Problem with GridViewComboBoxColumn

[Fabien]

Hello, 

First, i precise that i'm french, so, sorry for mistakes you could find in this thread.

I'm working with a RadGridView, and, in witch column cells i have to place a Combobox.

I writed this code :

<Grid Width="900" >
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <telerik:RadGridView ItemsSource="{Binding ListIntervention}" IsSynchronizedWithCurrentItem="True" AutoGenerateColumns="False" ShowInsertRow="True" >
            <telerik:RadGridView.Columns>
                <telerik:GridViewComboBoxColumn Header="Objet intervention" Width="300"
                                                ItemsSource="{Binding ListObjet}"
                                                DataMemberBinding="{Binding ObjetId, Mode=TwoWay}"
                                                DisplayMemberPath="Libelle"
                                                SelectedValueMemberPath="Id"
                                                />
                <telerik:GridViewComboBoxColumn Header="Sous catégorie" Width="300"
                                                ItemsSource="{Binding ListSousCategorie}"
                                                DataMemberBinding="{Binding SsCategorieId, Mode=TwoWay}"
                                                DisplayMemberPath="Libelle"
                                                SelectedValueMemberPath="Id"
                                                />
                <telerik:GridViewComboBoxColumn Header="Catégorie" Width="*"
                                                ItemsSource="{Binding ListCategorie}"
                                                DataMemberBinding="{Binding CategorieId, Mode=TwoWay}"
                                                DisplayMemberPath="Libelle"
                                                SelectedValueMemberPath="Id"
                                                />

            </telerik:RadGridView.Columns>
        </telerik:RadGridView>
    </Grid>

 
And for the list, the definition is in a viewmodel class :

public class GestionAccueilViewModel : ActiveAwareViewModelBase
{

    #region Fields

    private readonly ITroncCommunService _troncCommunService;
    private readonly IMessageBoxService _messageBoxService;

    #endregion

    #region Ctor

    public GestionAccueilViewModel(ITroncCommunService troncCommunService, IMessageBoxService messageBoxService)
    {
        _troncCommunService=troncCommunService;
        _messageBoxService=messageBoxService;

        // Init.
        ListSousCategorie=new ObservableCollection<TypeBouchonObjet>();
        ListCategorie=new ObservableCollection<TypeBouchonObjet>();
        ListObjet = new ObservableCollection<TypeBouchonObjet>();
        ListIntervention=new ObservableCollection<TypeBouchonIntervention>();

        // Mocks

        ListObjet.Add(new TypeBouchonObjet() { Id=1, Libelle="Date de paiement des prestations" });
        ListObjet.Add(new TypeBouchonObjet() { Id=2, Libelle="Autre objet" });

        ListSousCategorie.Add(new TypeBouchonObjet() { Id=1, Libelle="Logement nature" });
        ListSousCategorie.Add(new TypeBouchonObjet() { Id=2, Libelle="Autre sous-catégorie" });

        ListCategorie.Add(new TypeBouchonObjet() { Id=1, Libelle="AVNAT" });
        ListCategorie.Add(new TypeBouchonObjet() { Id=2, Libelle="Autre categorie" });

        ListIntervention.Add(new TypeBouchonIntervention() { ObjetId=1, CategorieId=1, SsCategorieId=1 });
        ListIntervention.Add(new TypeBouchonIntervention() { ObjetId=2, CategorieId=2, SsCategorieId=2 });
    }

    #endregion

    #region Listes
    private ObservableCollection<TypeBouchonIntervention> _listIntervention;
    public ObservableCollection<TypeBouchonIntervention> ListIntervention
    {
        get
        {
            return _listIntervention;
        }
        set
        {
            SetValueAndRaiseEventIfPropertyChanged<ObservableCollection<TypeBouchonIntervention>>("ListIntervention", ref _listIntervention, ref value);
        }
    }

    // Test RadGridView
    public ObservableCollection<TypeBouchonObjet> ListObjet { get; set; }

    public ObservableCollection<TypeBouchonObjet> ListCategorie { get; set; }

    public ObservableCollection<TypeBouchonObjet> ListSousCategorie { get; set; }

    #endregion

    #region Commands

    /// <summary>
    /// Valide l'accueil en cours
    /// </summary>
    public ICommand ValiderAccueilCommand
    { get; set; }

    /// <summary>
    /// RAZ de l'accueil en cours
    /// </summary>
    public ICommand AnnulerAccueilCommand
    { get; set; }

    /// <summary>
    /// Crée un nouvel écran d'accueil
    /// </summary>
    public ICommand NouvelAccueilCommand
    { get; set; }

    /// <summary>
    /// Recherche d'une personne via l'écran d'accueil
    /// </summary>
    public ICommand RechercherPersonneAccueilCommand
    { get; set; }

    #endregion

where TypeBouchon and TypeBouchonGrille are mocks class because, i'm just in the begin of development (any WCF Services implemented) :

public class TypeBouchon
    {
        public string Code { get; set; }
        public string Libelle{ get; set; }
    }

 public class TypeBouchonIntervention
    {
        public int ObjetId { get; set; }

        public int SsCategorieId { get; set; }

        public int CategorieId { get; set; }
    }

My problem :

I select a value in the comboxBox of the first column for example. When i focus the second combo (in the second column), the first column appears empty... 
I'd want to keep my selection in each columns...

I think my databing is correct, and i don't see the problem...

I send my screenshot in attach file.

Fab'

[Dimitrina]

Hello Fabien,

 Could you please check this help article. I believe that the suggestion solution is just what you need. 

Kind regards,
Didie
the Telerik team