The following example demonstrates how to add vertical and horizontal grid lines to a grid in table-view layout. A style for the ColumnManagerRow objects has been added to the resources to remove the horizontal grid line drawn above the column-manager row in the fixed headers.

XAML
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<Grid xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid">
   <Grid.Resources>
      <Style TargetType="{x:Type xcdg:ColumnManagerRow}">
         <Setter Property="BorderThickness" Value="0"/>
      </Style>
      <xcdg:DataGridCollectionViewSource x:Key="cvs_orders"
                                    Source="{Binding Source={x:Static Application.Current},
                                                      Path=Orders}"/>
   </Grid.Resources>   
   <xcdg:DataGridControl x:Name="OrdersGrid"
                         ItemsSource="{Binding Source={StaticResource cvs_orders}}">
      <xcdg:DataGridControl.View>

        <xcdg:TableView HorizontalGridLineThickness="1" VerticalGridLineThickness="1">
           <xcdg:TableView.HorizontalGridLineBrush>
              <SolidColorBrush Color="Orange"/>
           </xcdg:TableView.HorizontalGridLineBrush>
           <xcdg:TableView.VerticalGridLineBrush>
              <SolidColorBrush Color="Orange"/>
           </xcdg:TableView.VerticalGridLineBrush>
        </xcdg:TableView> 
      </xcdg:DataGridControl.View>
   </xcdg:DataGridControl>
</Grid>
VB.NET
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Dim view As New TableView()
view.HorizontalGridLineThickness = 1
view.VerticalGridLineThickness = 1

view.HorizontalGridLineBrush = Brushes.Orange
view.VerticalGridLineBrush = Brushes.Orange

dataGridControl.View = view
C#
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TableView view = new TableView();
view.HorizontalGridLineThickness = 1;
view.VerticalGridLineThickness = 1;

view.HorizontalGridLineBrush = Brushes.Orange;
view.VerticalGridLineBrush = Brushes.Orange;

dataGridControl.View = view;