Why the WPF Window always get Default Style?

Question

I have tried to set the Style for WPF Window in XAML. I am able to see my changes in VS Designer, but when I run the application it will always get the default Style.

Not Working:

<Style TargetType="Window">
    <Setter Property="Background" Value="Red"/>
</Style>

If I give that Style with Key and applying that Style to Window then it is working.

Working:

<Style x:Key="window" TargetType="Window">
    <Setter Property="Background" Value="Red"/>
</Style>

There is any reason need to give Style with key for Window?

Can any one please explain what is going on?

Anatoliy Nikolaev · Answer 1 · 2013-08-02T18:34:30.553

It is necessary to add construction in Window:

Style="{StaticResource {x:Type Window}}"

Style is in the file App.xaml:

<Application x:Class="WindowStyleHelp.App"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         StartupUri="MainWindow.xaml">

    <Application.Resources>
        <!-- In this case, the key is optional --> 
        <Style x:Key="{x:Type Window}" TargetType="{x:Type Window}">
            <Setter Property="Background" Value="Pink" />
        </Style>
    </Application.Resources>
</Application>

Window in XAML:

<Window x:Class="WindowStyleHelp.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525"
    Style="{StaticResource {x:Type Window}}"
    WindowStartupLocation="CenterScreen">

    <Grid>

    </Grid>
</Window>

score 0 · Answer 2 · answered Aug 02 '13 at 18:21

0

Try

<Style TargetType="{x:Type Window}">
    <Setter Property="Background" Value="Red"/>
</Style>

answered Aug 02 '13 at 18:21

Sean Beanland

1,098
1
10
25

2

and how it is different from what OP posted in his question ? – Nitesh Aug 02 '13 at 18:23

Rohit Vats · Answer 3 · 2013-08-02T19:25:51.523

Target types in style doesn't get applied on derived types.

Either you use StaticResource to apply key on all your windows -

<Application x:Class="WpfApplication4.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:WpfApplication4"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
        <Style x:Key="MyStyle" TargetType="Window">
            <Setter Property="Background" Value="Red"/>
        </Style>
    </Application.Resources>
</Application>

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        Style="{StaticResource MyStyle}">

OR

Define a style for your type (derived window) in resources like this -

<Application x:Class="WpfApplication4.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:WpfApplication1"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
        <Style TargetType="{x:Type local:MainWindow}">
            <Setter Property="Background" Value="Red"/>
        </Style>
    </Application.Resources>
</Application>

Thanks for your answer.but i have searched over in google unable to find any link related to the following."Target types in style doesn't get applied on derived types." Can you please share any link? — Ravuthasamy, Aug 03 '13 at 16:01
Refer to the links - http://stackoverflow.com/questions/4279773/wpf-window-style-not-being-applied and http://stackoverflow.com/questions/431940/how-to-set-default-wpf-window-style-in-app-xaml — Rohit Vats, Aug 03 '13 at 16:20

Why the WPF Window always get Default Style?

3 Answers3