Xceed DataGrid for WPF v7.3 Documentation
    Centering column titles

    The following example demonstrates how to center the column titles that are displayed as the content of the corresponding column-manager cells by creating an implicit style that targets the ColumnManagerCell data type and that sets the HorizontalContentAlignment and VerticalContentAlignment properties to Center.

    XAML
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    <Grid xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid">
      <Grid.Resources>
         <xcdg:DataGridCollectionViewSource x:Key="cvs_orders"
                                            Source="{Binding Source={x:Static Application.Current},
                                                      Path=Orders}" />
         <Style TargetType="{x:Type xcdg:ColumnManagerCell}">
            <Setter Property="HorizontalContentAlignment"
                    Value="Center"/>
            <Setter Property="VerticalContentAlignment"
                    Value="Center" />
         </Style>
      </Grid.Resources>
      <xcdg:DataGridControl x:Name="OrdersGrid"
                          ItemsSource="{Binding Source={StaticResource cvs_orders}}" />
    </Grid>