I'm having difficulties overriding a very simple TextBox style using the MaterialDesignInXamlToolkit.
As far as I can see I've followed the override instructions to the letter:
App.xaml
<Application x:Class="WpfApp1.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
StartupUri="MainWindow.xaml">
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Light.xaml" />
<ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml" />
<ResourceDictionary Source="Themes/MaterialDesignTheme.Overrides.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
</Application>
MainWindow.xaml
<Window x:Class="WpfApp1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:materialDesign="clr-namespace:MaterialDesignThemes.Wpf;assembly=MaterialDesignThemes.Wpf"
Title="MainWindow" Height="400" Width="300">
<Grid>
<TextBox VerticalAlignment="Center"
x:Name="NameTextBox"
materialDesign:HintAssist.Hint="Name">
</TextBox>
</Grid>
</Window>
MaterialDesignTheme.Overrides.xaml
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:materialDesign="clr-namespace:MaterialDesignThemes.Wpf;assembly=MaterialDesignThemes.Wpf">
<Style x:Key="MaterialDesignTextBox"
BasedOn="{StaticResource MaterialDesignTextBox}"
TargetType="{x:Type TextBox}">
<Setter Property="FontSize" Value="200" />
</Style>
</ResourceDictionary>
However, unless I remove the x:Key
from the style in the overrides file, the font in the text box stays at a very boring 12, rather than the super exciting 200 I'm after.
I've created an example project on Github here. If anyone could take a look I'd be very grateful.
The issue is in MaterialDesignTheme.Overrides.xaml. You are specifying a specific style to override but not referencing the resource dictionary that contains that style. Merging it in will fix the problem.
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.TextBox.xaml" />
</ResourceDictionary.MergedDictionaries>
<Style BasedOn="{StaticResource MaterialDesignTextBox}"
TargetType="{x:Type TextBox}">
<Setter Property="FontSize" Value="200" />
</Style>
</ResourceDictionary>