How to apply the SeparatorBrush and SeparatorVisibility for HeaderCellControl in WPF DataGrid(SfDataGrid)?
This example illustrates how to apply the SeparatorBrush and SeparatorVisibility for HeaderCellControl in WPF DataGrid (SfDataGrid).
WPF DataGrid (SfDataGrid) doesn’t have any direct properties for change the SeparatorColor and SeparatorVisibility of column header. But you can achieve this by customizing the GridHeaderCellControl style.
You can change the column header separator color by change the GridSplitter background color in GridHeaderCellControl.
<syncfusion:BoolToVisiblityConverter x:Key="VisiblityConverter" />
<syncfusion:SortDirectionToVisibilityConverter x:Key="sortDirectionToVisibilityConverter" />
<syncfusion:SortDirectionToWidthConverter x:Key="sortDirectionToWidthConverter" />
<Style x:Key="headerStyleSeparatorColor" TargetType="{x:Type syncfusion:GridHeaderCellControl}">
<Setter Property="Background" Value="Transparent" />
<Setter Property="BorderBrush" Value="Gray" />
<Setter Property="BorderThickness" Value="0,0,0,1" />
<Setter Property="HorizontalContentAlignment" Value="Center" />
<Setter Property="Padding" Value="5,0,0,0" />
<Setter Property="Foreground" Value="Gray" />
<Setter Property="FontSize" Value="14" />
<Setter Property="FontWeight" Value="Normal" />
<Setter Property="IsTabStop" Value="False" />
<Setter Property="syncfusion:VisualContainer.WantsMouseInput" Value="True" />
<Setter Property="VerticalContentAlignment" Value="Center" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type syncfusion:GridHeaderCellControl}">
<Grid>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="HiddenColumnsResizingStates">
<VisualState x:Name="PreviousColumnHidden">
<Storyboard>
<ThicknessAnimationUsingKeyFrames BeginTime="0"
Duration="1"
Storyboard.TargetName="PART_HeaderCellBorder"
Storyboard.TargetProperty="BorderThickness">
<EasingThicknessKeyFrame KeyTime="0" Value="3, 0, 1, 1" />
</ThicknessAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="HiddenState">
<Storyboard>
<ThicknessAnimationUsingKeyFrames BeginTime="0"
Duration="1"
Storyboard.TargetName="PART_HeaderCellBorder"
Storyboard.TargetProperty="BorderThickness">
<EasingThicknessKeyFrame KeyTime="0" Value="3, 0, 3, 1" />
</ThicknessAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<!-- VisualState name changed from Normal to NormalState as Normal state is used for providing MouseOver effect -->
<VisualState x:Name="NormalState" />
<VisualState x:Name="LastColumnHidden">
<Storyboard>
<ThicknessAnimationUsingKeyFrames BeginTime="0"
Duration="1"
Storyboard.TargetName="PART_HeaderCellBorder"
Storyboard.TargetProperty="BorderThickness">
<EasingThicknessKeyFrame KeyTime="0" Value="0, 0, 3, 1" />
</ThicknessAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="MouseOver" />
<VisualState x:Name="Normal" />
</VisualStateGroup>
<VisualStateGroup x:Name="BorderStates">
<VisualState x:Name="NormalCell" />
<VisualState x:Name="FrozenColumnCell"/>
<VisualState x:Name="FooterColumnCell">
<Storyboard BeginTime="0">
<ThicknessAnimationUsingKeyFrames BeginTime="0"
Duration="1"
Storyboard.TargetName="PART_FooterCellBorder"
Storyboard.TargetProperty="BorderThickness">
<EasingThicknessKeyFrame KeyTime="0" Value="1,0,1,1" />
</ThicknessAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="BeforeFooterColumnCell">
<Storyboard BeginTime="0">
<ThicknessAnimationUsingKeyFrames BeginTime="0"
Duration="1"
Storyboard.TargetName="PART_FooterCellBorder"
Storyboard.TargetProperty="BorderThickness">
<EasingThicknessKeyFrame KeyTime="0" Value="0,0,0,1" />
</ThicknessAnimationUsingKeyFrames>
<ThicknessAnimationUsingKeyFrames BeginTime="0"
Duration="1"
Storyboard.TargetName="PART_HeaderCellBorder"
Storyboard.TargetProperty="BorderThickness">
<EasingThicknessKeyFrame KeyTime="0" Value="0,0,0,1" />
</ThicknessAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border x:Name="PART_FooterCellBorder"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}" />
<Border x:Name="PART_HeaderCellBorder"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
SnapsToDevicePixels="True">
<Grid Margin="{TemplateBinding Padding}" SnapsToDevicePixels="True">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="1" />
