Preserving Expanded/Collapsed

[Bob]

Hi,

I have an app with a TabControl. Each item in the TabControl has a RadTreeListView. When I switch between the tabs, the hierarchy in the RadTreeListView gets collapsed. The problem, of course, is that the IsExpanded states is preserved only in the RadTreeListView and TabControl virtualizes its contents, i.e. if there are three tabs, it only creates one RadTreeListView and when the user selects a tab, then only thing that changes is the RadTreeListView's DataContext.

The solution would be to bind each row's IsExpanded property to a property in my ViewModel. But from my reading of other posts in this forum, it appears that binding to a TreeListViewRow's IsExpanded property doesn't work.

How can I preserve the IsExpanded state when I switch between tabs?

Thanks,
    Bob Alexander

[Milan]

Hi Bob,

  You can also try setting the IsContentPreserved property of the tab control to true which will preserve the state of tabs that are not opened. 

Kind regards,
Milan
the Telerik team

[Bob]

Hi Milan,

I'm using the WPF TabControl, not the Telerik one. So I really need a ViewModel-based solution. What are my other option(s)?

Thanks,
   Bob