You should be able to achieve your goal by hooking to the GroupRowIsExpandedChanging
event of RadGridView. Through the event arguments you can access the Row.Group element and save its instances somewhere. Then, when the items are updated you can expand the saved group/groups through the ExpandGroup
method of the control.
In addition, you can take a look at the Grouping events
topic for more information on this matter.
Hopefully, this helps.
Want to extend the target reach of your WPF applications, leveraging iOS, Android, and UWP? Try UI for Xamarin
, a suite of polished and feature-rich components for the Xamarin framework, which allow you to write beautiful native mobile apps using a single shared C# codebase.