生成随机数[码]帮助类

2010-07-21 15:09 stubman 阅读(371) 评论(0) 编辑收藏举报

贴一段以前工作中编写的生成随机数【码】帮助类，当时是用这个类生成随机的注册码用的，注册码由数字0-9、字母A-Z组成。

1 using System;
2 using System.Collections.Generic;
3 using System.Text;
4
5 namespace RandomZhuCeMa
6 {
7     /// <summary>
8     /// 生成随机数[码]帮助类
9     /// </summary>
10     class RandomNumberHelper
11     {
12         private static Random random = new Random();
13         private static IList<string> sourceList = new List<string>();
14         /// <summary>
15         /// 构造一个List:值域为：0-9,A-Z
16         /// </summary>
17         static RandomNumberHelper()
18         {
19             for (int i = 0; i <= 9; i++)
20             {
21                 sourceList.Add(i.ToString());
22             }
23             for (int i = (int)'A'; i <= (int)'Z'; i++)
24             {
25                 sourceList.Add(Convert.ToString((Char)i));
26             }
27         }
28
29         /// <summary>
30         /// 根据指定长度生成随机码
31         /// </summary>
32         /// <param name="selectCount">随机码长度</param>
33         /// <returns></returns>
34         public static string GetRandomZhuCeMa(int Length)
35         {
36             StringBuilder newRandom = new StringBuilder(Length);
37
38             if (Length > sourceList.Count)
39                 throw new ArgumentOutOfRangeException("Length必需小于sourceList.Count");
40
41             for (int i = 0; i < Length; i++)
42             {
43                 int nextIndex = GetRandomNumber(1, sourceList.Count);
44                 newRandom.Append(sourceList[nextIndex - 1]);
45             }
46             return newRandom.ToString();
47         }
48
49         /// <summary>
50         /// 生成一个整数大于等于最小值，小于等于最大值
51         /// </summary>
52         /// <param name="minValue">最小值</param>
53         /// <param name="maxValue">最大值</param>
54         /// <returns>整数，大于等于最小值，小于等于最大值</returns>
55         public static int GetRandomNumber(int minValue, int maxValue)
56         {
57             return random.Next(minValue, maxValue + 1);
58         }
59
60     }
61 }