c#产生验证图片

using System;using System.Web;using System.Drawing ; /// <summary> /// Png 的摘要说明。 public sealed class LocalPng:IHttpHandler     {  #region IHttpHandler 成员       public  void ProcessRequest(HttpContext context)  {   if(context.Request["key"]!=null&&context.Request["key"].Length ==4)//还有ACSSI码是1-9的数字和a-z的字母   {    string machine_key=context.Request["key"];    context.Response.Clear();     try    {  //原图     Bitmap sImage = new Bitmap(context.Server.MapPath("key.png.bmp"));   //图片路径        //验证码图          Graphics wg = Graphics.FromImage(sImage);            wg.DrawString(machine_key,new Font("Comic Sans MS",14),new SolidBrush(Color.RoyalBlue),3,0);           wg.Save();        context.Response.ContentType = "image/Jpeg";     sImage.Save(context.Response.OutputStream,System.Drawing.Imaging.ImageFormat.Jpeg);         wg.Dispose();        sImage.Dispose();       }    catch(Exception e)    {context.Response.Write(e.Message);    }     context.Response.End();      }    }

  public bool IsReusable  {   get   {    // TODO:  添加 CodeKey.IsReusable getter 实现    return false;   }  }

  #endregion }

转载于:https://www.cnblogs.com/tuyile006/archive/2006/10/31/545419.html

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