Data Grid XAML Styling

gistfile1.txt

<!--  Style and template for the button in the upper left corner of the DataGrid.  -->
    <Style x:Key="{ComponentResourceKey ResourceId=DataGridSelectAllButtonStyle, TypeInTargetAssembly={x:Type DataGrid}}" TargetType="{x:Type Button}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Button}">
                    <Grid>
                        <Rectangle
                            x:Name="Border"
                            Fill="{DynamicResource ControlDefaultBackgroundBrush}"
                            SnapsToDevicePixels="True"
                            Stroke="{DynamicResource ControlBrightBorderBrush}" />
                        <Polygon
                            x:Name="Arrow"
                            Margin="8,8,3,3"
                            HorizontalAlignment="Right"
                            VerticalAlignment="Bottom"
                            Fill="{DynamicResource ControlGlythBrush}"
                            Opacity="0.15"
                            Points="0,10 10,10 10,0"
                            Stretch="Uniform" />
                        <VisualStateManager.VisualStateGroups>
                            <VisualStateGroup x:Name="CommonStates">
                                <VisualState x:Name="Normal" />
                                <VisualState x:Name="MouseOver">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="Border" Storyboard.TargetProperty="(Shape.Fill)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{DynamicResource ControlMouseOverBackgroundBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Pressed">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="Border" Storyboard.TargetProperty="(Shape.Fill)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{DynamicResource ControlSelectedBackgroundBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Disabled">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="Arrow" Storyboard.TargetProperty="(UIElement.Visibility)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Collapsed}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>
                        </VisualStateManager.VisualStateGroups>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--  Style and template for the DataGrid.  -->
    <Style TargetType="{x:Type DataGrid}">
        <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" />
        <Setter Property="BorderBrush" Value="Transparent" />
        <Setter Property="OverridesDefaultStyle" Value="true" />
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="RowDetailsVisibilityMode" Value="VisibleWhenSelected" />
        <Setter Property="ScrollViewer.CanContentScroll" Value="true" />
        <Setter Property="ScrollViewer.PanningMode" Value="Both" />
        <Setter Property="Stylus.IsFlicksEnabled" Value="False" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type DataGrid}">
                    <Border
                        x:Name="border"
                        Padding="{TemplateBinding Padding}"
                        Background="Transparent"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        SnapsToDevicePixels="True">
                        <ScrollViewer
                            x:Name="DG_ScrollViewer"
                            Background="Transparent"
                            Focusable="false">
                            <ScrollViewer.Template>
                                <ControlTemplate TargetType="{x:Type ScrollViewer}">
                                    <Grid>
                                        <Grid.ColumnDefinitions>
                                            <ColumnDefinition Width="Auto" />
                                            <ColumnDefinition Width="*" />
                                            <ColumnDefinition Width="Auto" />
                                        </Grid.ColumnDefinitions>
                                        <Grid.RowDefinitions>
                                            <RowDefinition Height="Auto" />
                                            <RowDefinition Height="*" />
                                            <RowDefinition Height="Auto" />
                                        </Grid.RowDefinitions>

                                        <Button
                                            Width="{Binding CellsPanelHorizontalOffset, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"
                                            Command="{x:Static DataGrid.SelectAllCommand}"
                                            Focusable="false"
                                            Style="{StaticResource {ComponentResourceKey ResourceId=DataGridSelectAllButtonStyle,
                                                                                          TypeInTargetAssembly={x:Type DataGrid}}}"
                                            Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.All}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />

                                        <DataGridColumnHeadersPresenter
                                            x:Name="PART_ColumnHeadersPresenter"
                                            Grid.Column="1"
                                            Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.Column}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />

                                        <ScrollContentPresenter
                                            x:Name="PART_ScrollContentPresenter"
                                            Grid.Row="1"
                                            Grid.ColumnSpan="2"
                                            CanContentScroll="{TemplateBinding CanContentScroll}" />

                                        <ScrollBar
                                            x:Name="PART_VerticalScrollBar"
                                            Grid.Row="1"
                                            Grid.Column="2"
                                            Maximum="{TemplateBinding ScrollableHeight}"
                                            Orientation="Vertical"
                                            ViewportSize="{TemplateBinding ViewportHeight}"
                                            Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}"
                                            Value="{Binding VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" />

