Style in Application.Resources on All Windows

I try to give all my Windows the same background. To do this I think I
should set a style in the Application.Resources with TargetType = "{x:Type
Window}". This won't work, the background isn't set.

If I use the concrete types of my windows it works as expected. But I must
set for each Window class a style. Better would be that one global setting
on this.

<Style TargetType="{x:Type local:MainWindow}">

<Setter Property="Background" Value="{StaticResource WindowBackground}"/>

</Style>

<Style TargetType="{x:Type dlgs:AboutDialog}">

<Setter Property="Background" Value="{StaticResource WindowBackground}"/>

</Style>

Why the following Code not work ?

<Style TargetType="{x:Type Window}">

<Setter Property="Background" Value="{StaticResource WindowBackground}"/>

</Style>

"MainWindow" and either "AboutDialog" are descendants of Window ???

- Mfg Stefc-

It's because the unnamed styles apply only to the type specified in the
TargetType, it will not affect derived types. I don't know what is the
rationale behind this design decision but this is the way it works.
--
Valentin Iliescu [MVP - Client Application Development]


"Stefc" wrote:

> I try to give all my Windows the same background. To do this I think I
> should set a style in the Application.Resources with TargetType = "{x:Type
> Window}". This won't work, the background isn't set.
>
> If I use the concrete types of my windows it works as expected. But I must
> set for each Window class a style. Better would be that one global setting
> on this.
>
> <Style TargetType="{x:Type local:MainWindow}">
>
> <Setter Property="Background" Value="{StaticResource WindowBackground}"/>
>
> </Style>
>
> <Style TargetType="{x:Type dlgs:AboutDialog}">
>
> <Setter Property="Background" Value="{StaticResource WindowBackground}"/>
>
> </Style>
>
> Why the following Code not work ?
>
> <Style TargetType="{x:Type Window}">
>
> <Setter Property="Background" Value="{StaticResource WindowBackground}"/>
>
> </Style>
>
> "MainWindow" and either "AboutDialog" are descendants of Window ???
>
> - Mfg Stefc-
>
>
>