Question

I my WPF application I’d like to change the text color by setting Foreground on the main Window like

<Window Foreground="Red">
    <TextBlock Text="Hello World" />
</Window>

This works fine for TextBlocks, but if I add a Button, the font there stays black, since Button has a Setter for Foreground in its default style. can I make a new default style for Button based on the original one, but removing the Foregound setter?

Answer 1

I haven’t tested this, but you could try using a base style in an appropriate resource collection (e.g. at the application level in App.xaml), and then create an implicit style for each type of control based on this base style.

<Style TargetType="{x:Type Control}" x:Key="DefaultControlStyle">
  <Setter Property="Foreground" Value="Red" />
</Style>
<Style TargetType="{x:Type Button}" BasedOn="{StaticResource DefaultControlStyle}" />
<Style TargetType="{x:Type Label}" BasedOn="{StaticResource DefaultControlStyle}" />        
<Style TargetType="{x:Type TextBox}" BasedOn="{StaticResource DefaultControlStyle}" />
<Style TargetType="{x:Type ListView}" BasedOn="{StaticResource DefaultControlStyle}" />

You could also use a relative source binding trick described here.