                                        <Grid Grid.Row="2" Grid.Column="1">
                                            <Grid.ColumnDefinitions>
                                                <ColumnDefinition Width="{Binding NonFrozenColumnsViewportHorizontalOffset, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />
                                                <ColumnDefinition Width="*" />
                                            </Grid.ColumnDefinitions>

                                            <ScrollBar
                                                x:Name="PART_HorizontalScrollBar"
                                                Grid.Column="1"
                                                Maximum="{TemplateBinding ScrollableWidth}"
                                                Orientation="Horizontal"
                                                ViewportSize="{TemplateBinding ViewportWidth}"
                                                Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}"
                                                Value="{Binding HorizontalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" />
                                        </Grid>
                                    </Grid>
                                </ControlTemplate>
                            </ScrollViewer.Template>
                            <ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                        </ScrollViewer>
                        <VisualStateManager.VisualStateGroups>
                            <VisualStateGroup x:Name="CommonStates">
                                <VisualState x:Name="Disabled">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="border" Storyboard.TargetProperty="(Panel.Background)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{DynamicResource ControlDefaultBackgroundBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Normal" />
                            </VisualStateGroup>
                        </VisualStateManager.VisualStateGroups>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Style.Triggers>
            <Trigger Property="IsGrouping" Value="true">
                <Setter Property="ScrollViewer.CanContentScroll" Value="false" />
            </Trigger>
        </Style.Triggers>
    </Style>

    <!--  Style and template for the DataGridCell.  -->
    <Style TargetType="{x:Type DataGridCell}">
        <Setter Property="OverridesDefaultStyle" Value="true" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type DataGridCell}">
                    <Border
                        x:Name="border"
                        Background="Transparent"
                        BorderBrush="Transparent"
                        BorderThickness="1"
                        SnapsToDevicePixels="True">
                        <ContentPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                        <VisualStateManager.VisualStateGroups>
                            <VisualStateGroup x:Name="FocusStates">
                                <VisualState x:Name="Unfocused" />
                                <VisualState x:Name="Focused" />
                            </VisualStateGroup>
                            <VisualStateGroup x:Name="CurrentStates">
                                <VisualState x:Name="Regular" />
                                <VisualState x:Name="Current">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="border" Storyboard.TargetProperty="(Border.BorderBrush)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{DynamicResource ContainerBorderBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>
                        </VisualStateManager.VisualStateGroups>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--  Style and template for the DataGridRow.  -->
    <Style TargetType="{x:Type DataGridRow}">
        <Setter Property="OverridesDefaultStyle" Value="true" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="SnapsToDevicePixels" Value="true" />
        <Setter Property="Validation.ErrorTemplate" Value="{x:Null}" />
        <Setter Property="ValidationErrorTemplate">
            <Setter.Value>
                <ControlTemplate>
                    <TextBlock
                        Margin="2,0,0,0"
                        VerticalAlignment="Center"
                        Foreground="Red"
                        Text="!" />
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type DataGridRow}">
                    <Border
                        x:Name="DGR_Border"
                        Background="Transparent"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        SnapsToDevicePixels="True">
                        <SelectiveScrollingGrid>
                            <SelectiveScrollingGrid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto" />
                                <ColumnDefinition Width="*" />
                            </SelectiveScrollingGrid.ColumnDefinitions>
                            <SelectiveScrollingGrid.RowDefinitions>
                                <RowDefinition Height="*" />
                                <RowDefinition Height="Auto" />
                            </SelectiveScrollingGrid.RowDefinitions>
                            <DataGridCellsPresenter
                                Grid.Column="1"
                                ItemsPanel="{TemplateBinding ItemsPanel}"
                                SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                            <DataGridDetailsPresenter
                                Grid.Row="1"
                                Grid.Column="1"
                                SelectiveScrollingGrid.SelectiveScrollingOrientation="{Binding AreRowDetailsFrozen, ConverterParameter={x:Static SelectiveScrollingOrientation.Vertical}, Converter={x:Static DataGrid.RowDetailsScrollingConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"
                                Visibility="{TemplateBinding DetailsVisibility}" />
                            <DataGridRowHeader
                                Grid.RowSpan="2"
                                SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical"
                                Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.Row}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />
                        </SelectiveScrollingGrid>
                        <VisualStateManager.VisualStateGroups>
                            <VisualStateGroup x:Name="CommonStates">
                                <VisualState x:Name="Normal" />

