How to execute javascript once an update panel refreshes (Can't get Sys.WebForms.PageRequestManager.getInstance().add_endRequest(); to work)

Question

I'm trying to run javascript once an update panel has refreshed. I've read a few places that you can use code similar to this:

function codeToRun() {
    //Code Here
}

Sys.WebForms.PageRequestManager.getInstance().add_endRequest(codeToRun);

But it doesn't seem to be working... any ideas? I've tried putting the code inside the Content area of the update panel as well as outside of it... haven't had any luck so far. Please let me know if you have any insight to why this might be happening.

Thanks,
Matt

Reason #1827 to switch to MVC. Good question though, as I'm unfortunately still stuck in the quagmire of webforms. — MrBoJangles
– MrBoJangles, Commented Nov 14, 2011 at 17:56

rick schott · Accepted Answer · 2011-11-14 18:10:44Z

8

Everything needs to be outside of the UpdatePanel:

Markup:

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

Script:

if( typeof(Sys) != "undefined" )
{
    Sys.WebForms.PageRequestManager.getInstance().add_initializeRequest(initRequestHandler);     
    Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endRequestHandler);   
}
else
{
    //we have a problem with ScriptManager
}

edited Nov 14, 2011 at 18:10

answered Oct 27, 2009 at 13:17

rick schott

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1 Comment

MrBoJangles Over a year ago

As we're using 'System.Web.UI.ScriptManager.RegisterStartupScript()' on the code-behind, instead of ScriptManager tags, I simply omitted the ScriptManager tags and used the add_endRequest() portion above, and it worked. Cool!

Rex M · Accepted Answer · 2009-10-26 18:35:53Z

0

The call to System.WebForms.PageRequestManager should come after the library has been included and initialized, but probably not inside the UpdatePanel.

answered Oct 26, 2009 at 18:35

Rex M

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2 Comments

Matt Over a year ago

How do you include and initialize it?

Rex M Over a year ago

@Matt it is included when you add the ScriptManager and UpdatePanels to the page - they won't work without them, so that's an easy way to verify they are there :). They're usually near the top of the <body> tag.

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