Thanks for this wonderful post. I am tring to use it with an Accordion. I am unable to do so, kindly help correct my syntax

protected void Page_PreRender(object sender, EventArgs e)
    {
        ArrayList ClientIDs = new ArrayList();
 
        for (int p = 0; p < MyAccordion.Panes.Count; p++)
        {
            ListView lvOrderHistory = (ListView)MyAccordion.Panes[p].FindControl("lvOrderHistory");
 
            ClientIDs.Add(string.Format("'{0}'", lvOrderHistory.Items[p].FindControl("UpdatePanel1").ClientID));
 
 
 
        }
        string script = string.Format("var RepeaterUpdatePanels = new Array({0});", string.Join(",", ClientIDs.ToArray()));
 
        ClientScript.RegisterClientScriptBlock(typeof(Page), "UpdatePanelIDs", script, true);
 
    }

Thanks

This didn’t work for me – couldn’t click and get a refresh/postback. Even tried turning it into a span, and adding runat=”server” – didn’t work either of those ways, either. I’m trying to use a button to fill a DataTable, do a “foreach” loop and have a field from each record appear (very fast) through a label control in an UpdatePanel. Right now it will only refresh at the end, even though I have an UpdatePanel1.Update() in the loop. Not sure why it doesn’t refresh the label. Any help?

-Tom

If you call __doPostBack(‘UpdatePanel1′, ”) on the client-side, __EVENTTARGET will be “UpdatePanel1″ in ol1 and ol2. Test that it is “UpdatePanel1″ in ol1 and “UpdatePanel2″ in ol2.

This works like a charm.

If anyone should be interested I simply put a line of javascript code in the pages that should auto-postback:

setTimeout("__doPostBack('MainUpdatePanel', '')", 900000);

This executes ‘__doPostBack’ for my update panel ‘MainUpdatePanel’ every 15 minutes, so I can save a draft of what the user has done so far.

Have implemented this solution on a panel which contains a mixture of client buttons (anchor tags) and asp controls (linkbuttons).

All is fine except that the last line of code executed when an asp linkbutton is clicked is a response.redirect(“otherpage.aspx”).

Unfortunately this line is completely ignored. Doesn’t cause any error its just ignored ie. new page is not loaded.

Anyone know a way out this

Wing Yip

Thanks Dave for confirming this issue with me!

I still want to try to make it work with update panels and __doPostBack(). Although I can put __doPostBack() in pageLoad function to initiate a postback for each update panel or control with update panel, there is another problem, that I encountered and you have already posted here: http://encosia.com/2009/03/25/document-ready-and-pageload-are-not-the-same/

So, pageLoad doesn’t seem like a working method to solve that problem. But, maybe, through some manipulations with Sys.Application.add_init(function()) it would be possible to achieve the result?

It’s a little weird that if you have a button in each update panel or control with update panel, and you click that button everythere, when in fact, the loading of the panels would be simultaneous.

So, it is possible, just curious if I can find a way to initiate such postback for all these update panels (or controls with update panels) when the page loads.

Anyways, thanks for you blog, it’s extremely useful.

Take a look at this technique instead: http://encosia.com/2008/02/05/boost-aspnet-performance-with-deferred-content-loading/

And thanks to Encosia for being google friendly