Hi Pradeep_kk23,
For event calender for web forms you can try for the following threads and the data is also saved in db.
http://www.c-sharpcorner.com/UploadFile/sd_patel/ASPNetCalendarControl11222005054337AM/ASPNetCalendarControl.aspx
http://blog.scheduler-net.com/post/2012/04/03/simple-event-calendar-asp-net.aspx
http://www.4guysfromrolla.com/articles/041603-1.aspx
Here you go, following thread shows how user can add events in the calender by just clicking add button and updating the calender.
http://highoncoding.com/Articles/232_Creating_an_Event_Calendar.aspx
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