WPF: add Combobox into GridViewColumn Header - wpf

Question

So inside ListView.View i have this Style than i am using in order to remove Header borders:
<GridView ColumnHeaderContainerStyle="{StaticResource ListViewHeaderDefaultStyle}">
</GridView>
Style
<Style x:Key="ListViewHeaderDefaultStyle" TargetType="{x:Type GridViewColumnHeader}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type GridViewColumnHeader}">
<Border BorderThickness="0,0,0,1" BorderBrush="{DynamicResource GridViewColumnHeaderBorderBrushColor}" Background="Transparent">
<TextBlock x:Name="ContentHeader"
Text="{TemplateBinding Content}"
Padding="0,5,0,0"
Width="{TemplateBinding Width}"
TextAlignment="Left"
FontSize="13"
Margin="5,0,0,0"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="OverridesDefaultStyle" Value="True"/>
<Setter Property="Foreground" Value="{DynamicResource GridViewColumnHeaderForegroundColor}"/>
<Setter Property="FontFamily" Value="{DynamicResource applicationFontFamily}"/>
<Setter Property="FontSize" Value="{DynamicResource GridViewColumnHeaderFontSize}"/>
</Style>
And inside my Column Header i want to add Combobox:
<GridViewColumn Width="100" CellTemplate="{StaticResource ComboBoxDataTemplate}">
<GridViewColumn.Header>
<StackPanel>
<ComboBox Width="90"
SelectedIndex="0"
SelectionChanged="ComboBox_SelectionChanged"
Margin="0,0,0,0">
<ComboBoxItem Content=" -- Select --"/>
<ComboBoxItem Content="File"/>
<ComboBoxItem Content="Name"/>
</ComboBox>
</StackPanel>
</GridViewColumn.Header>
But because my Style that i am using contains TextBlock i cannot see this Combobox.
If i removed the Style ListViewHeaderDefaultStyle this works fine but then all my Header borders that i want to remove visible again.
How can i use this style and also display my Header Combobox ?

Answer 1

try this style
<Style x:Key="ListViewHeaderDefaultStyle" TargetType="{x:Type GridViewColumnHeader}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type GridViewColumnHeader}">
<Border BorderThickness="0,0,0,1" BorderBrush="{DynamicResource GridViewColumnHeaderBorderBrushColor}" Background="Transparent">
<Grid>
<TextBlock x:Name="ContentHeader"
Text="{TemplateBinding Content}"
Padding="0,5,0,0"
Width="{TemplateBinding Width}"
TextAlignment="Left"
FontSize="13"
Margin="5,0,0,0">
<TextBlock.Style>
<Style TargetType="TextBlock">
<Setter Property="Visibility" Value="Visible"/>
<Style.Triggers>
<DataTrigger Binding="{Binding ContentPresenter}" Value="{x:Null}">
<Setter Property="Visibility" Value="Collapsed"/>
</DataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
<ContentPresenter HorizontalAlignment="Left" VerticalAlignment="Center"/>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="OverridesDefaultStyle" Value="True"/>
<Setter Property="Foreground" Value="{DynamicResource GridViewColumnHeaderForegroundColor}"/>
<Setter Property="FontFamily" Value="{DynamicResource applicationFontFamily}"/>
<Setter Property="FontSize" Value="{DynamicResource GridViewColumnHeaderFontSize}"/>
</Style>