将元素插入C#中指定索引处的ArrayList中

要将元素插入到指定索引处的ArrayList中，代码如下-

示例

using System; using System.Collections; public class Demo { public static void Main() { ArrayList list = new ArrayList(); list.Add("One"); list.Add("Two"); list.Add("Three"); list.Add("Four"); list.Add("Five"); list.Add("Six"); list.Add("Seven"); list.Add("Eight"); Console.WriteLine("ArrayList elements..."); foreach(string str in list) { Console.WriteLine(str); } Console.WriteLine("ArrayList is read-only? = "+list.IsReadOnly); Console.WriteLine("Does the element Six in the ArrayList? = "+list.Contains("Six")); list.Insert(4, "Twelve"); Console.WriteLine("ArrayList elements...UPDATED"); foreach(string str in list) { Console.WriteLine(str); } } }

输出结果

这将产生以下输出-

ArrayList elements... One Two Three Four Five Six Seven Eight ArrayList is read-only? = False Does the element Six in the ArrayList? = True ArrayList elements...UPDATED One Two Three Four Twelve Five Six Seven Eight

示例

让我们看另一个例子-

using System; using System.Collections; public class Demo { public static void Main() { ArrayList arrList = new ArrayList(); arrList.Add(100); arrList.Add(200); arrList.Add(300); arrList.Add(400); arrList.Add(500); Console.WriteLine("Display elements..."); IEnumerator demoEnum = arrList.GetEnumerator(); while (demoEnum.MoveNext()) { Object ob = demoEnum.Current; Console.WriteLine(ob); } arrList.Insert(4, 1000); Console.WriteLine("Display elements...UPDATED"); demoEnum = arrList.GetEnumerator(); while (demoEnum.MoveNext()) { Object ob = demoEnum.Current; Console.WriteLine(ob); } } }

输出结果

这将产生以下输出-

Display elements... 100 200 300 400 500 Display elements...UPDATED 100 200 300 400 1000 500