RadExpander - is it possible to preload contents before expanding?

[Rob]

Hello,

I am working with a RadExpander that starts off "Collapsed".  When the expander is expanded, the animation is choppy because I have several controls inside it that fire OnApplyTemplate to render at the same time.   This is because the items aren't added to the visual tree until the expander is expanded.  Is there a way to trigger that before the item is expanded?  The animation runs smoothly the second and subsequent times once the items have been rendered initially...

Thanks,
Rob

[Pavel R. Pavlov]

Hello Rob,

You are right that the content of the RadExpander is loaded when the control is expended for the first time and this is why you get the reported behavior. Unfortunately, there is no built-in mechanism to force the control to load its content before it is expanded.

The only way to force the control to load its content is to expand and collapse it before visualizing. Please excuse us for the inconvenience caused.

Regards,
Pavel R. Pavlov
Telerik