[Solved] How do I properly bind this combobox in the Gridview?

[Fred]

I'm having trouble databinding here. This is more of a silverlight question I guess then Telerik, as I had same problem with Telerik Combo's

I have a Telerik GridView that has two columns. I bind rows to the GridView but only have data for the first column. I want the user to select values from comboboxes in the second column.  The Display values show up properly but the values come back as my class name instead of the actual value. Can't figure out now to have the comboboxes give me the actual values, I feel I'm not binding it right. Instead of the value of Import ImportDataFieldName I get "WCFService.ImportSystemFields" actual class name

<telerikGridView:RadGridView
                x:Name="gvHeaders"
                ShowGroupPanel="False"
                Margin="-72,145,-2,54"
                CanUserReorderColumns="False"
                CanUserInsertRows="False"
                CanUserSortColumns="False"
                HorizontalAlignment="Left"
                AutoGenerateColumns="False"
                IsReadOnly="False"
                Foreground="Black"
                CanUserSelect="True" Background="{x:Null}" Width="500"
                >
                    <telerikGridView:RadGridView.Columns>
                        <telerikGridView:GridViewDataColumn
                        Header="Your Import Headers"
                        UniqueName="ImportHeaders"
                        IsReadOnly="True"
                        Background="{x:Null}"
                        DataMemberBinding="{Binding HeaderField}" />
                        <telerikGridView:GridViewDataColumn Header="System Fields" UniqueName="SystemFields">
                            <telerikGridView:GridViewColumn.CellTemplate>
                                <DataTemplate>
                                    <ComboBox x:Name="cmbTestCombo"
                                        SelectedItem="{Binding Path=ImportDataFieldName, Mode=TwoWay}"
                                        Loaded="SetDataForCombo"
                                        DisplayMemberPath="DisplayName"
                                        Height="24" Width="120">
                                    </ComboBox>
                                </DataTemplate>
                            </telerikGridView:GridViewColumn.CellTemplate>
                        </telerikGridView:GridViewDataColumn>
                    </telerikGridView:RadGridView.Columns>
                </telerikGridView:RadGridView>

My Class that binds to the Gridview

Public Class ImportHeaderData
    Implements INotifyPropertyChanged

    Private _headerfield As String
    Public Property HeaderField() As String
        Get
            Return _headerfield
        End Get
        Set(ByVal Value As String)
            _headerfield = Value
            FirePropertyChange("HeaderField")
        End Set
    End Property

    Private _importDataFieldName As String
    Public Property ImportDataFieldName() As String
        Get
            Return _importDataFieldName
        End Get
        Set(ByVal value As String)
            _importDataFieldName = value
            FirePropertyChange("ImportDataFieldName")
        End Set
    End Property

    Public Shared Function GetData(ByVal SourceString As String()) As List(Of ImportHeaderData)
        Dim Source As New List(Of ImportHeaderData)
        Dim oData As ImportHeaderData
        For Each Item As String In SourceString
            oData = New ImportHeaderData
            oData.HeaderField = Item
            oData.ImportDataFieldName = "UserRequestID"
            Source.Add(oData)
        Next
        oData = Nothing
        Return Source
    End Function

    Private Sub FirePropertyChange(ByVal PropertyName As String)
        RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(PropertyName))
    End Sub

    Public Event PropertyChanged(ByVal sender As Object, ByVal e As System.ComponentModel.PropertyChangedEventArgs) Implements System.ComponentModel.INotifyPropertyChanged.PropertyChanged
End Class

I bind it to grid on new()

Public Sub New()
        InitializeComponent()
        gvHeaders.ItemsSource = ImportHeaderData.GetData("rowvalue1,value2,value4".Split(","))
    End Sub

then on Combobox load I bind this class.

Public Shared DestinationAreaSystemFields As ObservableCollection(Of WCFService.ImportSystemFields)  Private Sub SetDataForCombo(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) CType(sender, System.Windows.Controls.ComboBox).ItemsSource = Helper.DestinationAreaSystemFields End Sub

<DataContract()> _
Public Class ImportSystemFields

    Private _DataFieldName As String
    <DataMember()> _
    Public Property DataFieldName() As String
        Get
            Return _DataFieldName
        End Get
        Set(ByVal Value As String)
            _DataFieldName = Value
        End Set
    End Property


    Private _displayName As String
    <DataMember()> _
    Public Property DisplayName() As String
        Get
            Return _displayName
        End Get
        Set(ByVal Value As String)
            _displayName = Value
        End Set
    End Property

End Class