验证码生成-->漂亮啊

验证码不用输出太多的HTML代码,直接创建一个一般处理程序,直接上代码

 public class VCode : IHttpHandler
    {

        HttpContext context = null;
        public void ProcessRequest(HttpContext context)
        {
            this.context = context;
            CreateVImage(CreateRandomNum(4));
        }

        #region 创建随机数 CreateRandomNum(int NumCount)
        /// <summary>
        /// 创建随机数
        /// </summary>
        /// <param name="NumCount">条形码上的数字个数</param>
        /// <returns>返回随机数</returns>
        private string CreateRandomNum(int NumCount)
        {
            string allChar = "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z";
            string[] allCharArr = allChar.Split(',');
            string randomNum = "";
            int temp = -1;//记录上次随机数的数值,尽量避免产生几个相同的随机数
            Random random = new Random();
            for (int i = 0; i < NumCount; i++)
            {
                if (temp != -1)
                {
                    random = new Random(i * temp * ((int)DateTime.Now.Ticks));
                }
                int t = random.Next(36);
                if (temp == t)
                {
                    return CreateRandomNum(NumCount);
                }
                temp = t;
                randomNum += allCharArr[t];
            }
            return randomNum;
        }
        #endregion

        #region 生成验证码图片  CreateVImage(string validateNum)

        /// <summary>
        /// 生成验证码图片 CreateVImage(string validateNum)
        /// </summary>
        /// <param name="validateNum">验证码数字</param>
        private void CreateVImage(string validateNum)
        {
            if (validateNum == null || validateNum.Trim() == string.Empty)
            {
                return;
            }
            //生成Bitmap图像
            Bitmap image = new Bitmap(validateNum.Length * 12 + 10, 22);
            Graphics g = Graphics.FromImage(image);
            try
            {
                //随机数生成
                Random random = new Random();
                //清空图片背景色,将背景色换为白色
                g.Clear(Color.White);
                //画图片的背景线
                for (int i = 0; i < 25; i++)
                {
                    int x1 = random.Next(image.Width);
                    int x2 = random.Next(image.Width);
                    int y1 = random.Next(image.Height);
                    int y2 = random.Next(image.Height);
                    g.DrawLine(new Pen(Brushes.Beige), x1, y1, x2, y2);
                }
                //设置字体
                Font font = new Font("Arial", 12, (FontStyle.Bold | FontStyle.Italic));
                //设置笔刷
                System.Drawing.Drawing2D.LinearGradientBrush brush =
                    new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true);
                //用设置好的字体和笔刷将验证码写到图片上
                g.DrawString(validateNum, font, brush, 2, 2);
                //画图片上的点
                for (int i = 0; i < 100; i++)
                {
                    int x = random.Next(image.Width);
                    int y = random.Next(image.Height);
                    image.SetPixel(x, y, Color.FromArgb(random.Next()));
                }

                //画图片边框线
                g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width, image.Height);
                //创建一个内存流
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                //将图片保存到指定流中,并指定图片格式
                image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
                //清空缓存区所有内容输出
                context.Response.ClearContent();
                context.Response.ContentType = "image/jpeg";
                context.Response.BinaryWrite(ms.ToArray());
            }
            catch (Exception ex)
            {
                context.Response.Write("异常..."+ex.Message);
            }
            finally
            {
                //释放资源
                g.Dispose();
                image.Dispose();
            }

        }
        #endregion

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }

直接复制过去,改下类名直接可用,效果图如下:

周围黑的不是验证码生成的,截图原因而已