如何在C#中创建ListDictionary？

要创建ListDictionary，代码如下-

示例

using System; using System.Collections; using System.Collections.Specialized; public class Demo { public static void Main(){ ListDictionary dict = new ListDictionary(); dict.Add("1", "SUV"); dict.Add("2", "Sedan"); dict.Add("3", "Utility Vehicle"); dict.Add("4", "Compact Car"); dict.Add("5", "SUV"); dict.Add("6", "Sedan"); dict.Add("7", "Utility Vehicle"); dict.Add("8", "Compact Car"); dict.Add("9", "Crossover"); dict.Add("10", "Electric Car"); Console.WriteLine("ListDictionary elements..."); foreach(DictionaryEntry d in dict){ Console.WriteLine(d.Key + " " + d.Value); } Console.WriteLine("\nIs the ListDictionary having fixed size? = "+dict.IsFixedSize); Console.WriteLine("If ListDictionary read-only? = "+dict.IsReadOnly); Console.WriteLine("Is ListDictionary synchronized = "+dict.IsSynchronized); Console.WriteLine("The ListDictionary has the key K? = "+dict.Contains("K")); Console.WriteLine("The ListDictionary has the key 9? = "+dict.Contains("9")); } }

输出结果

这将产生以下输出-

ListDictionary elements... 1 SUV 2 Sedan 3 Utility Vehicle 4 Compact Car 5 SUV 6 Sedan 7 Utility Vehicle 8 Compact Car 9 Crossover 10 Electric Car Is the ListDictionary having fixed size? = False If ListDictionary read-only? = False Is ListDictionary synchronized = False The ListDictionary has the key K? = False The ListDictionary has the key 9? = True

示例

现在让我们来看另一个示例-

using System; using System.Collections; using System.Collections.Specialized; public class Demo { public static void Main(){ ListDictionary dict1 = new ListDictionary(); dict1.Add("A", "Books"); dict1.Add("B", "Electronics"); dict1.Add("C", "Smart Wearables"); dict1.Add("D", "Pet Supplies"); dict1.Add("E", "Clothing"); dict1.Add("F", "Footwear"); Console.WriteLine("ListDictionary1 elements..."); foreach(DictionaryEntry d in dict1){ Console.WriteLine(d.Key + " " + d.Value); } ListDictionary dict2 = new ListDictionary(); dict2.Add("1", "One"); dict2.Add("2", "Two"); dict2.Add("3", "Three"); dict2.Add("4", "Four"); dict2.Add("5", "Five"); dict2.Add("6", "Six"); Console.WriteLine("\nListDictionary2 elements..."); foreach(DictionaryEntry d in dict2){ Console.WriteLine(d.Key + " " + d.Value); } Console.WriteLine("Count of key/value pairs in Dictionary 2 = "+dict2.Count); ListDictionary dict3 = new ListDictionary(); dict3 = dict2; Console.WriteLine("\nIs ListDictionary3 equal to ListDictionary2? = "+(dict3.Equals(dict2))); dict3.Clear(); Console.WriteLine("Count of key/value pairs in Dictionary 3 = "+dict3.Count); } }

输出结果

这将产生以下输出-

ListDictionary1 elements... A Books B Electronics C Smart Wearables D Pet Supplies E Clothing F Footwear ListDictionary2 elements... 1 One 2 Two 3 Three 4 Four 5 Five 6 Six Count of key/value pairs in Dictionary 2 = 6 Is ListDictionary3 equal to ListDictionary2? = True Count of key/value pairs in Dictionary 3 = 0