I've got a XamDataGrid where one column (Column A) uses a XamComboEditor with a set number of choices, and an adjacent column (Column B) also using a XamComboEditor, should use a particular set of choices based on the selection in Column A.

I'm open to suggestions for how best to accomplish this, but I have this much so far:

I've created several styles as resources for the control with different ItemsProvider settings. 

Column A has a SelectedItemChanged event handler.

In the ColumnA_SelectedItemChanged method, I check the newly selected value, and I want to change the EditorStyle for the changed record's Column B to the one with the appropriate ItemsProvider. 

The problem I'm having with this approach is how to identify the changed record within the SelectedItemChanged event. The method footprint, which I got from another forum post, is ColumnA_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e). The event args just have the new and old values, and there doesn't seem to be a way to get a handle on the record from the XamComboEditor object.

So is there a way to modify this event handler, maybe with a different type for the event args, which would get me a handle on the Record? Or is there another way I should approach this problem?

Thanks.