I have radscheduler control which has its server side appointment click event. In some situations I have to set whole radscheduler as read only mode. During read only mode when I click on any appintment page posts back and appointment click event is called. Appointment edit form is not opening as it is read only that is correct but it post back to server side . How to avoid it so that It cant go to execute server side appointment click event in read only mode of scheduler ? I have tried OnClientAppointmentClick event of radscheduler but there is not method to cancel server side click event from client side. What should I do ?