获取或设置C#中Collection中指定索引处的元素

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]); } }

输出结果

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]); } }

输出结果

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