The problem is that the Item
class is an abstract class, which is a base class for all items of the RibbonBar (Buttons, SplitButtons, Menus etc.). You cannot add an item of class Item
directly to the group. It has to be one of the aforementioned classes. And at the moment, you can only do it by manually adding the items in the code. You can find what kind of items the RibbonBar supports, and how to declare them in the following demo:
We've already noticed that the option to add Items is available in the properties window, since it is generated automatically. We will fix this issue by hiding this option for the next release.
the Telerik team
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