Hi Kesavan,
Thanks for evaluating Syncfusion products.
We have created sample for Adding and editing the appointments in Schedule control using JavaScript without page refreshing. We have ClientSideOnScheduleClick, ClientSideOnAppointmentClick through this we can do this.
Please refer the below sample which illustrate this
http://websamples.syncfusion.com/samples/Schedule.Web/5.2.0.25/P39561/main.htmWhen we click the schedule control it popup the Add new appointment details to enter, after enter if you give add new, then it will add new appointment in the schedule control without page refreshing.
Please take a look into this sample and let me know if this helps you.
Best Regards,
Bhuvana