Question

I use this in XAML to load the treeview children from a view model based on Josh Smith’s sample code here:

<TreeView.ItemContainerStyle>
        <Style TargetType="{x:Type TreeViewItem}">
            <Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay}" />
            <Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}" />
        </Style>
</TreeView.ItemContainerStyle>

This causes the theme I’m using for TreeViewItem to be ignored. It makes the selected item text black and the background darkblue so it’s hard to read. Is there a way to use both the theme and the code above at the same time?

Answer 1

Try setting BasedOn to {StaticResource {x:Type TreeViewItem}}.

This will take the default style for TreeViewItems (which is provided by the theme) as the base for your style.