public static void Main()
Console.WriteLine("Hello World");
String tensp = String.Empty;
String id = Request["id"];
SANPHAM s1 = new SANPHAM();
if (!String.IsNullOrEmpty(id))
s1 = XL_SANPHAM.XL_TimSanPham(int.Parse(id));
masp = int.Parse(Request["masp"]);
tensp = Request["tensp"];
giasp = int.Parse(Request["giasp"]);
SANPHAM sp = new SANPHAM();
bool isSua = XL_SANPHAM.XL_SuaSanPham(sp);
kq = "khong tim thay id de sua";
public static bool LT_SuaSanPham(SANPHAM s)
List<SANPHAM> ds = DocDanhSach();
for (int i = 0; i < ds.Count;i++)
if (ds[i].MaSP == s.MaSP) {