<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:DataRow}">
     <Style.Triggers>
       <DataTrigger Binding="{Binding Path=[EmployeeID]}" Value="1">
         <Setter Property="Background" Value="Pink"/>
       </DataTrigger>
       <DataTrigger Binding="{Binding Path=[EmployeeID]}" Value="3">
         <Setter Property="Background" Value="Blue"/>
       </DataTrigger>
     </Style.Triggers>
   </Style>
 </Grid.Resources>
<xcdg:DataGridControl x:Name="OrdersGrid"
                        ItemsSource="{Binding Source={StaticResource cvs_orders}}"/>
</Grid>