public ActionResult ThemPromotion(Promotion pro, PromotionDetail detail)
{
if (ModelState.IsValid)
{
QuanLy ql = new QuanLy();
ql.AddPromotion(pro, detail);
return(RedirectToAction("Promotion"));
}
ViewBag.IDPromo = new SelectList(__db.Promotions, "ID", "Name", pro.ID);
return(View(pro));
}
