public ThongTinSanPham(Model.SanPham sanPham, LoaiThucHien loaiThucHien = LoaiThucHien.NONE)
 {
     InitializeComponent();
     this.loaiThucHien = loaiThucHien;
     this.sanPham      = sanPham;
     btnThem.Click    += btnThem_Click;
     btnSua.Click     += btnSua_Click;
     chiaChuoiThongTin();
     HienThongTin();
     TrinhBayCacChucNang();
 }
 private void Ok()
 {
     if (loaiThucHien == LoaiThucHien.SUA)
     {
         AnHienCacThongTin(AN_THONG_TIN);
         loaiThucHien = LoaiThucHien.NONE;
         //  update();
         ButtonChiTiet();
     }
     else if (loaiThucHien == LoaiThucHien.THEM)
     {
         this.Close();
     }
 }
 private void btnSua_Click(object sender, EventArgs e)
 {
     loaiThucHien = LoaiThucHien.SUA;
     Sua();
 }
 //====================THEM XOA SUA================\\
 //SU KIEN NHAN BUTTON
 private void btnThem_Click(object sender, EventArgs e)
 {
     loaiThucHien = LoaiThucHien.THEM;
     Them();
 }