DropDownList option and Scroll

[DenisCL]

Hello,

I come to you in order to expose a problem I meet with RadDropDownList with dropDownlist option.

In fact when I want to scroll almong the items I meet a special behavior where the dropDownlist is scroolling, but the form behind scrool too, and the dropdownlist is finally detached.

Screenshot here

I didn't find any issues in forum regarding this behavior. Is it already referenced at your level?

Any information?

Thanks for your help
Regards

Denis

[Richard Slade]

Hi, 

Are you using quite an old version of the controls? 
I see from the release notes (here) for version 2009.3.9.1203 that there was an issue fixed that describes this behaviour

QUOTE: 
Fixed: The handling of the OnMouseWheel event is now improved which eliminates bugs related with scrolling of container controls on which RadComboBox resides.

I'd suggest upgrading to the latest 2010 Q2 914 Release if you are not on that one already. 
Hope that helps
Richard

[DenisCL]

Hello,

Thanks for answering.

Actually I tried to create a simple project with dropdownlist but I couldn't manage to reproduce this behavior.

And now when I try in my application, this behavior disappeared.
Everything seems fine then, but it's very weird.

Regarding the vesion I'm using, it's the 2010 Q2 sp1.
If I can reproduce it easily, I 'll informed you asap.

Best regards

[Richard Slade]

Morning Dennis, 

Glad that you seem to have it sorted. 
Best regards, 
Richard

[Emanuel Varga]

Hello guys,

This sounds to me like a SuspendLayout() problem, did you use somewhere in your app a SuspendLayout() call without a ResumeLayout(true)? The true part is very important, I've also seen some issues with the grid behaving strangely after a suspend and resume without a perform layout...

Hope this helps, if you have any other questions or comments, please let me know,

Best Regards,
Emanuel Varga

[Peter]

Hi all,

Yes, I agree that probably the issue is caused by a suspended layout. However, we cannot be sure until we research the case. Therefore, Denis, please open a new support ticket and send me a sample application which demonstrates the described behavior. This will allow me to assist you further.
 
All the best,

Peter
the Telerik team