private double TinhTongTien()
{
DataTable dtChiTiet = new DataTable();
dtChiTiet = chiTietQuangCaoBLL.LayDanhSachChiTietQuangCaoTheoMaPhieuDangKy(Int32.Parse(txtMaPhieuDangKy.Text.ToString()));
listIdLoaiQuangCao = chiTietQuangCaoBLL.LayDanhSachChiTietQuangCaoTheoMaPhieuDangKy(Int32.Parse(txtMaPhieuDangKy.Text.ToString())).AsEnumerable()
.Select(r => r.Field <int>("MaChiTietQuangCao"))
.ToList();
return(phieuDangKyBLL.TinhTongTien(listIdLoaiQuangCao, dtChiTiet, chiTietQuangCaoBLL));
}
