在 C# 中获取或设置 Collection 中指定索引处的元素
csharpserver side programmingprogramming更新于 2025/5/18 19:37:17
要获取或设置 Collection 中指定索引处的元素，代码如下 −
示例
using System;
using System.Collections.ObjectModel;
public class Demo {
public static void Main() {
Collection<string> col = new Collection<string>();
col.Add("Laptop");
col.Add("Desktop");
col.Add("Notebook");
col.Add("Ultrabook");
col.Add("Tablet");
col.Add("Headphone");
col.Add("Speaker");
Console.WriteLine("Elements in Collection...");
foreach(string str in col) {
Console.WriteLine(str);
}
Console.WriteLine("Element at index 3 = " + col[3]);
Console.WriteLine("Element at index 4 = " + col[4]);
}
}
输出
这将产生以下输出 −
Elements in Collection... Laptop Desktop Notebook Ultrabook Tablet Headphone Speaker Element at index 3 = Ultrabook Element at index 4 = Tablet
示例
让我们看另一个例子 −
using System;
using System.Collections.ObjectModel;
public class Demo {
public static void Main() {
Collection<string> col = new Collection<string>();
col.Add("Laptop");
col.Add("Desktop");
col.Add("Notebook");
col.Add("Ultrabook");
col.Add("Tablet");
col.Add("Headphone");
col.Add("Speaker");
Console.WriteLine("Elements in Collection...");
foreach(string str in col) {
Console.WriteLine(str);
}
Console.WriteLine("Element at index 3 = " + col[3]);
col[3] = "SSD";
Console.WriteLine("Element at index 3 (Updated) = " + col[3]);
}
}
输出
这将产生以下输出 −
Elements in Collection... Laptop Desktop Notebook Ultrabook Tablet Headphone Speaker Element at index 3 = Ultrabook Element at index 3 (Updated) = SSD
