摘要：
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摘要：
/// /// 产生随机字符串 /// /// 随机出几个字符 /// 随机出的字符串 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( 阅读全文