public ActionResult DeleteRange(string classDateFrom, string classDateTo) {
     DateTime dFrom;
     DateTime dTo;
     ClassReport classReport = new ClassReport();
     classReport.ClassDateFrom = classDateFrom;
     classReport.ClassDateTo = classDateTo;
     bool dateFromOk = DateTime.TryParseExact(classDateFrom, "dd/MM/yyyy", CultureInfo.InvariantCulture, DateTimeStyles.None, out dFrom);
     bool dateToOk = DateTime.TryParseExact(classDateTo, "dd/MM/yyyy", CultureInfo.InvariantCulture, DateTimeStyles.None, out dTo);
     if (dateFromOk && dateToOk) {
         var bookings = db.MemberClassBookings.Where(bk => bk.GymClass.ClassDateTime >= dFrom && bk.GymClass.ClassDateTime <= dTo).ToList();
         db.MemberClassBookings.RemoveRange(bookings);
         var classes = db.GymClass.Where(bk => bk.ClassDateTime >= dFrom && bk.ClassDateTime <= dTo).ToList();
         db.GymClass.RemoveRange(classes);
         db.SaveChanges();
     }
     return RedirectToAction("Report", classReport);
 }
        public ActionResult Report(ClassReport classReport) {
            DateTime dFrom;
            DateTime dTo;
            DateTime dNow = DateTime.Now;

            bool dateFromOk = DateTime.TryParseExact(classReport.ClassDateFrom, "dd/MM/yyyy", CultureInfo.InvariantCulture, DateTimeStyles.None, out dFrom);
            bool dateToOk = DateTime.TryParseExact(classReport.ClassDateTo, "dd/MM/yyyy", CultureInfo.InvariantCulture, DateTimeStyles.None, out dTo);
            if (dateFromOk && dateToOk) {
                classReport.TotalAttended = db.MemberClassBookings.Where(bk => bk.Attended && bk.GymClass.ClassDateTime >= dFrom && bk.GymClass.ClassDateTime <= dTo).Count();
                classReport.TotalBookings = db.MemberClassBookings.Where(bk => !bk.Waiting && bk.GymClass.ClassDateTime >= dFrom && bk.GymClass.ClassDateTime <= dTo).Count();
                classReport.TotalWaitingList = db.MemberClassBookings.Where(bk => bk.Waiting && bk.GymClass.ClassDateTime >= dFrom && bk.GymClass.ClassDateTime <= dTo).Count();
                if (dFrom < dNow && dNow < dTo) {
                    dTo = dNow;
                }
                if (dFrom < dNow && dTo <= dNow){
                    classReport.NoShowMembers = NoShowList(dFrom, dTo);
                }
            }
            return View(classReport);
        }