Comments on: Dealing with "Sys.InvalidOperationException: Handler was not added through the Sys.UI.DomEvent.addHandler method."

By: dmehers

dmehers — Sun, 01 Nov 2009 14:11:39 +0000

Hi Brad,

I’m afraid I’m not so immersed in the ASP.NET AJAX world any more, so I can’t offer any additional suggestions.

Sorry!

Damian

By: Brad

Brad — Fri, 30 Oct 2009 17:35:46 +0000

Hi Damian,

I am trying to fix the same issue in my page, although I am using the MultiHandleSliderExtender control instead of the toolkit extender you were using.

I have 8 or 9 MultiHandleSliderExtender (to do search ranges on different datapoints), and 4 or 5 ajax combo boxes. I get the “Sys.InvalidOperationException: Handler was not added through the Sys.UI.DomEvent.addHandler method” every time the page posts back. I’ve tried both with an UpdatePanel and without one, and both give the same error.

Do you have any additional insight as to how I might fix it? I am not manually calling any functions OnDispose of the objects as you were in your example, but thought you might have an additional suggestion.

Thanks!

By: Agha Usman

Agha Usman — Fri, 29 May 2009 15:14:55 +0000

No luck for me on this one …

By: Sujith Sreedhar

Sujith Sreedhar — Wed, 17 Dec 2008 07:14:02 +0000

Thanks for the solution,

I have been wildly searching a solution for this error.

By: Shashank

Shashank — Thu, 20 Mar 2008 11:17:26 +0000

hi,
I recently started using the AJAX toolkit. ListSearchExtender is 1 of the coolest in the kit. I have question, can we make some changes so that hidden div is shown and the user can actually type in the div instead of the listbox. i know that would b difficult thing for me,the way i see the code i hav lot to learn. is it possible by u to do that…

thanks much,

By: Urs Enzler

Urs Enzler — Mon, 03 Sep 2007 11:12:18 +0000

Thanks for the info, faced the same problem with an extender of my own.

It’s a pity because clearHandlers would be very nice to use