Filtering DataFormComboBoxField

[Harald]

I am using a DataSource and a DataForm with a DataTemplate in WPF. In principle it works.
DataSource:
<telerik:RadEntityFrameworkDataSource Name="AcademicTitleDataSource" QueryName="CatalogEntries">
  <telerik:RadEntityFrameworkDataSource.DbContext>
    <local:MyEntities x:Name="AcademicTitleContext" />
  </telerik:RadEntityFrameworkDataSource.DbContext>
</telerik:RadEntityFrameworkDataSource>
DataFormComboBoxField:
<telerik:DataFormComboBoxField x:Name="AcademicTitleComboBox" Grid.Column="0" Grid.Row="7" Label="Titel:"                             
                                ItemsSource="{Binding DataView, ElementName=AcademicTitleDataSource}"
                                DataMemberBinding="{Binding AcademicTitle}"
                                SelectedValuePath="ID"
                                DisplayMemberPath="EntryName" />
Now i want to display only certain items from the CatalogEntries wherw the CatalogID = 5. How can i filtering the Data?

[Harald]

How can I address a field in a RadDataForm per code (C#) if this has been defined using a template in WPF?

 Code like "this.DataFormName.DataFormFieldName." does not work.

[Stefan]

Hi Harald,

For this scenario, I suggest you applying IValueConverter to the ItemsSource binding of DataFormComboBoxField and filter the source collection in its Convert() method.

Does this approach fit your requirements?

Best Regards,
Stefan X1
Telerik

[Harald]

Now i created the datasources in the C#-file and bound this datasources to the WPF-Controls. In C# i generate a query for the ComboBox. It works. Thank you.