How to change FontFamily for Textbox while defined in Window

Question

I have an issue with defining FontFamily to my textboxes applicationwide, because my font family is defined at window level with this style :

<Style TargetType="Window" >
    <Setter Property="FontFamily" Value="Lucida Sans Unicode"/>
    <Setter Property="FontSize" Value="10pt"/>
</Style>

I have defined the font-family for my textboxes this way :

<Style TargetType="{x:Type TextBox}">
    <Setter Property="FontFamily" Value="Arial"/>
    <Setter Property="FontSize" Value="10pt"/>
</Style>

However, my TextBox style is not applied, and the text into the textboxes is still Lucida, and not Arial. How can I do that ? Is there a css-like !important equivalent in XAML style to override previous one ?

I notice that I really appreciate a XAML way to perform it on ResourceDictionaries.

Thanks for answers

This turns out to be kind of interesting. Can you confirm that you're setting those Styles in App.xaml, rather than in each Window? — goobering, Jun 26 '15 at 10:33
Neither in App.xaml and Window, I defined them into a ResourceDictionary that is dynamcally loaded at runtime — cdie, Jun 26 '15 at 10:38
It looks a lot like there's something weird (that I don't entirely understand) going on with Window/Control level settings for the entire application. See Gishu's answer here: http://stackoverflow.com/questions/431940/how-to-set-default-wpf-window-style-in-app-xaml , and Nicolas's here: http://stackoverflow.com/questions/4279773/wpf-window-style-not-being-applied . — goobering, Jun 26 '15 at 10:48

score -1 · Answer 1 · answered Jun 26 '15 at 09:52

It is working for me. I defined two styles, one for window, one special for text box. Special style wins and result is Arial 30pt. If I comment special style then window style is applied for textBox and comic sans 20pt appear.

See code:

<Window x:Class="WpfApplication3.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WpfApplication3"
        Title="MainWindow" Height="350" Width="525">
  <Grid>
    <TextBox Text="Hello!"/>
  </Grid>
</Window>

Application resources:

<Application x:Class="WpfApplication3.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
    <Style TargetType="Window" >
      <Setter Property="FontFamily" Value="Comic Sans MS"/>
      <Setter Property="FontSize" Value="20pt"/>
    </Style>
    <Style TargetType="{x:Type TextBox}">
      <Setter Property="FontFamily" Value="Arial"/>
      <Setter Property="FontSize" Value="30pt"/>
    </Style>
  </Application.Resources>
</Application>

This looked entirely sensible to me until I tried to run it. I get the right result in design mode, but not during debugging. — goobering, Jun 26 '15 at 10:04
In fact, defining the style with the key make the solution works, so I'll do that just because all my window inheritates of one — cdie, Jun 26 '15 at 10:52

How to change FontFamily for Textbox while defined in Window

1 Answers1