This example illustrates how to change the orientation of column header text in WPF TreeGrid (SfTreeGrid).
Orientation of the TreeGrid column header text can be changed by editing the control template of the TreeGridHeaderCell and applying RotateTransform.
<Style TargetType="syncfusion:TreeGridHeaderCell">
<Setter Property="Background" Value="{StaticResource HeaderBackgroundBrush}" />
<Setter Property="Foreground" Value="{StaticResource HeaderForegroundBrush}" />
<Setter Property="BorderBrush" Value="{StaticResource HeaderBorderBrush}" />
<Setter Property="BorderThickness" Value="0,0,1,1" />
<Setter Property="HorizontalContentAlignment" Value="Center" />
<Setter Property="Padding" Value="5,3,5,3" />
<Setter Property="FontSize" Value="14" />
<Setter Property="FontWeight" Value="Normal" />
<Setter Property="IsTabStop" Value="False" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="syncfusion:TreeGridHeaderCell">
<Grid>
<Grid.LayoutTransform>
<RotateTransform Angle="90"/>
</Grid.LayoutTransform>
<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" />
</Grid.ColumnDefinitions>
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="Center"
Focusable="False" />
<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="{TemplateBinding Foreground}"
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="{TemplateBinding Foreground}"
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>
</Grid>
</Border>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>