Hello - We are evaluating your product and have a question regarding binding converters.

We have a ComboBox in our XamDataGrid.  It's ItemSource is an observable collection of id/value pairs.  The selected value of the ComboBox is bound to a property in our view model.  Everything works fine if the bound property is a native string.  However, if we attempt to bind to a property of a complex type using a converter, the value coming into the converter is always null.

Here is the XAML (ItemsSource is bound in code behind):

<igDP:ComboBoxField Name="CustomerId" Converter="{StaticResource idToStringConverter}" 
                      IsEditable="True" IsEnabled="True">
   <igDP:ComboBoxField.EditorStyle>
       <Style TargetType="igEditors:XamComboEditor">
          <Setter Property="ValuePath" Value="Id" />
          <Setter Property="DisplayMemberPath" Value="DisplayName" />
       </Style>
   </igDP:ComboBoxField.EditorStyle>
</igDP:ComboBoxField>

Here is our Converter:

 public class IdToStringConverter : IValueConverter 
  {
      public object Convert ( object value, Type targetType, object parameter,
                                System.Globalization.CultureInfo culture )
   {
           return ( value is Id) ? ( ( Id ) value ).Value: null;
   }

       public object ConvertBack ( object value, Type targetType, object parameter, 
                                 System.Globalization.CultureInfo culture )
   {
           return ( value is string ) ? new Id( value as string ): null;
   }
  }

Here is the property we are trying to bind to in our ViewModel:
public Id CustomerId { set; get; }

When we bind to a native WPF DataGrid ComboboxColumn, it is simply this:

<DataGridComboBoxColumn
          SelectedValueBinding="{Binding Path=CustomerId, 
                                 Converter={StaticResource idToStringConverter}}"
          SelectedValuePath="Id"
          DisplayMemberPath="DisplayName"/>

We have searched your forums and samples but have not found a straightforward answer.

Thank you