Infragistics Forums

I have an ultraweblistbar that I load dynamically with 13 groups; When I was using 2008 vol. 1 for .NET, the listbar loads with the 13 groups and works properly. I recently upgraded to .NET 2008 Vol. 2; with volume 2 the listbar also loads properly with the 13 groups, but when I hover over the UltraWebListBar I get two javascript errors:

1. 'Control.Events' is null or not an object

2. 'this.Control' is null or not an object - if I enable script debugging, it fails in a file called webresource.axd, and the line it fails on has the following code. return this .enabled && this.Control.getEnabled()

 I also notice that is happens when I have 10, 13 or even 14 groups. This seems to be a sporadic issue. I know it has nothing to do with my code, because the listbar worked fine before the upgrade. When I did the upgrade, I opened the project in Visual Studios and went to Tools > Infragistics .Net Project Upgrade Add-In...the upgrade was successful, changing all the necessary dll references in the aspx, ascx, web.config files. Please help me with this issue. What is the work around? fix? or should i roll-back to Vol. 1?

Hello,

I am trying to reproduce the problem, unfortunately to no avail... in my side is all right.

Could you please send a little bit more information about your project to try solving problem - this will surely provide additional clues. ASPX declaration, code-behind - anything that can get us started is welcome.

You can also  submit this problem to devsupport at:

 http://devcenter.infragistics.com/Protected/SubmitSupportIssue.aspx

Thanks for the help, but I already contacted someone through the knowledge base. I have been communicating with someone from the Developer Support Engineer team. I sent him my code, and he has been able to reproduce the issue. He has logged the behavior with your developers in your tracking system, with an issue ID of BR34632. He said if a resolution is reached that i will be contacted. He gave it the following description:

Description: "The UltraWebListBar throws java script error "Microsoft Jscript runtime error" 'this.Control' is null or not an object" on mouse hover"

Thanks again!

p.s. I will make a post to this thread when I am contacted with a resolution.

Any chance you got a response on this issue?  I have the same problem...

Thanks!

I still have not recieved a response on this issue. When I check "My Help Center", the status states that it is still "In Development". The incident # is WLB1458; that way you can check up on it every so often to see if it has been resolved. I ended up rolling back to version 8 volume 1. Version 8 volume 2 has to many bugs. I also found a bug with the UltraWebGrid; if you set LoadOnDemand to XML and Browser to XML, the styling doesn't work properly at runtime; I use the UltraWebGrid a lot. Even though version 8.2 fixes some of the minor issues with the WebGrid from 8.1, I don't have the time to deal with the even bigger issues in 8.2. I didn't post the UltraWebGrid issue, because I got fustrated that it is taking so long for them to fix the Listbar issue.

I like using Infragistics; it has so many neat features, but the turn around on issues takes too long. If I were you just rollback to 8.1, less headaches! I will definately make a post to this thread when the issue has been completed. Sorry that I don't have any good news for you, but rolling back to version 8 volume 1 has been the best decision I have made. I hope this helps.

I had the same issue with the javascript errors. There is an easy fix. If you set the ID of the control in your code, the errors go away.

I tried setting the ID in codebehind but it doesn't work .

Hi there. 

Any update on this error as I am experiencing the same error?