Combobox causes repaint of entire Form

[Jan Hesselgren]

Hello.

I have a RadForm with a lot of controls on it(Multiple radgridviews, radcomboboxes, a tabstrip with radgridviews, etc).
Every time i click any of the radcomboboxes it takes about two seconds of flickering while all controls are repainted, then when i select an item from the combobox, all controls are repainted again.
I have tried using Virualized=True/False, BeginEdit/EndEdit, Populating combobox in Runtime/Designtime in all possible combinations but the behaviour is consistent.

Have I missed anything, how can I solve the problem?

I'm working on a 2GB RAM machine and am only working with small datasets, version of Radcontrols is 2008 Q1 SP1.

Thanks

[Martin Vasilev]

Hi Jan Hesselgren,

Thank you for the project.

The behavior you have reported is a known issue. We are working to improve RadForm performance and behavior. This includes the flickering issue but I cannot give you a timeframe when it will be addressed.

Currently, I can suggest using ShapedForm with RadTitleBar instead of RadForm. It has better performance, and could resolve the issue.

If you have other questions, do not hesitate to contact me again.

Regards,
Martin Vasilev
the Telerik team

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