问“WareHouse”的“”ModifiedOn“”属性无法设置为“”DateTime“”值。“”必须将此属性设置为'String‘类型的非null值

EN

namespace CalcoWOMS.Controllers
{ 
    public class AdminController : Controller
    {
        private WOMSEntities db = new WOMSEntities();

        public ViewResult WareHouseIndex()
        {
            return View(db.WareHouse.ToList());
        }



        public ViewResult WareHouseDetails(int id)
        {
            WareHouse wareHouse = db.WareHouse.Single(m => m.ID == id);
            return View(wareHouse);
        }

        public ActionResult WareHouseCreate()
        {
            return View();
        }


        [HttpPost]
        public ActionResult Create(WareHouse wareHouse)
        {
            if (ModelState.IsValid)
            {
                db.WareHouse.AddObject(wareHouse);
                db.SaveChanges();
                return RedirectToAction("WareHouseIndex");
            }

            return View(wareHouse);
        }

        //
        // GET: /Admin/Edit/5

        public ActionResult WareHouseEdit(int id)
        {
            WareHouse wareHouse = db.WareHouse.Single(m => m.ID == id);
            return View(wareHouse);
        }



        [HttpPost]
        public ActionResult WareHouseEdit(WareHouse wareHouse)
        {
            if (ModelState.IsValid)
            {
                db.WareHouse.Attach(wareHouse);
                db.ObjectStateManager.ChangeObjectState(wareHouse, EntityState.Modified);
                db.SaveChanges();
                return RedirectToAction("WareHouseIndex");
            }
            return View(wareHouse);
        }

        //
        // GET: /Admin/Delete/5

        public ActionResult WareHouseDelete(int id)
        {
            WareHouse wareHouse = db.WareHouse.Single(m => m.ID == id);
            return View(wareHouse);
        }


        [HttpPost, ActionName("WareHouseDelete")]
        public ActionResult WareHouseDeleteConfirmed(int id)
        {
            WareHouse wareHouse = db.WareHouse.Single(m => m.ID == id);
            db.WareHouse.DeleteObject(wareHouse);
            db.SaveChanges();
            return RedirectToAction("WareHouseIndex");
        }
    }
}