// GET: NguoiBan/HoaDon_BanHang
        public ActionResult CapNhatTinhTrang()
        {
            var hdbh = db.HoaDon_BanHang.Include(p => p.TaiKhoan).ToList();

            var cnttvms = new List <CapNhatTinhTrangViewModel>();

            foreach (var item in hdbh)
            {
                CapNhatTinhTrangViewModel cnttvm = new CapNhatTinhTrangViewModel();
                cnttvm.HoaDon_BanHang    = item;
                cnttvm.DanhSachTrangThai = new List <SelectListItem>()
                {
                    new SelectListItem()
                    {
                        Text = "Đang chờ xử lý", Value = "1", Selected = (cnttvm.HoaDon_BanHang.TrangThai == 1)
                    },
                    new SelectListItem()
                    {
                        Text = "Đang giao hàng", Value = "2", Selected = (cnttvm.HoaDon_BanHang.TrangThai == 2)
                    },
                    new SelectListItem()
                    {
                        Text = "Đã hoàn tất", Value = "3", Selected = (cnttvm.HoaDon_BanHang.TrangThai == 3)
                    },
                    new SelectListItem()
                    {
                        Text = "Đã hủy", Value = "0", Selected = (cnttvm.HoaDon_BanHang.TrangThai == 0)
                    },
                };

                cnttvms.Add(cnttvm);
            }

            return(View(cnttvms));
        }
        public ActionResult CapNhatTinhTrang(IEnumerable <DanhSachTinhTrang> dstt)
        {
            foreach (var item in dstt)
            {
                HoaDon_BanHang hd = db.HoaDon_BanHang.Find(item.MaHDH);
                hd.TrangThai = item.TrangThai;

                db.Entry(hd).State = EntityState.Modified;
            }

            db.SaveChanges();
            ModelState.Clear();

            var hdbh = db.HoaDon_BanHang.Include(p => p.TaiKhoan).ToList();

            var cnttvms = new List <CapNhatTinhTrangViewModel>();

            foreach (var item in hdbh)
            {
                CapNhatTinhTrangViewModel cnttvm = new CapNhatTinhTrangViewModel();
                cnttvm.HoaDon_BanHang    = item;
                cnttvm.DanhSachTrangThai = new List <SelectListItem>()
                {
                    new SelectListItem()
                    {
                        Text = "Đang chờ xử lý", Value = "1", Selected = (cnttvm.HoaDon_BanHang.TrangThai == 1)
                    },
                    new SelectListItem()
                    {
                        Text = "Đang giao hàng", Value = "2", Selected = (cnttvm.HoaDon_BanHang.TrangThai == 2)
                    },
                    new SelectListItem()
                    {
                        Text = "Đã hoàn tất", Value = "3", Selected = (cnttvm.HoaDon_BanHang.TrangThai == 3)
                    },
                    new SelectListItem()
                    {
                        Text = "Đã hủy", Value = "0", Selected = (cnttvm.HoaDon_BanHang.TrangThai == 0)
                    },
                };

                cnttvms.Add(cnttvm);
            }

            return(View(cnttvms));
        }