Maybee this will help you:

<Style x:Key="TypeFieldStyle" TargetType="{x:Type igEditors:XamComboEditor}" BasedOn="{StaticResource ResourceKey=XamComboEditorDropDownButtonDisplayStyle}">

                    <Style.Setters>

                        <Setter Property="ItemsSource" Value="{Binding RelativeSource={RelativeSource AncestorType={x:Type igDP:XamDataGrid}}, Path=DataContext.AtmTypesList}" />

                        <Setter Property="SelectedItem" Value="{Binding Path=DataItem.Type, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />

                        <Setter Property="DisplayMemberPath" Value="Name" />

                        <Setter Property="ValuePath" Value="Id" />

                        <Setter Property="IsEditable" Value="True" />                        

                    </Style.Setters>

                </Style>

In XamDataGrid:

<igDP:XamDataGrid.FieldLayouts>

                <igDP:FieldLayout>

                    <igDP:UnboundField BindingPath="CaseTypeId" Label="Тип кассет">

                        <igDP:UnboundField.Settings>

                                <igDP:FieldSettings EditorStyle="{StaticResource  CaseTypeFieldStyle}" />

                        </igDP:UnboundField.Settings>

                    </igDP:UnboundField>                    

                    <igDP:Field Name="Count" Width="*" Label="Количество"/>

                </igDP:FieldLayout>

            </igDP:XamDataGrid.FieldLayouts>

in my binded DTO class

[DataContract]

    public class AtmModelConfiguration : GuidDto<AtmModelConfiguration>

    {

        public Guid? CaseTypeId

        {

            get { return CaseType == null ? (Guid?)null : CaseType.Id; }

            set

            {

                if (value.HasValue)

                    CaseType = new IdNamePair<Guid> { Id = value.Value };

            }

        }

        private IdNamePair<Guid> _caseType;

        [DataMember]

        public IdNamePair<Guid> CaseType

        {

            get { return _caseType; }

            set

            {

                _caseType = value;

                RaisePropertyChangedEvent(() => CaseType);

            }

        }

        [DataMember]

        public uint Count { get; set; }

    }

where IdNamePair<Guid> is class with fields Guid Id and Name

Name - Displays Id - value

Hello again Matt

I actually have another question to this issue.

Although the above solution works just fine with the "Note-example", I would like to know if it is possible to databind the Combobox using SelectedItem instead of ValuePath?

In some cases this would be nice in order to update my ViewModel/database...

Hello Matt

I have looked at the sample and used it in my project. It now works just fine!

HI,

 I am attaching a new sample that binds the XamComboEdtior's ItemSource to the DataContent.

 Plesase review my sample.

 Sincerely,

 Matt
 Developer Support Engineer

Please help, spent a second day on this issue, read the entire forum and the internet, and nothing found it.