                                <!--  Provide a different appearance for every other row.  -->
                                <VisualState x:Name="Normal_AlternatingRow">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DGR_Border" Storyboard.TargetProperty="(Panel.Background)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{DynamicResource ControlDefaultBackgroundBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>

                                <!--
                                    In this example, a row in Editing or selected mode has an
                                    identical appearances. In other words, the states
                                    Normal_Selected, Unfocused_Selected, Normal_Editing,
                                    MouseOver_Editing, MouseOver_Unfocused_Editing,
                                    and Unfocused_Editing are identical.
                                -->
                                <VisualState x:Name="Normal_Selected">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DGR_Border" Storyboard.TargetProperty="(Panel.Background)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{DynamicResource ControlDefaultBackgroundBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>

                                <VisualState x:Name="Unfocused_Selected">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DGR_Border" Storyboard.TargetProperty="(Panel.Background)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{DynamicResource ControlDefaultBackgroundBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>

                                <VisualState x:Name="Normal_Editing">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DGR_Border" Storyboard.TargetProperty="(Panel.Background)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{DynamicResource ControlDefaultBackgroundBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>

                                <VisualState x:Name="MouseOver_Editing">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DGR_Border" Storyboard.TargetProperty="(Panel.Background)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{DynamicResource ControlDefaultBackgroundBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>

                                <VisualState x:Name="MouseOver_Unfocused_Editing">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DGR_Border" Storyboard.TargetProperty="(Panel.Background)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{DynamicResource ControlDefaultBackgroundBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>

                                <VisualState x:Name="Unfocused_Editing">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DGR_Border" Storyboard.TargetProperty="(Panel.Background)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{DynamicResource ControlDefaultBackgroundBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>

                                <VisualState x:Name="MouseOver">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DGR_Border" Storyboard.TargetProperty="(Panel.Background)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{DynamicResource ControlMouseOverBackgroundBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>

                                <!--
                                    In this example, the appearance of a selected row
                                    that has the mouse over it is the same regardless of
                                    whether the row is selected.  In other words, the states
                                    MouseOver_Editing and MouseOver_Unfocused_Editing are identical.
                                -->
                                <VisualState x:Name="MouseOver_Selected">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DGR_Border" Storyboard.TargetProperty="(Panel.Background)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{DynamicResource ControlMouseOverBackgroundBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>

                                <VisualState x:Name="MouseOver_Unfocused_Selected">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DGR_Border" Storyboard.TargetProperty="(Panel.Background)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{DynamicResource ControlMouseOverBackgroundBrush}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>
                        </VisualStateManager.VisualStateGroups>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--  Style and template for the resize control on the DataGridRowHeader.  -->
    <Style x:Key="RowHeaderGripperStyle" TargetType="{x:Type Thumb}">
        <Setter Property="Height" Value="8" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="Cursor" Value="SizeNS" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Thumb}">
                    <Border Padding="{TemplateBinding Padding}" Background="{TemplateBinding Background}" />
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--  Style and template for the DataGridRowHeader.  -->
    <Style TargetType="{x:Type DataGridRowHeader}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type DataGridRowHeader}">
                    <Grid>
                        <Border
                            x:Name="rowHeaderBorder"
                            Width="10"
                            Background="{DynamicResource ControlDefaultBackgroundBrush}"
                            BorderBrush="{DynamicResource ControlBrightBorderBrush}"
                            BorderThickness="1">
                            <StackPanel Orientation="Horizontal">
                                <ContentPresenter VerticalAlignment="Center" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                                <Control
                                    SnapsToDevicePixels="false"
                                    Template="{Binding ValidationErrorTemplate, RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}}}"
                                    Visibility="{Binding (Validation.HasError), Converter={StaticResource bool2VisibilityConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}}}" />
                            </StackPanel>
                        </Border>

