Issue binding RadComboBox in RadWindow

[David Brenchley]

When binding to the SelectedItem on a RadComboBox in a RadWindow, it doesn't show the selected item as selected until I select a value from the dropdown.  The value is in the dropdown.  Once another value has been selected, it appears to work and sync fine.  When I use a regular Silverlight ComboBox instead of RadComboBox, it all works fine.  I populate the ItemsSource in the constuctor of the viewmodel.  Using MVVM through Caliburn.

 

 

[ImportingConstructor]

public BannerDetailViewModel(IEventAggregator events, BannerDetail bannerDetail, CategoryList categories) {

this.categories = categories;

NotifyOfPropertyChange(() => Categories);

 

Model = bannerDetail;

 

NotifyOfPropertyChange(() => Model);

 

this.DisplayName = "Banner";

}

<

telerik:RadComboBox Name="CategoryCombo" Grid.Row="3" Grid.Column="1" SelectedItem="{Binding Model.Category, Mode=TwoWay, NotifyOnValidationError=True, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True, ValidatesOnExceptions=True}" ItemsSource="{Binding Path=Categories}" DisplayMemberPath="Name" ClearSelectionButtonVisibility="Visible" ClearSelectionButtonContent=" " VerticalAlignment="Center" HorizontalAlignment="Left"/>

 

<ComboBox Name="testCombo" SelectedItem="{Binding Model.Category, Mode=TwoWay, NotifyOnValidationError=True, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True, ValidatesOnExceptions=True}" ItemsSource="{Binding Path=Categories}" DisplayMemberPath="Name" />

[Yana]

Hello David,

We're not sure what could be the reason for this issue. Could you please send us a simple runnable project where the problem can be observed? Thanks

Regards,
Yana
the Telerik team

[Ronny]

Hey guys,

any news concerning this issue? It's the same problem for me.

Kind regards,
Ronny

[Yana]

Hi Ronny,

We weren't able to reproduce the problem.  Without observing the issue at our side, there is not much we can do to help.

All the best,
Yana
the Telerik team

[Chris]

Binding to SelectedValue instead of SelectedItem fixed this for me.