UpdateProgress属性DynamicLayout和DisplayAfter

aspx

     < form id = " form1 "  runat = " server " >
         < asp:ScriptManager ID = " ScriptManager1 "  runat = " server " >
         </ asp:ScriptManager >

         < asp:UpdateProgress ID = " UpdateProgress1 "  runat = " server "  DynamicLayout = " false "  AssociatedUpdatePanelID = " UpdatePanel1 " >
             < ProgressTemplate >
                DynamicLayout  =   false
             </ ProgressTemplate >
         </ asp:UpdateProgress >


         < asp:UpdatePanel ID = " UpdatePanel1 "  runat = " server " >
             < ContentTemplate >
                 <%=  DateTime.Now  %>
                 < asp:Button ID = " Button1 "  runat = " server "  Text = " Button "  OnClick = " Button1_Click "   />
             </ ContentTemplate >
         </ asp:UpdatePanel >
        
         < asp:UpdatePanel ID = " UpdatePanel2 "  runat = " server " >
             < ContentTemplate >
                 <%=  DateTime.Now  %>
                 < asp:Button ID = " Button2 "  runat = " server "  Text = " Button "  OnClick = " Button1_Click "   />
             </ ContentTemplate >
         </ asp:UpdatePanel >
        
         < asp:UpdateProgress ID = " UpdateProgress2 "  runat = " server "  DynamicLayout = " true "  DisplayAfter = " 3000 " >
             < ProgressTemplate >
                DynamicLayout  =   true
             </ ProgressTemplate >
         </ asp:UpdateProgress >
        
        
         < hr  />
     </ form >

cs

     protected   void  Page_Load( object  sender, EventArgs e)
    {

    }

     protected   void  Button1_Click( object  sender, EventArgs e)
    {
        Thread.Sleep( 5000 );
    }

Thread.Sleep( 5000 );等待5秒
DynamicLayout，指的是 UpdateProgress隐藏的时候是否占位
DisplayAfter，指的是 UpdateProgress延迟多久才显示（单位：毫秒，1秒=1000毫秒）