Detect ASP.Net Asynchronous PostBack using PageRequestManager Events in JavaScript

Question

How to Detect ASP.Net Asynchronous PostBack and its settings like control and UpdatePanel that caused PostBack and the using PageRequestManager Events in JavaScript and here is an example of what I am doing :

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="up1" runat="server">
    <ContentTemplate>
        <asp:Button ID="Button1" runat="server" Text="Button" />
    </ContentTemplate>
    <Triggers>
    <asp:AsyncPostBackTrigger ControlID = "Button1" EventName = "Click" />
    </Triggers>
</asp:UpdatePanel>
</form>

<script type="text/javascript">
//////////////
//some javascript code 
/////////////
</script>
</body>
</html>

What I want is to use JavaScript to detect this post back.

Eslam Soliman · Accepted Answer · 2011-08-03 11:02:58Z

1

var prm = Sys.WebForms.PageRequestManager.getInstance();
if (prm != null) {
    prm.add_beginRequest(function (sender, e) {
        //Event raised when the Async Postback is started.

        //Detect whether the request is Async
        var isAsync = sender._postBackSettings.async;

        //Detect Id of the control that caused the postback.
        var controlId = sender._postBackSettings.sourceElement.id;

        //Id of the updatepanel that caused the postback
        var updatePanelId = sender._postBackSettings.panelID.split('|')[0];
    });
}
prm.add_endRequest(function (sender, e) {
    if (sender._postBackSettings.panelsToUpdate != null) {
        //Event Raised when the Async Postback is completed.
    }
});

put this and tel me the result :) you know that the same article is posted in this link with the same code : http://www.aspsnippets.com/

if you do not understand ask for explaining :)

edited Aug 3, 2011 at 11:02

answered Aug 3, 2011 at 9:38

Eslam Soliman

1,2965 gold badges17 silver badges42 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Detect ASP.Net Asynchronous PostBack using PageRequestManager Events in JavaScript

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related