要检查ArrayList中是否包含元素,代码如下-
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")); } }
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
现在让我们来看另一个示例-
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 in a range..."); IEnumerator demoEnum = arrList.GetEnumerator(1, 3); while (demoEnum.MoveNext()) { Object ob = demoEnum.Current; Console.WriteLine(ob); } Console.WriteLine("Does the element 1000 in the ArrayList? = "+arrList.Contains(1000)); } }
输出结果
这将产生以下输出-
Display elements in a range... 200 300 400 Does the element 1000 in the ArrayList? = False