SchedulerControl.AppointmentRemoving Event

Occurs before the user has deleted appointments from the scheduler.

Namespace: DevExpress.Xpf.Scheduling

Assembly: DevExpress.Xpf.Scheduling.v20.2.dll

NuGet Packages: DevExpress.WindowsDesktop.Wpf.Scheduling, DevExpress.Wpf.Scheduling

Declaration

C#

public event AppointmentRemovingEventHandler AppointmentRemoving

VB.NET

Public Event AppointmentRemoving As AppointmentRemovingEventHandler

Event Data

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

Property	Description
Appointments	Returns the collection of appointments that are to be deleted.
Cancel	Gets or sets whether the event should be canceled. Inherited from CancelRoutedEventArgs.
CanceledAppointments	Provides access to the collection of appointments that should be excluded from being deleted.
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.
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.
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

To prevent specific appointments from being deleted, add them to the CanceledAppointments collection. If you want to implement a custom appointment removal functionality, set the event’s Cancel property to true to disable the default mechanism.

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the AppointmentRemoving event.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

scheduler-crud-events/CS/Behaviors/SchedulerControlEditingBehavior.cs#L90

base.OnAttached();
AssociatedObject.AppointmentRemoving += AssociatedObject_AppointmentRemoving;
AssociatedObject.AppointmentEditing += AssociatedObject_AppointmentEditing;

VB.NET

scheduler-crud-events/VB/Behaviors/SchedulerControlEditingBehavior.vb#L96

MyBase.OnAttached()
AddHandler AssociatedObject.AppointmentRemoving, AddressOf AssociatedObject_AppointmentRemoving
AddHandler AssociatedObject.AppointmentEditing, AddressOf AssociatedObject_AppointmentEditing