Subscribe to SelectionChanged of RadComboBox in RadGridView Column FilteringControl

Environment

Product Version	2022.3.1109
Product	RadGridView for WPF

Description

How to attach to the SelectionChanged event of the RadComboBox elements hosted in the FilteringControl of RadGridView's GridViewColumn.

Solution

To subscribe to the SelectionChanged event, you can use the EventManager class in order to subscribe all RadComboBox instances to the event. Then, in the event handler, you can check if the current RadComboBox is hosted in FilteringControl. In that case, execute the code in the handler.

public partial class MainWindow : Window 
{ 
        static MainWindow() 
        { 
                EventManager.RegisterClassHandler(typeof(RadComboBox), RadComboBox.SelectionChangedEvent, new SelectionChangedEventHandler(OnFilteringControlComboBoxSelectionChanged));          
        } 
 
 
    private static void OnFilteringControlComboBoxSelectionChanged(object sender, SelectionChangedEventArgs e) 
    { 
        var comboBox = (RadComboBox)sender; 
        var filteringControl = comboBox.ParentOfType<FilteringControl>(); 
        if (filteringControl != null) 
        { 
            // execute the custom selection changed code here 
        } 
    } 
 
    public MainWindow() 
    { 
        InitializeComponent();             
    } 
}