Set root operator initally to 'OR' logical operator

[Daniela]

Hi!
Im looking for a way to set the root operator to initially 'OR'. Is there a way to achieve this.
I tried setting:

public MainPage()
       {
           _mainViewModel = new MainViewModel();
           this.DataContext = _mainViewModel;

           InitializeComponent();
           this.dataFilteQuery.FilterDescriptors.LogicalOperator = Telerik.Windows.Data.FilterCompositionLogicalOperator.Or;

       }

 the Logical Operator of the FilterDescriptor after initialization of the components. But the operator stays as 'AND' when the page is loaded.

[Yoan]

Hi Daniela,

You can change the logical operator between the two field filters, like so:

countryFilter.FieldFilter.LogicalOperator = Telerik.Windows.Data.FilterCompositionLogicalOperator.Or;

 I suggest you to check this help article, where you can find detailed information about programmatic filtering. 

Regards,
Yoan
the Telerik team

[Yoan]

Hello Daniela,

 
Please excuse me for misleading you. In my previous post I had shown you how to set the logical operator for RadGridView.

Indeed, the logical operator of RadDataFilter has to be set as you tried. For your convenience I have prepared a sample project. Please find it attached for a reference.

All the best,
Yoan
the Telerik team

[Daniela]

Hello Yoan,
thank you for your quick reply.

The problem was, that I set the source of the filter (binded to my ViewModel) in the xaml instead the code behind (see attached code). This was the only change between your and my code. I wonder why this made the trick...?

Thanks again,
Daniela

<telerik:RadDataFilter x:Name="dataFilteQuery"
Margin="5 5 20 0"
Source="{Binding SearchResults}"
BorderThickness="0"
VerticalAlignment="Stretch"
EditorTemplateSelector="{StaticResource EditorTemplateSelector}"
EditorCreated="dataFilterQuery_EditorCreated"
MinWidth="600"/>

[Yoan]

Hi Daniela,

 Indeed, it is working as expected. You can check the attached project. As you can see, I set DataFilter's source in the XAML. 

All the best,
Yoan
the Telerik team