如何判断一个页面加载所耗费的时间【引用】

C# code

  
    

   
     
   
      
   
     public
   
      
   
     class
   
      UrlReWrite : IHttpModule { 
   
     private
   
      DateTime start; 
   
     private
   
      DateTime end; 
   
     public
   
      UrlReWrite() { 
   
     //
   
      
   
     //
   
      TODO: 在此处添加构造函数逻辑 
   
     // 
   
      } 
   
     #region
   
      IHttpModule 成员
   
      
   
     public
   
      
   
     void
   
      Dispose() { 
   
     throw
   
      
   
     new
   
      Exception(
   
     "
   
     The method or operation is not implemented.
   
     "
   
     ); } 
   
     public
   
      
   
     void
   
      Init(HttpApplication context) { context.BeginRequest 
   
     +=
   
      
   
     new
   
      EventHandler(Begin_Request); context.EndRequest 
   
     +=
   
      
   
     new
   
      EventHandler(End_Request); } 
   
     #endregion
   
      
   
     private
   
      
   
     void
   
      Begin_Request(
   
     object
   
      sender, EventArgs e) { start 
   
     =
   
      DateTime.Now; 
   
     //
   
     HttpApplication app = sender as HttpApplication; 
   
     //
   
     string currentUrl = app.Context.Request.RawUrl; 
   
     //
   
     string newUrl = Common.GeneratePhysical(currentUrl); 
   
     //
   
     app.Context.RewritePath(newUrl);
   
      
   
      } 
   
     private
   
      
   
     void
   
      End_Request(
   
     object
   
      sender, EventArgs e) { HttpApplication app 
   
     =
   
      sender 
   
     as
   
      HttpApplication; end 
   
     =
   
      DateTime.Now; TimeSpan t 
   
     =
   
      end 
   
     -
   
      start; app.Context.Response.Write(
   
     string
   
     .Format(
   
     "
   
     <!-- Server:{0} now:{1} exec time: {2}-->
   
     "
   
     , app.Context.Server.MachineName,DateTime.Now, t)); }