public ActionResult Index(vmInstructorSearch vm)
        {
            List<InstructorDetail> toreturn = new List<InstructorDetail>();
            IEnumerable<InstructorDetail> instructors = null;
            using (InstManager)
            {
                instructors = InstManager.GetAllTextbookDetails();
                if (vm.SelectedDept > 0)
                {
                    instructors = instructors.Where(inst => inst.DepartmentID == vm.SelectedDept);
                }
                if (!string.IsNullOrEmpty(vm.SearchText))
                {
                    instructors = instructors.Where(inst => inst.FullName.Contains(vm.SearchText));
                }

                JsonResult ret = Json(instructors.ToList());
                return ret;
            }
        }
 public ActionResult Index()
 {
     using (DeptManager)
     {
         var disp = new vmInstructorSearch();
         disp.Departments = DeptManager.GetAllDepartments().ToList();
         return View(disp);
     }
 }