public async void OnPostBookAsync() { DietSite.User u = SessionHelpers.GetObject <User>(HttpContext.Session, Constant.UserDetails); if (SessionHelpers.GetObject <bool>(HttpContext.Session, Constant.IsLoggedIn)) { DateTime slot = SessionHelpers.GetObject <DateTime>(HttpContext.Session, Constant.ParticularSlot); HttpContext.Session.Remove(Constant.ParticularSlot); int i = await _communicationService.CheckSlots(slot); if (i == 0) { message = "Book"; int x = await _communicationService.InsertSlots(u.UserID, slot); } else { message = "Not Available"; } } else { message = "Not Logged in"; } SessionHelpers.StoreObject(HttpContext.Session, Constant.Message, message); }