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  • 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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  • 原文地址:https://www.cnblogs.com/zgblog/p/2555375.html
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