WPF Scrollbar XAML Template dont show Headers - wpf

Question

I need help with my own listview scrollbarTemplate. I try to apply my own template but when I use it in my listviews I cant see the Headers.
I guess this happens due to overidden template definitions(?) but I'm not sure.
Do I have to define an own template for the header?
Template so far:
<Style x:Key="ListViewScrollViewStyle" TargetType="{x:Type ListView}">
<Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/>
<Setter Property="BorderThickness" Value="2"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.CanContentScroll" Value="true"/>
<Setter Property="ScrollViewer.PanningMode" Value="Both"/>
<Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListView}">
<Grid>
<Rectangle Fill="Transparent"/>
<Border x:Name="BorderControlTemplate" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="1" SnapsToDevicePixels="true">
<ScrollViewer Focusable="false" Padding="{TemplateBinding Padding}" Template="{DynamicResource ScrollViewerControlTemplate1}">
<ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</ScrollViewer>
</Border>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Background" TargetName="BorderControlTemplate" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
</Trigger>
<Trigger Property="IsGrouping" Value="true">
<Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<ControlTemplate x:Key="ScrollViewerControlTemplate1" TargetType="{x:Type ScrollViewer}">
<Grid x:Name="Grid" Background="{TemplateBinding Background}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<ScrollContentPresenter x:Name="PART_ScrollContentPresenter" CanContentScroll="{TemplateBinding CanContentScroll}"
CanHorizontallyScroll="False" CanVerticallyScroll="False" ContentTemplate="{TemplateBinding ContentTemplate}"
Content="{TemplateBinding Content}" Grid.Column="0" Margin="{TemplateBinding Padding}" />
<ScrollBar x:Name="PART_VerticalScrollBar" AutomationProperties.AutomationId="VerticalScrollBar"
Cursor="Arrow" Grid.Column="1" Maximum="{TemplateBinding ScrollableHeight}"
Minimum="0" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}"
Value="{Binding VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}"
ViewportSize="NaN" Style="{DynamicResource ScrollBarStyle1}"/>
</Grid>
</ControlTemplate>
<LinearGradientBrush x:Key="VerticalScrollBarBackground" EndPoint="1,0" StartPoint="0,0">
<GradientStop Color="#EE7F00" Offset="0"/>
</LinearGradientBrush>
<SolidColorBrush x:Key="ScrollBarDisabledBackground" Color="Gray"/>
<Style x:Key="ScrollBarThumb" TargetType="{x:Type Thumb}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Thumb}">
<Rectangle Width="10" Height="50" Fill="#EE7F00">
<Rectangle.Effect>
<DropShadowEffect ShadowDepth="0" BlurRadius="50" Color="Transparent" />
</Rectangle.Effect>
</Rectangle>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<LinearGradientBrush x:Key="HorizontalScrollBarBackground" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#EE7F00" Offset="0"/>
</LinearGradientBrush>
<Style x:Key="ScrollBarStyle1" TargetType="{x:Type ScrollBar}">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Stylus.IsPressAndHoldEnabled" Value="false"/>
<Setter Property="Stylus.IsFlicksEnabled" Value="false"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="Width" Value="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"/>
<Setter Property="MinWidth" Value="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ScrollBar}">
<Grid x:Name="Bg" Background="{TemplateBinding Background}" SnapsToDevicePixels="true">
<Border Width="1" Background="#EE7F00" HorizontalAlignment="Center"/>
<Track x:Name="PART_Track" IsDirectionReversed="true" IsEnabled="{TemplateBinding IsMouseOver}">
<Track.Thumb>
<Thumb Style="{StaticResource ScrollBarThumb}" Microsoft_Windows_Themes:ScrollChrome.ScrollGlyph="VerticalGripper"/>
</Track.Thumb>
</Track>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Background" TargetName="Bg" Value="{StaticResource ScrollBarDisabledBackground}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="Orientation" Value="Horizontal">
<Setter Property="Width" Value="Auto"/>
<Setter Property="MinWidth" Value="0"/>
<Setter Property="Height" Value="{DynamicResource {x:Static SystemParameters.HorizontalScrollBarHeightKey}}"/>
<Setter Property="MinHeight" Value="{DynamicResource {x:Static SystemParameters.HorizontalScrollBarHeightKey}}"/>
<Setter Property="Background" Value="{StaticResource HorizontalScrollBarBackground}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ScrollBar}">
<Grid x:Name="Bg" Background="{TemplateBinding Background}" SnapsToDevicePixels="true">
<Grid.ColumnDefinitions>
<ColumnDefinition MaxWidth="{DynamicResource {x:Static SystemParameters.HorizontalScrollBarButtonWidthKey}}"/>
<ColumnDefinition Width="0.00001*"/>
<ColumnDefinition MaxWidth="{DynamicResource {x:Static SystemParameters.HorizontalScrollBarButtonWidthKey}}"/>
</Grid.ColumnDefinitions>
<Track x:Name="PART_Track" Grid.Column="1" IsEnabled="{TemplateBinding IsMouseOver}">
<Track.Thumb>
<Thumb Style="{StaticResource ScrollBarThumb}" Microsoft_Windows_Themes:ScrollChrome.ScrollGlyph="HorizontalGripper"/>
</Track.Thumb>
</Track>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Background" TargetName="Bg" Value="{StaticResource ScrollBarDisabledBackground}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
Style which is bound on my listview:
<ListView x:Name="myListView" Grid.Column="0" BorderThickness="0" ItemContainerStyle="{StaticResource ItemInformationTemplate}" HorizontalAlignment="Stretch" Style={StaticResource ListViewScrollViewStyle}
ItemsSource="{Binding ElementName=preView, Path=SelectedItem.Item}" Height="Auto" Width="399"
FontFamily="Segoe UI">
<ListView.View>
<GridView>
<GridViewColumn x:Name="SampleHeader" Width="399" Header="Beispiel Header" DisplayMemberBinding="{Binding}" HeaderContainerStyle="{StaticResource StandardGridViewHeaderStyle}"/>
</GridView>
</ListView.View>
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel></StackPanel>
</ItemsPanelTemplate>
</ListView.ItemsPanel>
<ListView.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding UsedItem.Number}" HorizontalAlignment="Center" TextAlignment="Center"/>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
How can I change the code so the Headers will be displayed properly?

