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());
         }

         #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 = -;//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 = ; i < NumCount; i++)
             {
                 if (temp != -)
                 {
                     random = new Random(i * temp * ((int)DateTime.Now.Ticks));
                 }
                 int t = random.Next();
                 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 *  + , );
             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 = ; i < ; 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", , (FontStyle.Bold | FontStyle.Italic));
                 //设置笔刷
                 System.Drawing.Drawing2D.LinearGradientBrush brush =
                     new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(, , 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, , );
                 //画图片上的点
                 for (int i = ; i < ; 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), , , 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;
             }
         }
     }

ValidateCode

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