要在C#中创建OrderedDictionary,代码如下-
using System; using System.Collections; using System.Collections.Specialized; public class Demo { public static void Main() { OrderedDictionary dict = new OrderedDictionary(); dict.Add("A", "Books"); dict.Add("B", "Electronics"); dict.Add("C", "Smart Wearables"); dict.Add("D", "Pet Supplies"); dict.Add("E", "Clothing"); dict.Add("F", "Footwear"); Console.WriteLine("OrderedDictionary elements..."); foreach(DictionaryEntry d in dict) { Console.WriteLine(d.Key + " " + d.Value); } Console.WriteLine("Count of elements in OrderedDictionary = " + dict.Count); dict.Remove("E"); Console.WriteLine("Count of elements in OrderedDictionary (Updated)= " + dict.Count); } }
输出结果
这将产生以下输出-
OrderedDictionary elements... A Books B Electronics C Smart Wearables D Pet Supplies E Clothing F Footwear Count of elements in OrderedDictionary = 6 Count of elements in OrderedDictionary (Updated)= 5
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() { OrderedDictionary dict = new OrderedDictionary(); dict.Add("1", "One"); dict.Add("2", "Two"); dict.Add("3", "Three"); dict.Add("4", "Four"); dict.Add("5", "Five"); dict.Add("6", "Six"); dict.Add("7", "Seven"); dict.Add("8", "Eight"); ICollection col = dict.Keys; String[] strKeys = new String[dict.Count]; col.CopyTo(strKeys, 0); Console.WriteLine("Displaying the keys..."); for (int i = 0; i < dict.Count; i++) { Console.WriteLine(strKeys[i]); } } }
输出结果
这将产生以下输出-
Displaying the keys... 1 2 3 4 5 6 7 8