No Style Inheritance Inside ItemsControl / DataTemplate in WPF?

Question

can anyone explain why the TextBlock inside my DataTemplate does not apply the style defined in my UserControl.Resources element, but the second TextBlock ('Test B') does?

I think it may have to do with a dependency property somewhere set to not inherit, but I can't be sure.

<UserControl.Resources>       
    <Style  TargetType="{x:Type TextBlock}">
        <Setter Property="Padding" Value="8 2" />
    </Style>
</UserControl.Resources>
<StackPanel>
    <ItemsControl ItemsSource="{Binding}">         
        <ItemsControl.ItemTemplate>
            <DataTemplate>
                <!--Padding does not apply--> 
                <TextBlock>Test A</TextBlock>
             </DataTemplate>
        </ItemsControl.ItemTemplate>
    </ItemsControl>
    <!--Padding applies-->
    <TextBlock>Test B</TextBlock>
</StackPanel>

Possible duplicate of [Why doesn't my TextBlock/TextBox apply values from a Base Style?](http://stackoverflow.com/questions/7597455/why-doesnt-my-textblock-textbox-apply-values-from-a-base-style) — ASh, Dec 01 '16 at 09:33
I don't know why this happens, but if you give the style an x:Key and then apply it as static resource it will work. — adminSoftDK, Dec 01 '16 at 09:48

score 5 · Accepted Answer · edited Mar 25 '20 at 18:57

5

Templates are considered as a boundary. Elements within the templates falls in this boundary range, and look up for the style with a matching target type ends within this range at runtime as a result the TextBlock outside will pickup the style and the one inside wont. like adminSoftDK said you should give the style an x:Key and then apply it as static resource it will work.

edited Mar 25 '20 at 18:57

StayOnTarget

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answered Dec 01 '16 at 12:17

Vishnu Babu

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No Style Inheritance Inside ItemsControl / DataTemplate in WPF?

1 Answers1