Global Style Not Working

Question

I have the following styles defined in my MainWindow.Resources:

<Style TargetType="{x:Type ComboBox}"> <Setter Property="Height" Value="26"/> <Setter Property="ItemTemplate"> <Setter.Value> <DataTemplate> <TextBlock Text="{Binding}"/> </DataTemplate> </Setter.Value> </Setter> <Setter Property="VerticalContentAlignment" Value="Center"/> <Setter Property="Width" Value="358"/> </Style> <Style TargetType="{x:Type TextBlock}"> <Setter Property="MaxWidth" Value="350"/> <Setter Property="TextTrimming" Value="CharacterEllipsis"/> <Setter Property="VerticalAlignment" Value="Center"/> </Style>

The TextBlock style is working for TextBlock elements defined inside my MainWindow, but it's not working for the TextBlock used as DataTemplate for my ComboBoxes. Why?

If I set the TextBlock properties inside the element itself, everything works fine:

<Style TargetType="{x:Type ComboBox}"> <Setter Property="Height" Value="26"/> <Setter Property="ItemTemplate"> <Setter.Value> <DataTemplate> <TextBlock MaxWidth="350" Text="{Binding}" TextTrimming="CharacterEllipsis" VerticalAlignment="Center"/> </DataTemplate> </Setter.Value> </Setter> <Setter Property="VerticalContentAlignment" Value="Center"/> <Setter Property="Width" Value="358"/> </Style>

brunnerh · Accepted Answer · 2013-05-05 16:34:15Z

Templates have a different scope of sorts, you can move the style to the Application.Resources which apply even within data and control templates across the whole application.

Shafqat Masood · Accepted Answer · 2013-05-05 16:33:49Z

use dynamic resource

 <DataTemplate DataType="{x:Type local:DataSource}"> <TextBox Style="{DynamicResource TextBoxStyle}" Text="{Binding}" /> </DataTemplate> <ComboBox> <ComboBox.Resources> <Style x:Key="TextBoxStyle" BasedOn="{StaticResource {x:Type ListBoxItem}}" TargetType="TextBox"> </Style> </ComboBox.Resources> </ComboBox>

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