1 using System.Collections.Generic;//引用命名空间//Dictionary可以理解为散列集合

 2 public class DictionaryTest

 3 {

 4          public static void Main()

 5          {

 6                //1.初始化

 7                Dictionary<string, string> dicA = new Dictionary<string, string>();

 8                //2.添加元素 key，value->学号，姓名

 9                dicA.Add("A01", "张三");

10                dicA.Add("A02", "李四");

11                dicA.Add("B03", "王五");

12                dicA.Add("A03", "毛毛");

13                dicA.Add("B02", "张三");

14  

15                //3.通过key删除元素

16                dicA.Remove("A03");

17                //4.修改值

18                dicA("A02")="新值";

19                 

20                //5.假如不存在元素则加入元素

21                if (! dicA.ContainsKey("A08"))

22                    dicA.Add("A08", "哈哈");

23                 

24                //6.获取元素个数

25                int count= dicA.Count;

26  

27                //7.遍历集合

28                foreach (KeyValuePair<string, string> kvp in dicA)

29                {

30                       Console.WriteLine("学号：{0},姓名：{1}", kvp.Key, kvp.Value);

31                }

32  

33               //8.遍历键或值的集合

34               Dictionary<string, string>.KeyCollection allKeys = dicA.Keys;           

35               Console.WriteLine("最佳女主角：");

36               foreach (string oneKey in allKeys)

37               {

38                    Console.WriteLine(oneKey);

39               }

40  

41               //Dictionary.ValueCollection allValues = dicA.Values;

42               //foreach (string oneValue in allValues)

43               //{

44               //     Console.WriteLine(oneValue);

45               //}

46  

47               //9.取值

48               string stuName=dicA("A01");

49  

50               //10.清空

51               dicA.Clear();

52        }

53 }