RadDataForm and RadComboBox

[Don]

I have a RadDataForm using custom controls via a template and is bound and displays fine, I am having trouble populating the RadComboBoxes inside the RadDataForm and then having the correct item selected.  I am populating an observablecollection and setting that to the dataforms itemsSource. This works fine. I as well populate another observablecollection and attempt to set that to a radcombobox inside the raddataform by using RadDataForm.FindName("AppointmentTypeList") in the MainPage.xaml.cs.

Also already read this and still not sure:
http://www.telerik.com/help/silverlight/raddatafor-edit-lookup-values-with-radcombobox.html

I suppose there is something with ViewModel, and I have no clue how to use this or have it interface with my object and the radcombobox.

Environment Facts: Silverlight 4, Windows 7, iExplorer 8.0.7601.17514, RadControls_for_Silverlight_4_2011_1_0419, C#

XAML:

 

<DataTemplate x:Key="AppointmentItemTemplate" x:Name="AppointmentItemTemplate">
   <StackPanel Orientation="Horizontal" >
        <Grid Background="White">
         <TextBox HorizontalAlignment="Left" VerticalAlignment="Center" Grid.Row="1" Grid.Column="1"
                                             Margin="20,0,0,0" Width="250"
                                             x:Name="AppointmentTitle"
                                             Text="{Binding AppointmentTitle, Mode=TwoWay}" />

     <telerik:RadComboBox HorizontalAlignment="Left" VerticalAlignment="Center" Grid.Row="4" Grid.Column="1"
                                 Name="AppointmentTypeList"
                                 SelectedValuePath="AppointmentAppointmentTypeId"
                                 DisplayMemberPath="AppointmentTypeName"/>
       </Grid>
   </StackPanel>
</DataTemplate>
<telerik:RadDataForm HorizontalAlignment="Left" VerticalAlignment="Top" Height="420" Width="520"
                                     Name="AppointmentTemplateForm"
                                     Header="Appointment Template Form"
                                     Visibility="Collapsed"
                                     AutoGenerateFields="False"
                                     ReadOnlyTemplate="{StaticResource AppointmentItemTemplate}"
                                     EditTemplate="{StaticResource AppointmentItemTemplate}"
                                     NewItemTemplate="{StaticResource AppointmentItemTemplate}"
                                     EditEnded="AppointmentTemplateForm_EditEnded">
</telerik:RadDataForm>

CS:

//An observable collection is used to hold the items
 private ObservableCollection<AppointmentTypeItem> appointmentTypeItems;
//Observable collection is populated via SOAP
//Code not working – used to load items into the combobox
RadComboBox appointmentTypesBox = (RadComboBox)AppointmentTemplateForm.FindName("AppointmentTypeList");
appointmentTypesBox.ItemsSource = appointmentTypeItems;

//Base Object Bound to DataForm:
public class AppointmentTemplateItem
 {
        private EntityReference appointmentAppointmentTypeId; //Value used to select correct DropDown Item.
        public EntityReference AppointmentAppointmentTypeId { get { return this.appointmentAppointmentTypeId; } set {
                                 this.appointmentAppointmentTypeId = value; } }
}

//Class that defines the object to be bound to the RadComboBox
public class AppointmentTypeItem
{
        private Guid appointmentTypeId;
        private String appointmentTypeName;

        public AppointmentTypeItem() { }

        public AppointmentTypeItem(Guid appointmentTypeId, String appointmentTypeName)
        {
            AppointmentTypeId = appointmentTypeId;
            AppointmentTypeName = appointmentTypeName;
        }

        public Guid AppointmentTypeId { get { return this.appointmentTypeId; } set { this.appointmentTypeId = value; } }
        public String AppointmentTypeName { get { return this.AppointmentTypeName; } set { this.appointmentTypeName = value; } }
}

[Don]

Can now bind the data to the ComboBox by adding the Loaded="AppointmentTypeList_Loaded"
I was able to access the control and populate it in the codebehind

XAML:

 

 

<telerik:RadComboBox HorizontalAlignment="Left" VerticalAlignment="Center" Grid.Row="4" Grid.Column="1"
                                                         Margin="20,0,0,0" Width="250"
                                                         Name="AppointmentTypeList"
                                                         SelectedValuePath="AppointmentTypeId"
                                                         DisplayMemberPath="AppointmentTypeName"
                                                         ItemsSource="{Binding}"
                                                         SelectedValue="{Binding AppointmentAppointmentTypeId, Mode=TwoWay}"
                                                         Loaded="AppointmentTypeList_Loaded"/>

CS:

private void AppointmentTypeList_Loaded(object sender, RoutedEventArgs e)
{
    RadComboBox currentComboBox = (RadComboBox)sender;
    currentComboBox.DataContext = appointmentTypeItems;  //Observable Collection
}

I am still unable to have the proper item selected.
SelectedValue="{Binding AppointmentAppointmentTypeId, Mode=TwoWay}" is not working
AppointmentAppointmentTypeId is an EntityReference (CRM 2011 Product) and not a GUID, which the appointmentTypeItems observable collection contains as the 'value' to match when binding.

 

[Pavel Pavlov]

Hi Don,

I am attaching a small sample  application , based on your code .
I have fixed a few things. Please use it as a starting point.

Best wishes,
Pavel Pavlov
the Telerik team