PropertyGridControl.MenuOpening Event

Occurs when a user opens a property grid menu and allows you to customize this menu.

Namespace: DevExpress.Xpf.PropertyGrid

Assembly: DevExpress.Xpf.PropertyGrid.v24.2.dll

NuGet Package: DevExpress.Wpf.PropertyGrid

Declaration

C#

public event EventHandler<PropertyGridMenuEventArgs> MenuOpening

VB.NET

Public Event MenuOpening As EventHandler(Of PropertyGridMenuEventArgs)

Event Data

The MenuOpening event's data class is PropertyGridMenuEventArgs. The following properties provide information specific to this event:

Property	Description
Customizations	Gets a collection of menu customizations applied in this event handler.
Handled	Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs.
Items	Gets items displayed in the invoked menu.
Menu	Gets the invoked menu.
MenuType	Gets the invoked menu’s type.
OriginalSource	Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs.
RoutedEvent	Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs.
Row	Gets a property grid row. Inherited from PropertyGridRowBaseEventArgs.
Source	Gets the PropertyGridControl that raised the event.
TargetElement	Gets the UI element for which the menu is shown.
Value	Gets a row’s value. Inherited from PropertyGridRowBaseEventArgs.

The event data class exposes the following methods:

Method	Description
InvokeEventHandler(Delegate, Object)	When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation. Inherited from RoutedEventArgs.
OnSetSource(Object)	When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs.

Remarks

The following example adds tooltips to items displayed in the Issues collection’s new item menu:

View Example: Show Tooltips in the New Item Menu

XAML

<dxprg:PropertyGridControl x:Name="propertyGrid" ShowCategories="Hidden" MenuOpening="OnMenuOpening"/>

C#

using DevExpress.Xpf.Core;
using DevExpress.Xpf.PropertyGrid;
// ...
private void OnMenuOpening(object sender, PropertyGridMenuEventArgs e) {
    if (e.MenuType == PropertyGridMenuType.NewItem && e.Row.Path == "Issues") {
        e.Items[0].ToolTip = "Create a new breaking change.";
        e.Items[1].ToolTip = "Report a new bug.";
        e.Items[2].ToolTip = "Ask a new question.";
    }
}

VB.NET

Imports DevExpress.Xpf.Core
Imports DevExpress.Xpf.PropertyGrid
' ...
Private Sub OnMenuOpening(ByVal sender As Object, ByVal e As PropertyGridMenuEventArgs)
    If e.MenuType = PropertyGridMenuType.NewItem AndAlso Equals(e.Row.Path, "Issues") Then
        e.Items(0).ToolTip = "Create a new breaking change."
        e.Items(1).ToolTip = "Report a new bug."
        e.Items(2).ToolTip = "Ask a new question."
    End If
End Sub