winform随机验证码生成和验证

来源：互联网发布：mac invalid argument 编辑：程序博客网时间：2024/04/19 16:54

int CurrentCheckNo = 0;
DateTime CheckNoTime = DateTime.Now;

              private void AutoCheckNO()     //验证码的生成
        {
            Random rnd = new Random();
            CurrentCheckNo = rnd.Next(100000, 999999);
            CheckNoTime = DateTime.Now;
            this.CheckNo.Text = CurrentCheckNo.ToString();
        }

private void checkno_Click(object sender, EventArgs e)
{

AutoCheckNO();

}

        private void btnLogin_Click(object sender, EventArgs e)
        {
            if (CheckNoTime.AddSeconds(20) <= DateTime.Now)//判断验证码是否超时
            {
                MessageBox.Show("验证码无效！", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Stop);
                AutoCheckNO();
                return;
            }

string ChkNO = edtCheckNo.Text;

            if (!this.CurrentCheckNo.ToString().Equals(ChkNO))
            {
                MessageBox.Show("验证码错误！", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
                AutoCheckNO();
                return;
            }

Program.isLogin = true;
this.Close();

}