kb-contextmenu-retrieve-the-clicked-element.md

title	description	page_title	type	slug	position	tags	ticketid	res_type
Retrieve the Clicked Item When Opening a RadContextMenu	This article shows how to retrieve the clicked item when opening the RadContextMenu	Retrieve the Item That is Clicked on When a RadContextMenu is Opened	troubleshooting	kb-contextmenu-retrieve-clicked-item-when-opening	0		1613605	kb

Environment

Product Version	2023.3.1114
Product	RadContextMenu for WPF

Description

Retrieve the clicked item when the RadContextMenu is opened.

Solution

You can derive from the RadContextMenu class and add an additional dependency property.

[C#] Deriving from the RadContextMenu class and adding an additional dependency property

{{region kb-contextmenu-retrieve-clicked-item-when-opening-0}} public class ExtendedContextMenu : RadContextMenu { public static readonly DependencyProperty ClickedItemProperty = DependencyProperty.Register("ClickedItem", typeof(FrameworkElement), typeof(ExtendedContextMenu), new PropertyMetadata(null));

    public FrameworkElement ClickedItem
    {
        get { return (FrameworkElement)GetValue(ClickedItemProperty); }
        set { SetValue(ClickedItemProperty, value); }
    }
}

{{endregion}}

[VB.NET] Deriving from the RadContextMenu class and adding an additional dependency property

{{region kb-contextmenu-retrieve-clicked-item-when-opening-1}} Public Class ExtendedContextMenu Inherits RadContextMenu

    Public Shared ReadOnly ClickedItemProperty As DependencyProperty = DependencyProperty.Register("ClickedItem", GetType(FrameworkElement), GetType(ExtendedContextMenu), New PropertyMetadata(Nothing))

    Public Property ClickedItem As FrameworkElement
        Get
            Return CType(GetValue(ClickedItemProperty), FrameworkElement)
        End Get
        Set(ByVal value As FrameworkElement)
            SetValue(ClickedItemProperty, value)
        End Set
    End Property
End Class

{{endregion}}

To assign a value to the dependency property, override the OnOpened method and call the GetClickedElement method. This method will allow you to retrieve the first element of the given type at the click point coordinates.

In the following example, the custom RadContextMenu is used in the RadTreeListView control and a reference to the clicked TreeListViewRow instance is retrieved in the OnOpened method.

[C#] Retrieving the clicked TreeListViewRow instance inside the OnOpened method of the custom RadContextMenu

{{region kb-contextmenu-retrieve-clicked-item-when-opening-2}} public class ExtendedContextMenu : RadContextMenu { public static readonly DependencyProperty ClickedItemProperty = DependencyProperty.Register("ClickedItem", typeof(FrameworkElement), typeof(ExtendedContextMenu), new PropertyMetadata(null));

    public FrameworkElement ClickedItem
    {
        get { return (FrameworkElement)GetValue(ClickedItemProperty); }
        set { SetValue(ClickedItemProperty, value); }
    }

    protected override void OnOpened(RadRoutedEventArgs e)
    {
        base.OnOpened(e);

        this.ClickedItem = null;
        this.ClickedItem = this.GetClickedElement<TreeListViewRow>();
    }
}

{{endregion}}

[VB.NET] Retrieving the clicked TreeListViewRow instance inside the OnOpened method of the custom RadContextMenu

{{region kb-contextmenu-retrieve-clicked-item-when-opening-3}} Public Class ExtendedContextMenu Inherits RadContextMenu

    Public Shared ReadOnly ClickedItemProperty As DependencyProperty = DependencyProperty.Register("ClickedItem", GetType(FrameworkElement), GetType(ExtendedContextMenu), New PropertyMetadata(Nothing))

    Public Property ClickedItem As FrameworkElement
        Get
            Return CType(GetValue(ClickedItemProperty), FrameworkElement)
        End Get
        Set(ByVal value As FrameworkElement)
            SetValue(ClickedItemProperty, value)
        End Set
    End Property

    Protected Overrides Sub OnOpened(ByVal e As RadRoutedEventArgs)
        MyBase.OnOpened(e)
        Me.ClickedItem = Nothing
        Me.ClickedItem = Me.GetClickedElement(Of TreeListViewRow)()
    End Sub
End Class

{{endregion}}