使用XAML设置窗口背景颜色

Question

I have a standard XAML styled window in WPF (< Window ....)

In this window I insert a resource dictionary

 <Window.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="Style/Global.xaml" />
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
</Window.Resources>

In the Global.xaml dicionary I have the following code:

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

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

Nothing out of ordinary anywhere. Except it doesn't work, when I compile and run the app, the window background is shown in default white. BUT in the designer tab in Visual Studio where you can see the preview of your window, the background color is correctly changed to red. I don't understand. I don't have any other styles inserted anywhere that could be overwriting the window's background color. So how is it possible that in the preview tab it works correctly, but when i actually run the app, it doesn't? What am I doing wrong here?

---

Here is the entire window code:

<Window x:Class="Apptest.EditBook"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="EditBook" Height="300" Width="300">
 <Window.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="Style/Global.xaml" />
            <ResourceDictionary Source="Style/Controls.xaml" />
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
  </Window.Resources>
        <Grid>

   </Grid>
 </Window>

Answer 1

OK... So this is because your window is actually a type deriving from Window...

public partial class EditBook : Window { }

Target type does not yet work with derived types so you will need to add a key to the style and add it to each window you create that you want to use the style for..

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

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

then you will need to apply the style in the window...

<Window x:Class="Apptest.EditBook"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="EditBook" Height="300" Width="300" Style="{StaticResource MyWindowStyle}">
 <Window.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="Style/Global.xaml" />
            <ResourceDictionary Source="Style/Controls.xaml" />
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
  </Window.Resources>
        <Grid>

   </Grid>
 </Window>

Hope this helps... there is no better solution from what I can see.