</Grid.ColumnDefinitions>
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Focusable="False" />
<Border x:Name="PART_FilterPopUpPresenter" />
<Grid x:Name="PART_SortButtonPresenter"
Grid.Column="1"
SnapsToDevicePixels="True">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0" MinWidth="{Binding Path=SortDirection, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource sortDirectionToWidthConverter}}" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Path Width="8.938"
Height="8.138"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Data="F1M753.644,-13.0589L753.736,-12.9639 753.557,-12.7816 732.137,8.63641 732.137,29.7119 756.445,5.40851 764.094,-2.24384 764.275,-2.42352 771.834,5.1286 796.137,29.4372 796.137,8.36163 774.722,-13.0589 764.181,-23.5967 753.644,-13.0589z"
Fill="Gray"
SnapsToDevicePixels="True"
Stretch="Fill"
Visibility="{Binding Path=SortDirection,
RelativeSource={RelativeSource TemplatedParent},
ConverterParameter=Ascending,
Converter={StaticResource sortDirectionToVisibilityConverter}}">
<Path.RenderTransform>
<TransformGroup>
<TransformGroup.Children>
<RotateTransform Angle="0" />
<ScaleTransform ScaleX="1" ScaleY="1" />
</TransformGroup.Children>
</TransformGroup>
</Path.RenderTransform>
</Path>
<Path Width="8.938"
Height="8.138"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Data="F1M181.297,177.841L181.205,177.746 181.385,177.563 202.804,156.146 202.804,135.07 178.497,159.373 170.847,167.026 170.666,167.205 163.107,159.653 138.804,135.345 138.804,156.42 160.219,177.841 170.76,188.379 181.297,177.841z"
Fill="Gray"
SnapsToDevicePixels="True"
Stretch="Fill"
Visibility="{Binding Path=SortDirection,
RelativeSource={RelativeSource TemplatedParent},
ConverterParameter=Decending,
Converter={StaticResource sortDirectionToVisibilityConverter}}">
<Path.RenderTransform>
<TransformGroup>
<TransformGroup.Children>
<RotateTransform Angle="0" />
<ScaleTransform ScaleX="1" ScaleY="1" />
</TransformGroup.Children>
</TransformGroup>
</Path.RenderTransform>
</Path>
<TextBlock Grid.Column="1"
Margin="0,-4,0,0"
VerticalAlignment="Center"
FontSize="10"
Foreground="{TemplateBinding Foreground}"
SnapsToDevicePixels="True"
Text="{TemplateBinding SortNumber}"
Visibility="{TemplateBinding SortNumberVisibility}" />
</Grid>
<syncfusion:FilterToggleButton x:Name="PART_FilterToggleButton"
Grid.Column="2"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
SnapsToDevicePixels="True"
Visibility="{TemplateBinding FilterIconVisiblity}" />
<GridSplitter Background="Red" Grid.Column="3" Width="1" IsEnabled="False"/>
</Grid>
</Border>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<syncfusion:SfDataGrid x:Name="sfDataGrid"
AllowFiltering="True"
HeaderStyle="{StaticResource headerStyleSeparatorColor}"
ItemsSource="{Binding Path=Orders}"
AutoGenerateColumns="False">
<syncfusion:SfDataGrid.Columns>
<syncfusion:GridTextColumn MappingName="OrderID"/>
<syncfusion:GridTextColumn MappingName="CustomerID" />
<syncfusion:GridTextColumn MappingName="CustomerName" />
<syncfusion:GridTextColumn MappingName="Country" />
<syncfusion:GridCurrencyColumn MappingName="UnitPrice"/>
</syncfusion:SfDataGrid.Columns>
</syncfusion:SfDataGrid>
You can change the column header separator visibility by using the BorderThickness property in GridHeaderCellControl.
<Style x:Key="headerStyleSeparatorVisibility" TargetType="syncfusion:GridHeaderCellControl">
<Setter Property="BorderThickness" Value="0,0,0,1"/>
</Style>
<syncfusion:SfDataGrid x:Name="sfDataGrid"
AllowFiltering="True"
HeaderStyle="{StaticResource headerStyleSeparatorVisibility}"
ItemsSource="{Binding Path=Orders}"
AutoGenerateColumns="False">
<syncfusion:SfDataGrid.Columns>
<syncfusion:GridTextColumn MappingName="OrderID"/>
<syncfusion:GridTextColumn MappingName="CustomerID" />
<syncfusion:GridTextColumn MappingName="CustomerName" />
<syncfusion:GridTextColumn MappingName="Country" />
<syncfusion:GridCurrencyColumn MappingName="UnitPrice"/>
</syncfusion:SfDataGrid.Columns>
</syncfusion:SfDataGrid>
KB article - How to apply the SeparatorBrush and SeparatorVisibility for HeaderCellControl in WPF DataGrid(SfDataGrid)?
Visual Studio 2015 and above versions