Global Style not working in WPF

Question

Why ist this Style not working in WPF? The TextBlock should be red, but it is not. It stays black. This is just happing when the TextBlock is in a Template.

<Window x:Class="WpfApplication2.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <Style TargetType="TextBlock">
            <Setter Property="Foreground" Value="Red"></Setter>
        </Style>
    </Window.Resources>
    <Grid>
        <ListView>
            <ListView.Items>
                <ListItem></ListItem>
            </ListView.Items>
            <ListView.ItemTemplate>
                <DataTemplate>
                    <TextBlock>Hallo</TextBlock>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>

    </Grid>
</Window>

Seems to be a bug: [SO-Answer](http://stackoverflow.com/a/2479695/3411327). — user3411327, Mar 27 '14 at 15:53

score 8 · Accepted Answer · answered Mar 27 '14 at 16:00

Implicit Styles in templates are limited to controls that inherit from System.Windows.Controls.Control unless they are defined in Application.Resources so either give your style x:Key and use it explicitly:

<Window.Resources>
    <Style TargetType="TextBlock" x:Key="myTextBlockStyle">
        <Setter Property="Foreground" Value="Red"></Setter>
    </Style>
</Window.Resources>

<TextBlock Style="{StaticResource myTextBlockStyle}">Hallo</TextBlock>

or move it to Application.Resources

<Application.Resources>
    <Style TargetType="TextBlock">
        <Setter Property="Foreground" Value="Red"></Setter>
    </Style>
</Application.Resources>

score -1 · Answer 2 · answered Mar 27 '14 at 16:07

If you want to define a style and have it automatically apply to all controls of that type (without manually specifying the style for each control) you need to define it like this instead.

E.G.

<Style x:Key="{x:Type TextBox}" TargetType="TextBox">
        <Setter Property="IsUndoEnabled" Value="True"></Setter>
        <Setter Property="UndoLimit" Value="10"></Setter>
        <Setter Property="ContextMenu" Value="{StaticResource textContextMenu}"></Setter>
        <Setter Property="SpellCheck.IsEnabled" Value="True"></Setter>
    </Style>

Global Style not working in WPF

2 Answers2

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