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SchedulerDataStorage.AppointmentInserting Event

Allows you to cancel the insertion of an appointment.

Namespace: DevExpress.XtraScheduler

Assembly: DevExpress.XtraScheduler.v22.1.dll

NuGet Package: DevExpress.Win.Scheduler


public event PersistentObjectCancelEventHandler AppointmentInserting

Event Data

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

Property Description
Cancel Gets or sets whether to cancel the operation.
Object Gets the persistent object (appointment, resource or appointment dependency) for which the event occurs. Inherited from PersistentObjectEventArgs.


The AppointmentInserting event is raised before an appointment is added to the AppointmentBaseCollection collection and allows you to cancel the operation. The event parameter’s PersistentObjectEventArgs.Object property allows the processed appointment to be identified. To prevent it from being added, set the PersistentObjectCancelEventArgs.Cancel property to true.


Do not modify the appointment’s data source or data binding within this event handler. It results in the current appointment being disposed of, and consequently, an unhandled exception occurs.


The SchedulerDataStorage.AppointmentsInserted event is raised after the SchedulerDataStorage.AppointmentInserting event, when appointments are already in the storage and are saved to the external data source (if any). At the moment, you cannot prevent them from being saved.

To validate appointment insertion, you can get properties of the appointment being inserted by casting the e.Object parameter to the Appointment type. The following example adds a timestamp to the created appointment:

View Example

private void SchedulerStorage1_AppointmentInserting(object sender, PersistentObjectCancelEventArgs e) {
    if (((Appointment)e.Object).Start < DateTime.Now) e.Cancel = true;


You can use the SchedulerControl.InitNewAppointment event for appointment initialization.

See Also