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c#验证码怎么弄（c# 验证码）

通信资讯访客 2022-10-12 22:31:48 浏览：30 评论：0

代码如下：

123456789101112131415161718192021 string ss = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";Random a = new Random();int b;string yan = "";for (int i = 0; i < 4; i++){b = a.Next(62);yan += ss.Substring(b, 1);}Console.WriteLine("验证码是：" + yan);Console.Write("请输入验证码：");string c = Console.ReadLine();if (c.ToUpper() == yan.ToUpper()){Console.WriteLine("验证码正确！");}else{Console.WriteLine("验证码错误！");}Console.ReadLine();