Martijn Veken

I think you meant to use 'eventName' as your first parameter in the function signature.  Otherwise, 'eventName' is not recognized ... only 'eventTargetName'

I was looking for something like this. Thanks.

Fantastic post, worked perfect!

Thanks

Thanks.. that was perfect

Perfect!

Hi Martinjn!!

I tried your solution, and it almost works for me. I have an UpdatePanel with a custom control inside of it (ID=romulo : IPostBackEventHandler) and a button (ID=CallBackHome) outside. My intention is to do an async postback when CallBackHome is clicked. This postback has to be received by romulo. However, it crashes in the following function from the Microsoft Ajax lib, more specifically at 'if (e) throw e;'. If I skip that line it works perfectly. Any clue you could give me?? Thanks in advance!

<code>

Sys.WebForms.BeginRequestEventArgs = function Sys$WebForms$BeginRequestEventArgs(request, postBackElement) {

   /// <param name="request" type="Sys.Net.WebRequest"></param>

   /// <param name="postBackElement" domElement="true"></param>

   var e = Function._validateParams(arguments, [

       {name: "request", type: Sys.Net.WebRequest},

       {name: "postBackElement", domElement: true}

   ]);

   if (e) throw e;

   Sys.WebForms.BeginRequestEventArgs.initializeBase(this);

   this._request = request;

   this._postBackElement = postBackElement;

}

</code>

Excellent solution. My scenario was clicking on the Label should open a Modal Pop-Up after performing few operations in Code-Behind. The page was really should the post back even though it was in UpdatePanel. Your blog gave me the Answer!!!

function OpenModal(btnHDNCI)

       {

           var btnHDN = document.getElementById(btnHDNCI);

           doPostBackAsync(btnHDNCI,'OnClick');

                           //            __doPostBack("'"+btnHDNCI+"'",'OnClick');  //--- This actually did full postback

       }

       function doPostBackAsync( eventName, eventArgs )

       {

           var prm = Sys.WebForms.PageRequestManager.getInstance();

           if( !Array.contains( prm._asyncPostBackControlIDs, eventName) )

           {

               prm._asyncPostBackControlIDs.push(eventName);

           }

           if( !Array.contains( prm._asyncPostBackControlClientIDs, eventName) )

           {

               prm._asyncPostBackControlClientIDs.push(eventName);

           }

           __doPostBack( eventName, eventArgs );

       }

Richiamando la funzione Javascript __doPostBack da una pagina ASP .NET, è possibile eseguire il PostBack

Mediante JavaScript è possibile eseguire programmaticamente un post della pagina mediante il richiamo

Sweet!

Great solution; One thing though - If the UpdatePanel's UpdateMode is set to Conditional, a server side call to myUpdatePanel.Update(); is needed, or else the partial page postback won't be visible on the client side.

Explendid! It solved my problem on first run. Thank you ALOT!

Thanks!

Thank you, you saved me a lot of time!

Just one comment - this only works if the eventName is the clientId of the control, not the Id... Also, I did prm._doPostBack instead - otherwise it was still doing a full postback.

Cheers!

I have tried using the above within user control which I embeded into SharePoint site via webpart.

I get following error

prm._asyncPostBackControlIDs is null or not an object

what am I doing wrong

Great Work.

Thanks

Excellent. Exactly what I wanted.

Just one thing I had to change. I had to call it using setTimeout instead of a direct call. Not exactly sure why. Maybe something to do with the way in which I was using it. Anyway, just called it like this and it worked perfectly.

setTimeout('doPostBackAsync(\'' + gblHdnRef.Id + '\',\'\')', 0);

You guys are awesome! I've been searching and trying methods to get proper async postback working for more than an hour.

Thanks to Martijn Veken's main post and Avi's comment it's now working the way it should.

I usually avoid making "thank you" comments when I don't have anything constructive to add, but I have to make exceptions every now and then when I'm faced with such awesomeness.

Brilliant, just what i was looking for

Thanx Buddy

After crawling on my hands and knees though search after search I finally stumbled on this holy grail.

Google put great info like this at the top of your searches.

Thanks.

Excellent solution.

SCRIPT5009: 'Sys' is undefined

Thanx Bro.. Awesome work..  Helped me in the first go..