在 C# 中从 ArrayList 中删除指定对象的第一次出现
csharpserver side programmingprogramming更新于 2025/8/31 11:07:17
要从 ArrayList 中删除指定对象的第一次出现，代码如下 −
示例
using System;
using System.Collections;
public class Demo {
public static void Main(String[] args) {
ArrayList list1 = new ArrayList();
list1.Add("A");
list1.Add("B");
list1.Add("C");
list1.Add("D");
list1.Add("E");
list1.Add("F");
list1.Add("G");
list1.Add("H");
list1.Add("I");
Console.WriteLine("Elements in ArrayList1...");
foreach (string res in list1) {
Console.WriteLine(res);
}
ArrayList list2 = new ArrayList();
list2.Add("A");
list2.Add("B");
list2.Add("C");
list2.Add("D");
list2.Add("E");
list2.Add("F");
list2.Add("G");
list2.Add("H");
list2.Add("I");
list2.Add("G");
list2.Add("I");
Console.WriteLine("Elements in ArrayList2...");
foreach (string res in list2) {
Console.WriteLine(res);
}
Console.WriteLine("Count of elements in ArrayList2 = " + list2.Count);
list2.Remove("G");
Console.WriteLine("Elements in ArrayList2... (UPDATED)");
foreach (string res in list2) {
Console.WriteLine(res);
}
Console.WriteLine("Count of elements in ArrayList2 (Updated) = " + list2.Count);
}
}
输出
这将产生以下输出 −
Elements in ArrayList1... A B C D E F G H I Elements in ArrayList2... A B C D E F G H I G I Count of elements in ArrayList2 = 11 Elements in ArrayList2... (UPDATED) A B C D E F H I G I Count of elements in ArrayList2 (Updated) = 10
示例
让我们看另一个例子 −
using System;
using System.Collections;
public class Demo {
public static void Main(String[] args) {
ArrayList list = new ArrayList();
list.Add("Laptop");
list.Add("Dektop");
list.Add("Wearables");
list.Add("Tablet");
list.Add("Notebook");
list.Add("Ultrabooks");
Console.WriteLine("Elements in ArrayList...");
foreach (string res in list) {
Console.WriteLine(res);
}
Console.WriteLine("Count of elements in ArrayList = " + list.Count);
list.Remove("Tablet");
Console.WriteLine("Elements in ArrayList... (UPDATED)");
foreach (string res in list) {
Console.WriteLine(res);
}
Console.WriteLine("Count of elements in ArrayList (Updated) = " + list.Count);
}
}
输出
这将产生以下输出 −
Elements in ArrayList... Laptop Dektop Wearables Tablet Notebook Ultrabooks Count of elements in ArrayList = 6 Elements in ArrayList... (UPDATED) Laptop Dektop Wearables Notebook Ultrabooks Count of elements in ArrayList (Updated) = 5
