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Catch the OnUnload Ajaxevent

  1. #1
    Jun 29, 2010, 10:30 AM

    Catch the OnUnload Ajaxevent

    Hi there,

    I would like to remove some session parameters when I leave a page, in order to free the sessionstate.

    I have tried to do this in the Page_Unload event but it is fired when I go into the page, because is on the server side,

    Well I tried to do in a Ajaxevent with javascript like:

    <html> 
<head> 
    <title>Abre al salir</title> 
    <script> 
    function abreventana(){ 
       window.open("http://www.google.es","venta","") 
    } 
    </script> 
</head>
<body &#111;nunload="abreventana()"> 
...
    The problem is that my page is like this:

    


<%@ Page Language="C#" MasterPageFile="~/Masters/MasterPage.master" AutoEventWireup="true" CodeFile="ModificarPeticionFrm.aspx.cs" Inherits="Conexion_Peticiones_ModificarPeticionFrm" Title="Untitled Page" %>


<%@ Register Src="~/Conexion/Controles/UcModificarPeticion.ascx" TagName="CrearPeticion" TagPrefix="uc" %>


<%@ Register Assembly="Coolite.Ext.Web" Namespace="Coolite.Ext.Web" TagPrefix="ext" %>


 


<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server"> 


<ext:BorderLayout ID="BorderLayout1" runat="server"> 


<Center>


<ext:Panel ID="Panel1" runat="server">


<Body>


<ext:AnchorLayout ID="AnchorLayout1" runat="server">


<ext:Anchor>


<ext:Panel ID="Panel3" runat="server" AutoScroll="true">


<Body>


<uc:CrearPeticion ID="crearPeticion" runat="server" />


</Body> 


</ext:Panel>


</ext:Anchor> 


</ext:AnchorLayout>


</Body> 


</ext:Panel> 


</Center>


</ext:BorderLayout>


</asp:Content>
    And I don't have any idea where could I place the event..

    Any idea??

    Thanx!
  2. #2
    Jun 30, 2010, 4:35 AM

    RE: Catch the OnUnload Ajaxevent

    Hi!

    Try to use pure ExtJs solution like in CometDesktop:
    /* Start listen */
  if ( Ext.isIE )

            
Ext.EventManager.on(window,'beforeunload',this.eventUnloadIE, this);

        else 

            Ext.EventManager.on(window,'beforeunload',this.eventUnload, 
this, true);


/* handles if IE */

       eventUnloadIE: function(e) {

        var _this = this;



        function unload() {

            return _this.eventUnload(e);

        }

                

        function stop() {

            &#100;ocument.detachEvent('onstop', stop);

            return unload(e);

        }

        

        switch ( &#100;ocument.readyState ) {

            case 'interactive':

                &#100;ocument.attachEvent('onstop', stop);

                window.setTimeout(function() {

                    &#100;ocument.detachEvent('onstop', stop);

                }, 0);

                break;

                

            default:

                return unload(e);

                break;

        }

    },

    


/* handles if not IE */

    eventUnload: function(e) {

        
/* Here you can make what you want */

/*var x = Ext.lib.Ajax.createXhrObject();

        x.conn.open('POST','unload.pl',false); // sync request

        

        var originalTitle = &#100;ocument.title;

        &#100;ocument.title = 'Please wait...';



        if (this.fireEvent('beforeunload', this, x) === false) {

            if ( e ) e.stopEvent();

            &#100;ocument.title = originalTitle;

            return;

        }

        

        x.conn.setRequestHeader( 'X-SessionTime', 
this.startTime.dateFormat('c/U') + '~' + ( new Date ).dateFormat('c/U') 
);

        x.conn.setRequestHeader( 'X-LoadTime', this.loadTime );

        x.conn.onreadystatechange = Ext.emptyFn;

        x.conn.send( 'v'+this.config.version  );

        &#100;ocument.title = originalTitle;*/

    }

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