类索引器
1 using System;
2 using System.Collections.Generic;
3
4 namespace Prototype
5 {
6 class Program
7 {
8 static void Main(string[] args)
9 {
10 PersonContainer pc = new PersonContainer();
11 pc[1] = new Person() { No = 1, Age = 30, Name = "杨俊明" };
12 pc[2] = new Person() { No = 2, Age = 30, Name = "Mike" };
13
14 Console.WriteLine(pc[1] + "\n" + pc[2] + "\n" + pc[3]);
15
16 Console.WriteLine(pc["杨俊明"] + "\n" + pc["MIKE"] + "\n" + pc["NotExists"]);
17
18 Console.Read();
19
20 }
21 }
22
23
24 public class Person
25 {
26 public int No { set; get; }
27 public string Name { set; get; }
28 public int Age { set; get; }
29
30 public override string ToString()
31 {
32 return string.Format("No：{0}，Name：{1}，Age：{2}", No, Name, Age);
33 }
34 }
35
36 public class PersonContainer
37 {
38 Dictionary<int, Person> dics = new Dictionary<int, Person>();
39
40 /// <summary>
41 /// 类索引器
42 /// </summary>
43 /// <param name="no"></param>
44 /// <returns></returns>
45 public Person this[int no]
46 {
47 get
48 {
49 if (dics.ContainsKey(no))
50 {
51 return dics[no];
52 }
53 else
54 {
55 return null;
56 }
57 }
58 set
59 {
60 if (!dics.ContainsKey(no))
61 {
62 dics.Add(no, value);
63 }
64 else
65 {
66 dics[no] = value;
67 }
68 }
69 }
70
71 /// <summary>
72 /// 类索引器重载
73 /// </summary>
74 /// <param name="name"></param>
75 /// <returns></returns>
76 public Person this[string name]
77 {
78 //只读
79 get
80 {
81 Person _person = null;
82 foreach (Person _p in dics.Values)
83 {
84 if (string.Compare(_p.Name, name, true) == 0)
85 {
86 _person = _p;
87 break;
88 }
89 }
90
91 return _person;
92 }
93 }
94 }
95 }
96