The same works fine with the old Nested mode.
Hi Tobias, I am sorry to hear this important to you functionality is still not available. Since the issue is not reproducible with the old “Nested” mode, may I ask you to try not setting GroupRenderMode=”Flat” (i.e. using the default GroupRenderMode=”Nested”)? For example: <telerik:RadGridView x:Name="PeopleGrid" ItemsSource="{Binding People}" AutoExpandGroups="False"> <telerik:RadGridView.GroupRowStyle> <Style TargetType="telerik:GridViewGroupRow" BasedOn="{StaticResource GridViewGroupRowStyle}"> <Setter Property="IsExpanded" Value="{Binding Converter={StaticResource SomeConverter}, FallbackValue=True}" /> </Style> </telerik:RadGridView.GroupRowStyle> </telerik:RadGridView>
Half a year has passed and this is still not fixed?