C # Dictionary ultimate method of use http://www.yongfa365.com/Item/Dictionary.html)

1. Using System;
2. Using System. Collections. Generic;
4. Class DictionaryDemo
5. {
6. Static void Main (string [] args)
7. {
8. DictionaryDemo001 ();
9. Console. ReadLine ();
11. DictionaryDemo002 ();
12. Console. ReadLine ();
14. DictionaryDemo003 ();
15. Console. ReadLine ();
16. }
18. /// <Summary>
19. /// General Usage
20. /// </Summary>
21. Static void DictionaryDemo001 ()
22. {
23. Dictionary <int, string> dict = new Dictionary <int, string> ();
24. Dict. Add (1, "111 ");
25. Dict. Add (2, "222 ");
27. // Determine whether the corresponding key exists and display it
28. If (dict. ContainsKey (2 ))
29. {
30. Console. WriteLine (dict [2]);
31. }
33. // Traverse Keys
34. Foreach (var item in dict. Keys)
35. {
36. Console. WriteLine ("Key: {0}", item );
37. }
39. // Traverse Values
40. Foreach (var item in dict. Values)
41. {
42. Console. WriteLine ("value: {0}", item );
43. }
45. // Traverse the entire dictionary
46. Foreach (var item in dict)
47. {
48. Console. WriteLine ("key: {0} value: {1}", item. Key, item. Value );
49. }
50. }
52. /// <Summary>
53. /// The parameter is of another type
54. /// </Summary>
55. Static void DictionaryDemo002 ()
56. {
57. Dictionary <string, string []> dict = new Dictionary <string, string []> ();
58. Dict. Add ("1", "1, 11, 111". Split (','));
59. Dict. Add ("2", "2,22, 222". Split (','));
60. Console. WriteLine (dict ["2"] [2]);
61. }
63. /// <Summary>
64. /// Call a custom class
65. /// </Summary>
66. Static void DictionaryDemo003 ()
67. {
68. Dictionary <int, yongfa365> dict = new Dictionary <int, yongfa365> ();
69. For (int I = 0; I <10; I ++)
70. {
71. Yongfa365 y = new yongfa365 ();
72. Y. UserCode = I;
73. Y. UserName = "www.yongfa365.com" + I. ToString ();
74. Dict. Add (I, y );
75. }
76. Foreach (var item in dict)
77. {
78. Console. WriteLine ("{0} One: {1} UserName: {2}", item. Key, item. Value. UserCode, item. Value. UserName );
79. }
80. }
81. }
83. Class yongfa365
84. {
85. Public int UserCode {get; set ;}
86. Public string UserName {get; set ;}
88. }