AJAX 中Sys.WebForms.PageRequestManager的事件激发顺序

测试代码如下:

 

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Test.aspx.cs" Inherits="AjaxCtpWebDemo.Test" %>

 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

 

<html xmlns="http://www.w3.org/1999/xhtml" >

 <head runat="server">

     <title>无标题页</title>

 </head>

 <body>

     <form id="form1" runat="server">

     

        <asp:ScriptManager ID="ScriptManager1" runat="server">

         </asp:ScriptManager>

         <%=DateTime.Now.ToString() %><hr/>

         <asp:UpdatePanel ID="UpdatePanel1" runat="server">

             <ContentTemplate>

                 <%=DateTime.Now.ToString() %>

                 <hr/>

                 <asp:Button ID="Button1" runat="server" Text="Button" />

             </ContentTemplate>

         </asp:UpdatePanel>

        <script  type="text/javascript" language="javascript">

           Sys.WebForms.PageRequestManager.getInstance().add_initializeRequest(

       function(sender, e)

       {

           alert("add_initializeRequest");   

       }

   );

   

   

   Sys.WebForms.PageRequestManager.getInstance().add_endRequest(

       function(sender,e){

           alert("add_endRequest");

       }

   );

   

   

   Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(

       function(sender,e){

           alert("add_beginRequest");

       }

   );

   

   

   Sys.WebForms.PageRequestManager.getInstance().add_pageLoaded(

       function(sender,e){

           alert("add_pageLoaded");

       }

   );

   

   Sys.WebForms.PageRequestManager.getInstance().add_pageLoading(

       function(sender,e){

           alert("add_pageLoading");

       }

   );

   

   </script> 

  

     </form>

 </body>

 </html>

 

 

 





最终结果如下:

 

1.页面第一次进入时,会首先激发add_pageLoaded事件

 

2.异步提交时,事件的激发顺序如下:

 

add_initializeRequest

 

add_beginRequest

 

add_pageLoading

 

add_pageLoaded

 

add_endRequest

 

add_pageLoaded

  

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