Answer 1

You need to modify your ScrollViewer's ContentTemplate to include a GridViewHeaderRowPresenter. Something like this:
<ControlTemplate x:Key="ScrollViewerControlTemplate1" TargetType="{x:Type ScrollViewer}">
<Grid x:Name="Grid" Background="{TemplateBinding Background}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<DockPanel Margin="{TemplateBinding Padding}">
<ScrollViewer DockPanel.Dock="Top" Focusable="false" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden">
<GridViewHeaderRowPresenter AllowsColumnReorder="{Binding TemplatedParent.View.AllowsColumnReorder, RelativeSource={RelativeSource TemplatedParent}}" ColumnHeaderContainerStyle="{Binding TemplatedParent.View.ColumnHeaderContainerStyle, RelativeSource={RelativeSource TemplatedParent}}" ColumnHeaderToolTip="{Binding TemplatedParent.View.ColumnHeaderToolTip, RelativeSource={RelativeSource TemplatedParent}}" ColumnHeaderStringFormat="{Binding TemplatedParent.View.ColumnHeaderStringFormat, RelativeSource={RelativeSource TemplatedParent}}" ColumnHeaderContextMenu="{Binding TemplatedParent.View.ColumnHeaderContextMenu, RelativeSource={RelativeSource TemplatedParent}}" ColumnHeaderTemplate="{Binding TemplatedParent.View.ColumnHeaderTemplate, RelativeSource={RelativeSource TemplatedParent}}" Columns="{Binding TemplatedParent.View.Columns, RelativeSource={RelativeSource TemplatedParent}}" ColumnHeaderTemplateSelector="{Binding TemplatedParent.View.ColumnHeaderTemplateSelector, RelativeSource={RelativeSource TemplatedParent}}" Margin="2,0,2,0" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</ScrollViewer>
<ScrollContentPresenter x:Name="PART_ScrollContentPresenter" CanContentScroll="{TemplateBinding CanContentScroll}"
CanHorizontallyScroll="False" CanVerticallyScroll="False" ContentTemplate="{TemplateBinding ContentTemplate}"
Content="{TemplateBinding Content}" Grid.Column="0" Margin="{TemplateBinding Padding}" />
</DockPanel>
<ScrollBar x:Name="PART_VerticalScrollBar" AutomationProperties.AutomationId="VerticalScrollBar"
Cursor="Arrow" Grid.Column="1" Maximum="{TemplateBinding ScrollableHeight}"
Minimum="0" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}"
Value="{Binding VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}"
ViewportSize="NaN" Style="{DynamicResource ScrollBarStyle1}"/>
</Grid>
</ControlTemplate>
Yes, I'm probably as surprised as you to find a ScrollViewer inside the ControlTemplate of a ScrollViewer, but hey, blame Microsoft :P I just extracted the default template with Blend, to see what you were missing.
To customize the looks of the header, use the HeaderContainerStyle of the GridViewColumn:
<ListView.View>
<GridView>
<GridViewColumn x:Name="SampleHeader" Width="399" Header="Beispiel Header" DisplayMemberBinding="{Binding}" HeaderContainerStyle="{StaticResource StandardGridViewHeaderStyle}">
<GridViewColumn.HeaderContainerStyle>
<Style TargetType="{x:Type GridViewColumnHeader}">
<Setter Property="Background" Value="Transparent" />
<!-- -->
</Style>
</GridViewColumn.HeaderContainerStyle>
</GridViewColumn>
</GridView>
</ListView.View>