public ActionResult SeeVolunteersSignedUp(int eventID)
        {
            VolunteersDBEntities _db = new VolunteersDBEntities();
            var volunteerList        = _db.VolunteersSignedUp(eventID);

            if (volunteerList.FirstOrDefault().FirstName == null)
            {
                throw new Exception();
            }

            Models.AdminCalVolunteerPerEventPartialModel Model = new Models.AdminCalVolunteerPerEventPartialModel
            {
                event_ID   = eventID,
                volunteers = volunteerList
            };

            return(PartialView("AdminCalVolunteerPerEventPartial", Model));
        }