[Solved] Grouping on GridViewComboBoxColumn

[Michele]

Hello,
I've got a GridViewComboBoxColumn and I've tried grouping on it... I got the groupheaders empty....
I've read a thread about the filtering solution that pavel pavlov posted but it talks about implementing an IFilteringControl

telerik:RadGridView.Columns>
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding IDDip}" Header="ID IDDip" UniqueName="IDDip" IsReadOnly="True"></telerik:GridViewDataColumn>
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding IDUtser}" Header="Utente" UniqueName="IDUtente" IsReadOnly="True"></telerik:GridViewDataColumn>
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding Nominativo}" Header="Nominativo" UniqueName="Nominativo" IsReadOnly="True"></telerik:GridViewDataColumn>
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding Societa}" Header="Società" UniqueName="Societa" IsReadOnly="True"></telerik:GridViewDataColumn>
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding Filiale}" Header="Filiale" UniqueName="Filiale" IsReadOnly="True"></telerik:GridViewDataColumn>
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding Ruolo}" Header="Ruolo" UniqueName="Ruolo" IsReadOnly="True"></telerik:GridViewDataColumn>
                    <telerik:GridViewComboBoxColumn DataMemberBinding="{Binding IDProfilo}" SelectedValueMemberPath="IDProfilo" DisplayMemberPath="Descrizione" x:Name="cbProfilo" Header="Profilo" UniqueName="Profilo">
                        <telerik:GridViewComboBoxColumn.GroupHeaderTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding Converter={StaticResource profiliConverter},ElementName=IDProfilo}"></TextBlock>
                            </DataTemplate>
                        </telerik:GridViewComboBoxColumn.GroupHeaderTemplate>
                    </telerik:GridViewComboBoxColumn>
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding Funzioni}" Header="Funzioni" UniqueName="Funzioni" IsReadOnly="True"></telerik:GridViewDataColumn>
                    <telerik:GridViewComboBoxColumn DataMemberBinding="{Binding IDStato}"  SelectedValueMemberPath="IDStato" DisplayMemberPath="Descrizione" x:Name="cbStato"  Header="Stato" UniqueName="Stato" ></telerik:GridViewComboBoxColumn>
                </telerik:RadGridView.Columns>

I've adopted a different approach since I was not able to find an IGroupingControl.... I decided to use a converter

namespace xxx.Helper.Converters
{
    public class ProfiliConverter : IValueConverter
    {
        public ObservableCollection<Profilo> ListaProfili { get; set; }

        #region IValueConverter Members

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            GroupViewModel model = value as GroupViewModel;

            ReadOnlyObservableCollection<object> tmpObject = model.Group.Items as ReadOnlyObservableCollection<object>;

            if (tmpObject.Count > 0)
            {
                var utente = tmpObject[0] as Utente;

                if (utente != null)
                {
                    var descr = ListaProfili.Where(o1 => o1.IDProfilo == utente.IDProfilo).Select(o1 => o1.Descrizione).FirstOrDefault();
                    return descr;
                }
            }

            return null;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return null;
        }

        #endregion
    }
}

I'm not able to tell at the binding to use  the value of IDProfilo as value for the converter.... in this way I used I got the names in the groupheader but it seems to be problem with virtualization...any better approach?
Thanks

[Veselin Vasilev]

Hello Paolo,

I could not reproduce your initial problem in our online demo (you can group and everything is ok).

Please create a simple project which exhibits the issue and send it to us in a new support ticket.

Best wishes,
Veselin Vasilev
the Telerik team