NavBarViewBase.ActiveGroupChanging Event

Fires before the active group is changed.

Assembly : DevExpress.Xpf.NavBar.v25.2.dll

NuGet Package : DevExpress.Wpf.NavBar

Declaration

C#
VB.NET

csharp

public event NavBarActiveGroupChangingEventHandler ActiveGroupChanging

Public Event ActiveGroupChanging As NavBarActiveGroupChangingEventHandler

Event Data

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

Property	Description
Cancel	Gets or sets a value indicating whether the operation which raised an event should be canceled.
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.
NewGroup	Gets a group object that is going to be activated.
OriginalSource	Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs.
PrevGroup	Gets the previously activated group.
RoutedEvent	Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs.
Source	Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs.

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 ActiveGroupChanging event occurs when the active group is going to be changed within the NavBarControl. This event allows you to cancel active group changing, if required.