public void Luuchitietdonhang(GioHang giohang, Shopbanhang db, string madh) { foreach (var item in giohang.getGiohang()) { CTDONHANG ctdh = new CTDONHANG(); ctdh.MADONHANG = madh; ctdh.MASP = item.sanpham.MASP; ctdh.SOLUONG = item.soluong; ctdh.THANHTIEN = item.Thanhtien; db.CTDONHANGs.Add(ctdh); db.SaveChanges(); } }