中文隨機數

 

[c#]代碼庫

1          /// <summary>

2         /// 隨機中文碼

3         /// </summary>

4         /// <returns></returns>

5         private string GetRndCh()

6         {

7             System.Text.Encoding gb = System.Text.Encoding.Default;//獲取GB2312編碼頁（表）

8             object[] bytes = CreateRegionCode(4);//調用函數產生4個隨機中文漢字編碼

9             string[] str = new string[4];

10             System.Text.StringBuilder sb = new System.Text.StringBuilder();

11             for (int i = 0; i < 4; i++)

12             {

13                 //根據漢字編碼的字節數組解碼出中文漢字

14                 str[i] = gb.GetString((byte[])Convert.ChangeType(bytes[i], typeof(byte[])));

15                 sb.Append( str[i].ToString());

16             }

17             return sb.ToString ();

18         }

19

20

21         /// <summary>

22         /// 產生隨機中文漢字編碼

23         /// </summary>

24         /// <param name="strlength"></param>

25         /// <returns></returns>

26         private static object[] CreateRegionCode(int strlength)

27         {

28             //定義一個字符串數組儲存漢字編碼的組成元素

29             string[] rBase = new String[16] { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };

30             Random rnd = new Random();

31             object[] bytes = new object[strlength];

32

33             for (int i = 0; i < strlength; i++)

34             {

35                 //區位碼第1位

36                 int r1 = rnd.Next(11, 14);

37                 string str_r1 = rBase[r1].Trim();

38

39                 //區位碼第2位

40                 rnd = new Random(r1 * unchecked((int)DateTime.Now.Ticks) + i);

41                 int r2;

42                 if (r1 == 13)

43                 {

44                     r2 = rnd.Next(0, 7);

45                 }

46                 else

47                 {

48                     r2 = rnd.Next(0, 16);

49                 }

50                 string str_r2 = rBase[r2].Trim();

51

52                 //區位碼第3位

53                 rnd = new Random(r2 * unchecked((int)DateTime.Now.Ticks) + i);//更換隨機種子

54                 int r3 = rnd.Next(10, 16);

55                 string str_r3 = rBase[r3].Trim();

56

57                 //區位碼第4位

58                 rnd = new Random(r3 * unchecked((int)DateTime.Now.Ticks) + i);

59                 int r4;

60                 if (r3 == 10)

61                 {

62                     r4 = rnd.Next(1, 16);

63                 }

64                 else if (r3 == 15)

65                 {

66                     r4 = rnd.Next(0, 15);

67                 }

68                 else

69                 {

70                     r4 = rnd.Next(0, 16);

71                 }

72                 string str_r4 = rBase[r4].Trim();

73

74                 //定義兩個字節變量存儲產生的隨機漢字區位碼

75                 byte byte1 = Convert.ToByte(str_r1 + str_r2, 16);

76                 byte byte2 = Convert.ToByte(str_r3 + str_r4, 16);

77

78                 //將兩個字節變量存儲在字節數組中

79                 byte[] str_r = new byte[] { byte1, byte2 };

80

81                 //將產生的一個漢字的字節數組放入object數組中

82                 bytes.SetValue(str_r, i);

83             }

84             return bytes;

85         }