wpf-devexpress-dot-xpf-dot-navbar-dot-navbarviewbase-6a5b8237.md
Fires before an item is selected.
Namespace : DevExpress.Xpf.NavBar
Assembly : DevExpress.Xpf.NavBar.v25.2.dll
NuGet Package : DevExpress.Wpf.NavBar
public event NavBarItemSelectingEventHandler ItemSelecting
Public Event ItemSelecting As NavBarItemSelectingEventHandler
The ItemSelecting event's data class is NavBarItemSelectingEventArgs. 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 containing an item that is going to be selected. |
| NewItem | Gets an item object that is going to be selected. |
| 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 group containing the previously selected item. |
| PrevItem | Gets the previously selected item. |
| 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. |
The ItemSelecting event occurs when an item is going to be selected within the NavBarControl. This event allows you to cancel item selection, if required.
To learn more, see the Clicking and Selecting Items topic.
See Also