Please keep in mind that this scenario could not be achieved at this moment, but we are working on two major improvements for the RadComboBox
control that might be very useful in your case.
feature will be included in RadComboBox
functionality with our next RadControls service pack release scheduled for December. Its main purpose will be setting dynamically RadComboBox
width property depending on the widest element in the list.
We are also developing a completely new component - RadTreeView
that will be used out of the box instead of using item templates to achieve that functionality.
Hope that this will lead you into right direction.
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed