WPF UserControl Style

I want to set the background property of all the usercontrols of my project.

I tried with

<style TargetType={x:Type UserControl}>
    <setter property="Background" Value="Red" />
</style>

It compiles but didn't work.

¿Any Idea? Thanks!

From stackoverflow

• I think you're missing some double quotes:

  Try this:

  <Window.Resources>
      <Style TargetType="{x:Type UserControl}">
          <Setter Property="Background" Value="Red" />
      </Style>
  </Window.Resources>
  <Grid>
      <UserControl Name="control" Content="content"></UserControl>
  </Grid>
  

• oh... sorry, i've the doble quotes in my code. I Wrote this too quickly.

  I still have the problem... :(

• You can only set a a style to a specific class, so this will work (create a UserControl object, not very useful):

  <Window.Resources>
      <Style TargetType="{x:Type UserControl}">
          <Setter Property="Background" Value="Red" />
      </Style>
  </Window.Resources>
  <Grid>
      <UserControl Name="control" Content="content"></UserControl>
  </Grid>
  

  But this doesn't (Create a class derived from UserControl):

  <Window.Resources>
      <Style TargetType="{x:Type UserControl}">
          <Setter Property="Background" Value="Red" />
      </Style>
  </Window.Resources>
  <Grid>
      <l:MyUserControl Name="control" Content="content"></l:MyUserControl>
  </Grid>
  

  What you can do is either explicitly set the style using the Style property:

  <Window.Resources>
      <Style TargetType="{x:Type UserControl}" x:Key="UCStyle">
          <Setter Property="Background" Value="Red" />
      </Style>
  </Window.Resources>
  <Grid>
      <l:MyUserControl Name="control" Content="content" Style="{StaticResource UCStyle}"></l:MyUserControl>
  </Grid>
  

  or create a style for each derived class, you can use BasedOn to avoid duplicating the style content:

  <Window.Resources>
      <Style TargetType="{x:Type UserControl}" x:Key="UCStyle">
          <Setter Property="Background" Value="Red" />
      </Style>
      <Style TargetType="{x:Type l:MyUserControl}" BasedOn="{StaticResource UCStyle}" />
  </Window.Resources>
  <Grid>
      <l:MyUserControl Name="control" Content="content"></l:MyUserControl>
  </Grid>
  

  Greg D : These are the two options that exist for styling in WPF.

• Nir: Thanks!! It was a very complete answer!!!

  As a workarround, I created an usercontrol class, and apply the style in the code-behind constructor. Now all my usercontrols inherit from this class. It Works, but I don't consider it elegant, I prefer don't mix code-behind and presentation.