winform 登录窗口怎么设置验证码验证登录？

Question

求大神贴出代码来参考一下吧

Answer 1

/// <summary> 
        /// 生成验证码字符串 
        /// </summary> 
        /// <param name="codeLen">验证码字符长度</param> 
        /// <returns>返回验证码字符串</returns> 
        private string MakeCode(int codeLen) 
        { 
            if (codeLen < 1) 
            { 
                return string.Empty; 
            } 
  
            int number; 
            string checkCode = string.Empty; 
            Random random = new Random(); 
  
            for (int index = 0; index < codeLen; index++) 
            { 
                number = random.Next(); 
  
                if (number % 2 == 0)      
                { 
                    checkCode += (char)('0' + (char)(number % 10));     //生成数字 
                } 
                else
                { 
                    checkCode += (char)('A' + (char)(number % 26));     //生成字母 
                } 
            } 
  
            return checkCode; 
        } 生成验证码图片流：?//      ///<summary> 
        /// 获取验证码图片流 
        /// </summary> 
        /// <param name="checkCode">验证码字符串</param> 
        /// <returns>返回验证码图片流</returns> 
        private MemoryStream CreateCodeImg(string checkCode) 
        { 
            if (string.IsNullOrEmpty(checkCode)) 
            { 
                return null; 
            } 
  
            Bitmap image = new Bitmap((int)Math.Ceiling((checkCode.Length * 12.5)), 22); 
  
            Graphics graphic = Graphics.FromImage(image); 
  
            try
            { 
                Random random = new Random(); 
  
                graphic.Clear(Color.White); 
  
                int x1 = 0, y1 = 0, x2 = 0, y2 = 0; 
  
                for (int index = 0; index < 25; index++) 
                { 
                    x1 = random.Next(image.Width); 
                    x2 = random.Next(image.Width); 
                    y1 = random.Next(image.Height); 
                    y2 = random.Next(image.Height); 
  
                    graphic.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2); 
                } 
  
                Font font = new Font("Arial", 12, (FontStyle.Bold |FontStyle.Italic)); 
                LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Red, Color.DarkRed, 1.2f, true); 
                graphic.DrawString(checkCode, font, brush, 2, 2); 
  
                int x = 0; 
                int y = 0; 
  
                //画图片的前景噪音点 
                for(int i=0; i<100; i++) 
                { 
                    x = random.Next(image.Width); 
                    y = random.Next(image.Height); 
  
                    image.SetPixel(x, y, Color.FromArgb(random.Next())); 
                } 
  
                //画图片的边框线 
                graphic.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1); 
  
                //将图片验证码保存为流Stream返回 
                System.IO.MemoryStream ms = new System.IO.MemoryStream(); 
                image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif); 
                return ms; 
            } 
            finally
            { 
                graphic.Dispose(); 
                image.Dispose(); 
            } 
        } 　　在HttpHander的ProcessRequest中进行调用：?pupublic void ProcessRequest(HttpContext context) 
        { 
            string code = MakeCode(5); 
  
            context.Response.ClearContent(); 
            context.Response.ContentType = "image/Gif"; 
  
            MemoryStream ms = CreateCodeImg(code); 
            if (null != ms) 
            { 
                context.Response.BinaryWrite(ms.ToArray()); 
            } 
        } 

Answer 2

楼上已经将验证码的生成过程贴出来了，只要在Winform中使用一个PictureBox显示就OK。