                        <Thumb
                            x:Name="PART_TopHeaderGripper"
                            VerticalAlignment="Top"
                            Style="{StaticResource RowHeaderGripperStyle}" />
                        <Thumb
                            x:Name="PART_BottomHeaderGripper"
                            VerticalAlignment="Bottom"
                            Style="{StaticResource RowHeaderGripperStyle}" />
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--  Style and template for the resize control on the DataGridColumnHeader.  -->
    <Style x:Key="ColumnHeaderGripperStyle" TargetType="{x:Type Thumb}">
        <Setter Property="Width" Value="8" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="Cursor" Value="SizeWE" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Thumb}">
                    <Border Padding="{TemplateBinding Padding}" Background="{TemplateBinding Background}" />
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--  Style and template for the DataGridColumnHeader.  -->
    <Style TargetType="{x:Type DataGridColumnHeader}">
        <Setter Property="OverridesDefaultStyle" Value="true" />
        <Setter Property="SnapsToDevicePixels" Value="True" />
        <Setter Property="VerticalContentAlignment" Value="Center" />
        <Setter Property="Background" Value="{DynamicResource ControlLightBackgroundBrush}" />
        <Setter Property="BorderBrush" Value="{DynamicResource ControlDefaultBorderBrush}" />
        <Setter Property="Foreground" Value="{DynamicResource ControlDefaultForegroundBrush}" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type DataGridColumnHeader}">
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="*" />
                            <ColumnDefinition Width="Auto" />
                        </Grid.ColumnDefinitions>
                        <Border
                            x:Name="BackgroundBorder"
                            Grid.ColumnSpan="2"
                            Background="{TemplateBinding Background}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="1,1,1,1" />
                        <ContentPresenter
                            Grid.Column="0"
                            Margin="6,3,6,3"
                            HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                            VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                            SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                        <Path
                            x:Name="SortArrow"
                            Grid.Column="1"
                            Width="8"
                            Height="6"
                            Margin="2,0,5,0"
                            HorizontalAlignment="Right"
                            VerticalAlignment="Center"
                            Data="M0,0 L1,0 0.5,1 z"
                            Fill="{DynamicResource ControlDefaultForegroundBrush}"
                            Opacity="0.5"
                            RenderTransformOrigin="0.5,0.4"
                            Stretch="Fill"
                            Visibility="Collapsed" />
                        <Thumb
                            x:Name="PART_LeftHeaderGripper"
                            HorizontalAlignment="Left"
                            Style="{StaticResource ColumnHeaderGripperStyle}" />
                        <Thumb
                            x:Name="PART_RightHeaderGripper"
                            HorizontalAlignment="Right"
                            Style="{StaticResource ColumnHeaderGripperStyle}" />
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="SortDirection" Value="Ascending">
                            <Setter TargetName="SortArrow" Property="Visibility" Value="Visible" />
                            <Setter TargetName="SortArrow" Property="RenderTransform">
                                <Setter.Value>
                                    <RotateTransform Angle="180" />
                                </Setter.Value>
                            </Setter>
                        </Trigger>
                        <Trigger Property="SortDirection" Value="Descending">
                            <Setter TargetName="SortArrow" Property="Visibility" Value="Visible" />
                        </Trigger>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter TargetName="BackgroundBorder" Property="Background" Value="{DynamicResource ControlMouseOverBackgroundBrush}" />
                            <Setter TargetName="BackgroundBorder" Property="BorderBrush" Value="{DynamicResource ControlMouseOverBorderBrush}" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--  Style and template for the DataGridColumnHeadersPresenter.  -->
    <Style TargetType="{x:Type DataGridColumnHeadersPresenter}">
        <Setter Property="OverridesDefaultStyle" Value="true" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type DataGridColumnHeadersPresenter}">
                    <Grid>
                        <DataGridColumnHeader x:Name="PART_FillerColumnHeader" IsHitTestVisible="False" />
                        <ItemsPresenter />
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

thats pretty cool. nice :)

Great, but when showing thousands of (virtual) rows, the grid seem to get very slow... but seems not only due to this styling... But when I disable the theming, it's extremely fast. I did not get why this is, yet.