DDDContext db = new DDDContext();

            List<SelectListItem> selectlistDistrict = new List<SelectListItem>();

            foreach (var s in db.Department)

            {

                if (s.Name=="人事部")

                {

                    selectlistDistrict.Add(new SelectListItem()

                    {

                        Text = s.Id.ToString(),

                        Value = s.Name,

                        Selected = true

                    });

                }

                else

                {

                    selectlistDistrict.Add(new SelectListItem()

                    {

                        Text = s.Id.ToString(),

                        Value = s.Name,

                    });

                }

            }

            ViewBag.select = selectlistDistrict;

ViewBag.select =db.Department.select(c=>new SelectListItem(){

Value=c.ID,

Text=c.Name,

Selected=c.Name=="人事部"

});