public ActionResult AppointmentHistory(AppointmentSearchModel model)
        {
            model = model ?? new AppointmentSearchModel();
            var appoinments = _appointmentModel.GetAllByDoctorId(model.AppointmentStatus, model.LastDays).ToList();

            model.AppointmentCollection = appoinments.ToPagedList(model.Page, model.PageSize);
            return(View(model));
        }