要检查元素是否在Collection中,代码如下-
using System; using System.Collections.ObjectModel; public class Demo { public static void Main(){ Collection<int> col = new Collection<int>(); col.Add(10); col.Add(20); col.Add(30); col.Add(40); col.Add(50); col.Add(60); col.Add(70); col.Add(80); Console.WriteLine("Elements in the Collection..."); foreach(int val in col){ Console.WriteLine(val); } Console.WriteLine("Does the collection has the element 70? = "+col.Contains(70)); } }
输出结果
这将产生以下输出-
Elements in the Collection... 10 20 30 40 50 60 70 80 Does the collection has the element 70? = True
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("John"); col.Add("Gary"); col.Add("Tom"); col.Add("Brad"); col.Add("Katie"); col.Add("Andy"); col.Add("Nathan"); Console.WriteLine("Elements in the Collection..."); foreach(string val in col){ Console.WriteLine(val); } Console.WriteLine("Does the collection has the value Bradley? = "+col.Contains("Bradley")); } }
输出结果
这将产生以下输出-
Elements in the Collection... John Gary Tom Brad Katie Andy Nathan Does the collection has the value Bradley? = False