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/// <summary> /// 产生随机字符串 /// </summary> /// <param name="num">随机出几个字符</param> /// <returns>随机出的字符串</returns> private
string GenCode(int
num) { string
str = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; //char[] chastr = str.ToCharArray(); //第二种string
code = ""; Random rd = new
Random(); int
i; for
(i = 0; i < num; i++) { //code += chastr[rd.Next(0, chastr.Length)]; //第二种code += str.Substring(rd.Next(0, str.Length), 1); //第一种} return
code; } |
最后调用即可,想出现几位就写几位
string checkCode = GenCode(6);
原文：http://www.cnblogs.com/mcho/p/3641370.html