Determine what element caused the Postback when handling the endRequest event

Hi All,

I have an UpdatePanel with 2 buttons. Pressing either of them causes a Postback and the panel gets refreshed.

I'm handling the endRequest event on the client side. Is there a way to determine which of the page elements caused the Postback?

Thanks,

Uzi

Try here:

http://www.eggheadcafe.com/articles/20050609.asp

Hi,

you can determine the postback element on the client side with the PageRequestManager. Attach to the beginRequest event and you can save the postback control. More information here:

http://ajax.asp.net/docs/ClientReference/Sys.WebForms/BeginRequestEventArgsClass/default.aspx

Regards
Marc André

Here is a neat way to get it done:

In the 'BeginRequest' event handler insert the postback element to the UserContext of the WebRequest:

function BeginRequestHandler(sender, args)

{

var elemName = args.get_postBackElement().id;var request = args.get_request();

request.set_userContext(elemName);

}

Then, when the request ends, at the 'EndEvent' get the information from the Response object:

function EndRequestHandler(sender, args)

{

var response = args.get_response();

alert(response._webRequest.get_userContext());

}

Thanks,

Uzi

Detailsview in UpdatePanel - Master$Content$dvParameters$ctl03 could not be located...

Hi,

I have this weird problem that just started to happen today and I have no idea what caused it:

I have a DetailsView bound to a SqlDataSource in an UpdatePanel. Whenever I edit something in the DetailsView and initiate the async postback, I get:

"An error has occurred because a control with id 'Master$Content$dvParameters$ctl03' could not be located or a different control is assigned the sameID after postback".

Any idea what could be wrong here?

Thanks,

Tom

Ok, I've found out that this happened because I accidentally changed the MasterPage ID in its OnLoad method rather than in the OnInit method