private void AddDonHangToDB(DataRowView dr, int dhid, int chid, string tench) { ChiTietDonHang ctdh = new ChiTietDonHang(); ctdh.InsertFields(dhid, int.Parse(dr["SanPhamID"].ToString()), dr["TenSanPham"].ToString(), decimal.Parse(dr["GiaSanPham"].ToString()), int.Parse(dr["SoSanPham"].ToString()), decimal.Parse(dr["TongTien"].ToString()), chid, tench); }