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
  1  public class VCode : IHttpHandler
  2     {
  3 
  4         HttpContext context = null;
  5         public void ProcessRequest(HttpContext context)
  6         {
  7             this.context = context;
  8             CreateVImage(CreateRandomNum(4));
  9         }
 10 
 11         #region 创建随机数 CreateRandomNum(int NumCount)
 12         /// <summary>
 13         /// 创建随机数
 14         /// </summary>
 15         /// <param name="NumCount">条形码上的数字个数</param>
 16         /// <returns>返回随机数</returns>
 17         private string CreateRandomNum(int NumCount)
 18         {
 19             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";
 20             string[] allCharArr = allChar.Split(',');
 21             string randomNum = "";
 22             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
 23             Random random = new Random();
 24             for (int i = 0; i < NumCount; i++)
 25             {
 26                 if (temp != -1)
 27                 {
 28                     random = new Random(i * temp * ((int)DateTime.Now.Ticks));
 29                 }
 30                 int t = random.Next(36);
 31                 if (temp == t)
 32                 {
 33                     return CreateRandomNum(NumCount);
 34                 }
 35                 temp = t;
 36                 randomNum += allCharArr[t];
 37             }
 38             return randomNum;
 39         }
 40         #endregion
 41 
 42         #region 生成验证码图片  CreateVImage(string validateNum)
 43 
 44         /// <summary>
 45         /// 生成验证码图片 CreateVImage(string validateNum)
 46         /// </summary>
 47         /// <param name="validateNum">验证码数字</param>
 48         private void CreateVImage(string validateNum)
 49         {
 50             if (validateNum == null || validateNum.Trim() == string.Empty)
 51             {
 52                 return;
 53             }
 54             //生成Bitmap图像
 55             Bitmap image = new Bitmap(validateNum.Length * 12 + 10, 22);
 56             Graphics g = Graphics.FromImage(image);
 57             try
 58             {
 59                 //随机数生成
 60                 Random random = new Random();
 61                 //清空图片背景色,将背景色换为白色
 62                 g.Clear(Color.White);
 63                 //画图片的背景线
 64                 for (int i = 0; i < 25; i++)
 65                 {
 66                     int x1 = random.Next(image.Width);
 67                     int x2 = random.Next(image.Width);
 68                     int y1 = random.Next(image.Height);
 69                     int y2 = random.Next(image.Height);
 70                     g.DrawLine(new Pen(Brushes.Beige), x1, y1, x2, y2);
 71                 }
 72                 //设置字体
 73                 Font font = new Font("Arial", 12, (FontStyle.Bold | FontStyle.Italic));
 74                 //设置笔刷
 75                 System.Drawing.Drawing2D.LinearGradientBrush brush =
 76                     new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true);
 77                 //用设置好的字体和笔刷将验证码写到图片上
 78                 g.DrawString(validateNum, font, brush, 2, 2);
 79                 //画图片上的点
 80                 for (int i = 0; i < 100; i++)
 81                 {
 82                     int x = random.Next(image.Width);
 83                     int y = random.Next(image.Height);
 84                     image.SetPixel(x, y, Color.FromArgb(random.Next()));
 85                 }
 86 
 87                 //画图片边框线
 88                 g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width, image.Height);
 89                 //创建一个内存流
 90                 System.IO.MemoryStream ms = new System.IO.MemoryStream();
 91                 //将图片保存到指定流中,并指定图片格式
 92                 image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
 93                 //清空缓存区所有内容输出
 94                 context.Response.ClearContent();
 95                 context.Response.ContentType = "image/jpeg";
 96                 context.Response.BinaryWrite(ms.ToArray());
 97             }
 98             catch (Exception ex)
 99             {
100                 context.Response.Write("异常..."+ex.Message);
101             }
102             finally
103             {
104                 //释放资源
105                 g.Dispose();
106                 image.Dispose();
107             }
108 
109         }
110         #endregion
111 
112         public bool IsReusable
113         {
114             get
115             {
116                 return false;
117             }
118         }
119     }
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