 10 and J 1 and A 2 and B 3 and C 4 and D 5 and E 6 and F 7 and G 8 and H 9 and I Is the Hashtable having fixed size? = False Count of entries in Hashtable = 10 Count of entries in Hashtable (updated) = 9
示例
让我们看另一个示例 -
using System;
using System.Collections;
public class Demo {
public static void Main(){
Hashtable hash = new Hashtable(10);
hash.Add("One", "Marketing");
hash.Add("Two", "Operations");
hash.Add("Three", "Finance");
hash.Add("Four", "IT");
hash.Add("Five","Sales");
hash.Add("Six", "Purchase");
Console.WriteLine("Hashtable Key and Value pairs...");
foreach(DictionaryEntry entry in hash){
Console.WriteLine("{0} and {1} ", entry.Key, entry.Value);
}
Console.WriteLine("Count of entries in Hashtable = "+ hash.Count);
hash.Remove("Two");
hash.Remove("Three");
hash.Remove("Four");
Console.WriteLine("Count of entries in Hashtable (updated) = "+hash.Count);
}
}输出
将产生以下输出 -
Hashtable Key and Value pairs... One and Marketing Five and Sales Three and Finance Two and Operations Four and IT Six and Purchase Count of entries in Hashtable = 6 Count of entries in Hashtable (updated) = 3
更新于： 06-12-2019
91 查看数
广告