Hander妙用

利用javascript 去创建一个img ,通过img去取捞hander
例子：
1.创建一个hander:

<% @ WebHandler Language = " C# "  Class = " LoggingHandler "   %>

using  System;
using  System.Web;
using  System.Collections;
using  JobsDB.DB88.Helpers;

public   class  LoggingHandler : IHttpHandler {
    
     public   void  ProcessRequest (HttpContext context) {     
         string  logtype  =  context.Request[ " logtype " ];
         string  rid  =  context.Request[ " rid " ];
         if  ( ! string .IsNullOrEmpty(logtype))
        {
             switch  (logtype.ToLower())
            {
                 case   " postview " :
                     if  ( ! string .IsNullOrEmpty(rid))
                    {
                        Hashtable ht  =   new  Hashtable();
                        ht.Add( " PostID " ,  int .Parse(rid));
                        SqlHelper.Execute( " IncreasePostViewCount " , ht);
                    }
                     break ;
            }　
        }
        
        
        
    }
 
     public   bool  IsReusable {
         get  {
             return   false ;
        }
    }

}

2.创建一个img,调用这个hander.

<% @ Control Language = " C# "  AutoEventWireup = " true "  CodeFile = " LogHandlerControl.ascx.cs "  Inherits = " Controls_LogHandlerControl "   %>
< script type = " text/javascript " >
  var LogHandlerElem  =  document.createElement( " img " );
  LogHandlerElem.setAttribute( " src " ,  " <%=Url %> " );
  LogHandlerElem.setAttribute( " type " , " jpg/image " );
script >

其中Url是那个hander的地址。