WPF TextBox Style When Disabled - wpf

Question

I'm trying to create a simple TextBox style. I want to create a trigger to change the colors when the textbox is disabled:
<Style TargetType="{x:Type TextBox}">
<Setter Property="Background" Value="White"/>
<Setter Property="Foreground" Value="Black"/>
<Setter Property="FontSize" Value="{StaticResource NormalFontSize}"/>
<Setter Property="FontWeight" Value="Normal"/>
<Setter Property="FontStyle" Value="Normal"/>
<Setter Property="FontFamily" Value="{StaticResource FontFamilyName}"/>
<Setter Property="HorizontalAlignment" Value="Stretch"/>
<Setter Property="VerticalAlignment" Value="Center"/>
<Setter Property="TextAlignment" Value="Center"/>
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TextBox">
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Background" Value="{StaticResource listItemHighlightBackground}"/>
<Setter Property="Foreground" Value="{StaticResource disabledArrowBackground}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
When I use the trigger, the textbox disappears
What's wrong here?
Thanks

Answer 1

A ControlTemplate replaces the template for that control type. It looks like you're misunderstanding its usage. Before the triggers, try adding some visual objects to display, such as a border, and that will appear. Better yet, don't use a ControlTemplate at all...you only need to set a property trigger on the style, e.g:
<Style.Triggers>
<Trigger Property="IsEnabled" Value="false">
<Setter Property = "Foreground" Value="Green"/>
</Trigger>
</Style.Triggers>