RadCombobox Selection in GridViewComboBoxColumn

[Levon]

Hi, 

I have a GridViewComboBoxColumn in my Grid, and an ObservableCollection is bound to it.

<telerik:GridViewComboBoxColumn DataMemberBinding="{Binding GroupName, Mode=TwoWay}"
                      ItemsSource="{Binding Groups}"
                      Header="Group"
                      IsFilterable="False"
                      Width="150">

When I click the last item of the combobox a popup is opened, so that I could enter a new GroupName(here is the picture). The GroupName is added to the Groups ObservableCollection, and the popup closes(MVVM Light messaging is used).

private void ComboSelectionChanged(object sender, RadRoutedEventArgs args)

{

    var comboBox = args.OriginalSource as RadComboBox;

 

    if (comboBox == null || comboBox.Text != "New...")

        return;

 

    this.Grid.ActionOnLostFocus = ActionOnLostFocus.None;



    ChildWindow wnd = new GroupCreationPopup();

    wnd.DataContext = this.DataContext;

    wnd.Show();

}

When the popup closes the new GroupName is added to the collection, but it is not displayed in the combobox. the combo becomes empty(here is the picture) .

How can I solve this problem?

[Yoan]

Hi Levon,

I would suggest you to check this help article where you can find information about how to properly define GridViewComboBoxColumn. Then you can check this troubleshooting article.

I hope this helps.

Regards,
Yoan
Telerik