The AppointmentInsert event occurs when an appointment is about to be inserted in the data source.
AppointmentInsert has two parameters:
sender is the scheduler control.
e is an object of type SchedulerCancelEventArgs.
It has two properties:
Appointment is the appointment that is about to be inserted.
You can modify this object to change the data that is sent to the data source.
Cancel is a boolean value that lets you prevent the insertion.
protected void RadScheduler1_AppointmentInsert(object sender, SchedulerCancelEventArgs e)
if (e.Appointment.Subject == String.Empty)
e.Cancel = true;
Protected Sub RadScheduler1_AppointmentInsert(ByVal sender As Object, _
ByVal e As SchedulerCancelEventArgs) Handles RadScheduler1.AppointmentInsert
If e.Appointment.Subject = String.Empty Then
e.Cancel = True