Set StaysOpen Property to False of Parent Popup of FilteringControl

Updated on Sep 15, 2025

Environment

Product Version	2023.2.606
Product	RadVirtualGrid for WPF

Description

How to set the StaysOpen property of the RadVirtualGrid FilteringControl's parent Popup element.

Solution

To achieve this requirement, utilize the EventManager.RegisterClassHandler method to subscribe to the Loaded event of each FilteringControl instance:

Subscribing to Loaded event of FilteringControl

C#

    public partial class MainWindow : Window
    {
        static MainWindow()
        {
            EventManager.RegisterClassHandler(typeof(FilteringControl), LoadedEvent, new RoutedEventHandler (OnLoaded));
        }
    }

VB.NET

    Public Partial Class MainWindow
        Inherits Window

        Private Shared Sub New()
            EventManager.RegisterClassHandler(GetType(FilteringControl), LoadedEvent, New RoutedEventHandler(OnLoaded))
        End Sub
    End Class

In the added event handler, retrieve the parent Popup element of the FilteringControl instance using the ParentOfType extension method. Then, set its StaysOpen property to False.

Set the StaysOpen property of the parent Popup

C#

public partial class MainWindow : Window
    {
        static MainWindow()
        {
            EventManager.RegisterClassHandler(typeof(FilteringControl), LoadedEvent, new    RoutedEventHandler(OnLoaded));
        }

        private static void OnLoaded(object sender, RoutedEventArgs e)
        {
            FilteringControl filteringControl = (FilteringControl)sender;

            Popup popup = filteringControl.ParentOfType<Popup>();

            if (popup != null)
            {
                popup.StaysOpen = false;
            }
        }
    }

VB.NET

    Public Partial Class MainWindow
        Inherits Window
    
        Private Shared Sub New()
            EventManager.RegisterClassHandler(GetType(FilteringControl), LoadedEvent, New   RoutedEventHandler(AddressOf OnLoaded))
        End Sub
    
        Private Shared Sub OnLoaded(ByVal sender As Object, ByVal e As RoutedEventArgs)
            Dim filteringControl As FilteringControl = CType(sender, FilteringControl)
            Dim popup As Popup = filteringControl.ParentOfType(Of Popup)()
    
            If popup IsNot Nothing Then
                popup.StaysOpen = False
            End If
        End Sub
    End Class