วิธีดึงค่าจาก DropDownList ส่งเข้าไปเก็บใน Javascript แล้วส่งกลับไปที่ Controllers เพื่อบันทึกลงฐานข้อมูล

private UBADBEntities db = new UBADBEntities();

        //
        // GET: /Application/

        public ActionResult Index()
        {
            Application apps = new Application();
            var applications = db.Applications.Include("Position").Include("Position1");
            ViewBag.Pos1 = new SelectList(db.Positions, "posID", "posName", apps.Pos1);
            ViewBag.Pos2 = new SelectList(db.Positions, "posID", "posName", apps.Pos2);
            return View(applications);
        }

        [HttpPost]
        public ActionResult Index(int id, string firstName, string lastName, int firstPosition, int secondPosition, string nickName)
        {
            var applicationQuery =
                from app in db.Applications
                where app.CandidateID == id
                select app;

            ViewBag.Pos1 = new SelectList(db.Positions, "posID", "posName");
            ViewBag.Pos2 = new SelectList(db.Positions, "posID", "posName");

            foreach (var application in applicationQuery)
            {
                if (application.CandidateID == id)
                {
                    application.Pos1 = firstPosition;
                    application.Pos2 = secondPosition;
                    application.FirstName = firstName.ToString();
                    application.LastName = lastName.ToString();
                    application.NickName = nickName.ToString();
                }
            }

            db.SaveChanges();
            return View(db.Applications.ToList());
        }

<script type="text/javascript">
        function ShowEditButton(par) {
            $("#firstName-" + par).attr("class", "invisible")
            $("#txtFirstName-" + par).attr("class", "show")
            $("#lastName-" + par).attr("class", "invisible")
            $("#txtLastName-" + par).attr("class", "show")
            $("#firstPosition-" + par).attr("class", "hide")
            $("#ddlPos1-" + par).attr("class", "show")
            $("#secondPosition-" + par).attr("class", "hide")
            $("#ddlPos2-" + par).attr("class", "show")
            $("#nickName-" + par).attr("class", "invisible")
            $("#txtNickName-" + par).attr("class", "show")
            $("#btnEdit-" + par).attr("class", "btn-toolbar text-center btn-group btn hide")
            $("#btnSave-" + par).attr("class", "btn-toolbar text-center btn-group btn show")
        };
        function SaveEditButton(par) {
            $("#firstName-" + par).attr("class", "show")
            $("#txtFirtsName-" + par).attr("class", "invisible")
            $("#lastName-" + par).attr("class", "show")
            $("#txtLastName-" + par).attr("class", "invisible")
            $("#firstPosition-" + par).attr("class", "show")
            $("#ddlPos1-" + par).attr("class", "hide")
            $("#secondPosition-" + par).attr("class", "show")
            $("#ddlPos2-" + par).attr("class", "hide")
            $("#nickName-" + par).attr("class", "show")
            $("#txtNickName-" + par).attr("class", "invisible")
            $("#btnEdit-" + par).attr("class", "btn-toolbar text-center btn-group btn show")
            $("#btnSave-" + par).attr("class", "btn-toolbar text-center btn-group btn hide")

            var _firstName = $("#txtFirstName-" + par).val();
            var _lastName = $("#txtLastName-" + par).val();
            var _firstPosition = $("#ddlPos1-" + par).val();
            var _secondPosition = $("#ddlPos2-" + par).val();
            var _nickName = $("#txtNickName-" + par).val();
            var url = '@Url.Action("Index","Application")';
            $.post(url, { id: par, firstName: _firstName, lastName: _lastName, firstPosition: _firstPosition, secondPosition: _secondPosition, nickName: _nickName }, function (data) {
                alert(par)
                alert(_firstName)
                alert(_lastName)
                alert(_firstPosition)
                alert(_secondPosition)
                alert(_nickName)
                $("#divResult").html(data);
            });
        };
    </script>