摘要:
当然,现在登录界面大部分都会有验证码机制。目的就在于防止注册机的恶意注册。下面来看看简单的验证码实现功能。1.当然是验证码绘制过程:Bitmap bit = new Bitmap(80,30); Graphics g = Graphics.FromImage(bit); g.FillRectangle(Brushes.White, 0, 0, bit.Width, bit.Height); Random r = new Random(); //画线 for (int i = ... 阅读全文