//MH_SUA_SP

​

Layout = null;

    List<SANPHAM> dsSanPham = new List<SANPHAM>();

    string chuoi = string.Empty;

    string maSP = string.Empty;

    string tenSP = string.Empty;

    string giaSP = string.Empty;

    string filePath = "E:\\IT\\VB2\\HK II\\KTLT\\Practice\\sanphamnhap.txt";

    if (IsPost)

    {

        maSP = int.Parse(Request["maSP"]);

        tenSP = Request["tenSP"];

        giaSP = int.Parse(Request["giaSP"]);

​

        XL_SANPHAM.Sua(maSP, tenSP, giaSP, filePath);

        dsSanPham = XL_SANPHAM.Doc(filePath, "");

    }

    dsSanPham = XL_SANPHAM.Doc(filePath, "");

​

//XL_SANPHAM

​

public static void Sua(int maSP, string tenSP, int giaSP, string filePath)

        {

            LT_SANPHAM.Sua(maSP, tenSP, giaSP, filePath);

        }

​

//LT_SANPHAM

​

public static void Sua(int maSP, string tenSP, int giaSP, string filePath)

        {

            List<SANPHAM> dsSanPham = Doc(filePath, "");

            for (int i = 0; i < dsSanPham.Count; i++)

            {

                if (dsSanPham[i].maSP == int.Parse(maSP))

                {

                    dsSanPham[i].maSP = maSP;

                    dsSanPham[i].tenSP = tenSP;

                    dsSanPham[i].giaSP = giaSP;

                }

                break;

            }

            GhiDe(dsSanPham, filePath);

        }

        public static void GhiDe(List<SANPHAM> dsSanPham, string filePath)

        {

            StreamWriter writer = new StreamWriter(filePath);

            foreach (var sp in dsSanPham)

            {

                writer.WriteLine($"{sp.maSP},{sp.tenSP},{sp.giaSP}");

            }

            writer.Close();

        }