Xceed DataGrid for WPF v7.2 Documentation
Defining foreign key descriptions

The following example demonstrates how to define foreign key descriptions, which will correctly sort and display values rather than keys.

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=Products}" >

         <xcdg:DataGridCollectionViewSource.ItemProperties>
            <xcdg:DataGridItemProperty Name="CategoryID"
                                       Title="Category">
               <xcdg:DataGridItemProperty.ForeignKeyDescription>
                  <xcdg:DataTableForeignKeyDescription ItemsSource="{Binding Source={x:Static Application.Current}, Path=Categories}"
                                                       ValuePath="CategoryID"
                                                       DisplayMemberPath="CategoryName" />
               </xcdg:DataGridItemProperty.ForeignKeyDescription>
            </xcdg:DataGridItemProperty>

            <xcdg:DataGridItemProperty Name="SupplierID"
                                       Title="Supplier">
               <xcdg:DataGridItemProperty.ForeignKeyDescription>
                  <xcdg:DataTableForeignKeyDescription ItemsSource="{Binding Source={x:Static Application.Current}, Path=Suppliers}"
                                                       ValuePath="SupplierID"
                                                       DisplayMemberPath="CompanyName" />
               </xcdg:DataGridItemProperty.ForeignKeyDescription>
            </xcdg:DataGridItemProperty>
         </xcdg:DataGridCollectionViewSource.ItemProperties>

      </xcdg:DataGridCollectionViewSource>
 </Grid.Resources>      

 <xcdg:DataGridControl x:Name="OrdersGrid"
                       ItemsSource="{Binding Source={StaticResource cvs_orders}}"
                       AutoCreateForeignKeyConfigurations="True"/>
</Grid>