要将元素添加到哈希表中,代码如下-
using System; using System.Collections; public class Demo { public static void Main(){ Hashtable hash = new Hashtable(10); hash.Add("1", "A"); hash.Add("2", "B"); hash.Add("3", "C"); hash.Add("4", "D"); hash.Add("5","E"); hash.Add("6", "F"); hash.Add("7", "G"); hash.Add("8","H"); hash.Add("9", "I"); hash.Add("10", "J"); Console.WriteLine("Hashtable Key and Value pairs..."); foreach(DictionaryEntry entry in hash){ Console.WriteLine("{0} and {1} ", entry.Key, entry.Value); } Console.WriteLine("Count of entries in Hashtable = "+ hash.Count); hash.Add("11", "K"); Console.WriteLine("Hashtable Key and Value pairs...UPDATED"); foreach(DictionaryEntry entry in hash){ Console.WriteLine("{0} and {1} ", entry.Key, entry.Value); } Console.WriteLine("Count of entries in Hashtable (updated) = "+hash.Count); } }
输出结果
这将产生以下输出-
Hashtable Key and Value pairs... 10 and J 1 and A 2 and B 3 and C 4 and D 5 and E 6 and F 7 and G 8 and H 9 and I Count of entries in Hashtable = 10 Hashtable Key and Value pairs...UPDATED 10 and J 1 and A 2 and B 3 and C 4 and D 5 and E 6 and F 7 and G 8 and H 9 and I 11 and K Count of entries in Hashtable (updated) = 11
现在让我们来看另一个示例-
using System; using System.Collections; public class Demo { public static void Main(){ Hashtable hash = new Hashtable(10); hash.Add("1", "SUV"); hash.Add("2", "Electric Cars"); hash.Add("3", "AUV"); hash.Add("4", "Utility Vehicle"); hash.Add("5","Compact Car"); hash.Add("6", "Sedan"); hash.Add("7","Crossover"); Console.WriteLine("Enumerator to iterate through the Hashtable..."); IDictionaryEnumerator demoEnum = hash.GetEnumerator(); while (demoEnum.MoveNext()) Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value); } }
输出结果
这将产生以下输出-
Enumerator to iterate through the Hashtable... Key = 1, Value = SUV Key = 2, Value = Electric Cars Key = 3, Value = AUV Key = 4, Value = Utility Vehicle Key = 5, Value = Compact Car Key = 6, Value = Sedan Key = 7, Value = Crossover