public ActionResult Datatuhuytour(string idhoadon, string tour, decimal?ppv, decimal?tygia, string tuyentq, string tungay, string denngay)
        {
            var hd = _huyhdvatRepository.GetByTwoKey(idhoadon, HttpContext.Session.GetString("chinhanh"));

            // tour = tour ?? _tour;
            ViewBag.tour    = tour;
            tuyentq         = tuyentq ?? "";
            tungay          = tungay ?? hd.ngayct.Value.ToString("dd/MM/yyyy");
            denngay         = denngay ?? hd.ngayct.Value.ToString("dd/MM/yyyy");
            ViewBag.tungay  = tungay;
            ViewBag.denngay = denngay;
            listDatatour(ViewBag.tour);
            Tkco("5113333336");
            Tkno("1311110000");
            ViewBag.chinhanh = HttpContext.Session.GetString("chinhanh");
            ViewBag.idhoadon = idhoadon;
            ViewBag.tuyentq  = tuyentq;
            ViewBag.ppv      = string.IsNullOrEmpty(ppv.ToString()) ? 0 : ppv;
            tygia            = string.IsNullOrEmpty(tygia.ToString()) ? 1 : tygia;
            ViewBag.tygia    = tygia;
            ViewBag.tuyentq  = tuyentq;
            if (string.IsNullOrEmpty(tour))
            {
                return(View("Datatuhuytour"));
            }
            var d = _huyhdvatRepository.listdatatuhuytour(tour, tungay, denngay, tuyentq, HttpContext.Session.GetString("chinhanh"));

            ViewBag.count = d.Count();
            if (d == null)
            {
                return(View("Datatuhuytour"));
            }
            else
            {
                return(View("Datatuhuytour", d));
            }
        }