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The OnClientAppointmentInserting client-side event is called before an appointment is inserted.

Two parameters are passed to the event handler:

  • sender is the scheduler client object.

  • eventArgs has the following methods:

  • get_startTime() returns the starting date and time for the appointment.

  • get_targetSlot() returns the Time Slot at which the appointment is being inserted.

  • get_isAllDay() returns True if the inserted appointment defaults to anall-day event (as in Month View), or False if the new appointment starts at the time returned by get_startTime().

  • set_cancel() lets you permit or block the insertion of the appointment.Calling set_cancel(true) stops the insertion, while set_cancel(false) allowsthe scheduler to bring up an edit form or in-line editor for the appointment.


This example prevents the user from inserting appointments that have already happened:

<script type="text/javascript">   
function OnClientAppointmentInserting(sender, eventArgs)
     var now = new Date();
     if (eventArgs.get_startTime() < now)
 DataSourceID="AppointmentsDS" /> 

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