要检查StringDictionary是否包含特定值,代码如下-
using System; using System.Collections; using System.Collections.Specialized; public class Demo { public static void Main(){ StringDictionary strDict1 = new StringDictionary(); strDict1.Add("A", "John"); strDict1.Add("B", "Andy"); strDict1.Add("C", "Tim"); strDict1.Add("D", "Ryan"); strDict1.Add("E", "Kevin"); strDict1.Add("F", "Katie"); strDict1.Add("G", "Brad"); Console.WriteLine("StringDictionary1 elements..."); foreach(DictionaryEntry d in strDict1){ Console.WriteLine(d.Key + " " + d.Value); } Console.WriteLine("Does StringDictionary1 has key G? "+strDict1.ContainsKey("G")); Console.WriteLine("Does StringDictionary1 has value Ryan? "+strDict1.ContainsValue("Ryan")); StringDictionary strDict2 = new StringDictionary(); strDict2.Add("A", "John"); strDict2.Add("B", "Andy"); strDict2.Add("C", "Tim"); strDict2.Add("D", "Ryan"); strDict2.Add("E", "Kevin"); strDict2.Add("F", "Katie"); strDict2.Add("G", "Brad"); Console.WriteLine("\nStringDictionary2 elements..."); foreach(DictionaryEntry d in strDict2){ Console.WriteLine(d.Key + " " + d.Value); } Console.WriteLine("\nIs Dictionary2 equal to Dictionary1? = "+strDict2.Equals(strDict1)); Console.WriteLine("Does StringDictionary2 has key B? "+strDict2.ContainsKey("B")); } }
输出结果
这将产生以下输出-
StringDictionary1 elements... a John b Andy c Tim d Ryan e Kevin f Katie g Brad Does StringDictionary1 has key G? True Does StringDictionary1 has value Ryan? True StringDictionary2 elements... a John b Andy c Tim d Ryan e Kevin f Katie g Brad Is Dictionary2 equal to Dictionary1? = False Does StringDictionary2 has key B? True
让我们看另一个例子-
using System; using System.Collections; using System.Collections.Specialized; public class Demo { public static void Main(){ StringDictionary strDict1 = new StringDictionary(); strDict1.Add("U", "Electronics"); strDict1.Add("V", "Toys"); strDict1.Add("W", "Books"); strDict1.Add("X", "Accessories"); Console.WriteLine("StringDictionary1 elements..."); foreach(DictionaryEntry d in strDict1){ Console.WriteLine(d.Key + " " + d.Value); } Console.WriteLine("Does StringDictionary1 has key G? "+strDict1.ContainsKey("G")); Console.WriteLine("Does StringDictionary1 has value Footwear? "+strDict1.ContainsValue("Footwear")); StringDictionary strDict2 = new StringDictionary(); strDict2.Add("A", "John"); strDict2.Add("B", "Andy"); strDict2.Add("C", "Tim"); strDict2.Add("D", "Ryan"); strDict2.Add("E", "Kevin"); strDict2.Add("F", "Katie"); strDict2.Add("G", "Brad"); Console.WriteLine("\nStringDictionary2 elements..."); foreach(DictionaryEntry d in strDict2){ Console.WriteLine(d.Key + " " + d.Value); } Console.WriteLine("\nIs Dictionary2 equal to Dictionary1? = "+strDict2.Equals(strDict1)); Console.WriteLine("Does StringDictionary2 has key B? "+strDict2.ContainsKey("B")); } }
输出结果
这将产生以下输出-
StringDictionary1 elements... x Accessories u Electronics v Toys w Books Does StringDictionary1 has key G? False Does StringDictionary1 has value Footwear? False StringDictionary2 elements... a John b Andy c Tim d Ryan e Kevin f Katie g Brad Is Dictionary2 equal to Dictionary1? = False Does StringDictionary2 has key B? True