public ActionResult ThanhToanThanhCong(ShopMyPham.Models.MailModel model)
        {
            if (ModelState.IsValid)
            {
                string to = model.To;
                string subject = model.Subject;
                string body = model.Body;
                MailMessage mail = new MailMessage();
                mail.To.Add(to);
                mail.Subject = subject;
                mail.Body = body;
                mail.From = new MailAddress("*****@*****.**");
                mail.IsBodyHtml = false;

                SmtpClient smtp = new SmtpClient("smtp.gmail.com");
                smtp.Port = 587;
                smtp.UseDefaultCredentials = true;
                smtp.EnableSsl = true;
                smtp.Credentials = new System.Net.NetworkCredential("*****@*****.**", "Thinh@@01636142697");
                smtp.Send(mail);
                ViewBag.message = "giui r";
                Session["GioHang"] = null;
                return RedirectToAction("ViewTrangChu", "TrangChu");
            }
            else
            {
                return View();
            }
        }
        public ActionResult GioHang(FormCollection frm, DonHang donhang, ShopMyPham.Models.MailModel model)
        {
            Session["NgayGiaoHang"] = DateTime.Parse(DateTime.Now.ToString("dd-MM-yyyy"));
            if (Session["MaKH"] == null)
            {
                return RedirectToAction("DangNhap", "DKDN");
            }
            else
            {
                if (ModelState.IsValid)
                {
                    donhang.MaKH = int.Parse(Session["MaKH"].ToString());
                    donhang.NgayDat = DateTime.Parse(DateTime.Now.ToString());
                    donhang.NgayGiao = DateTime.Parse(DateTime.Now.AddDays(+5).ToString("dd-MM-yyyy"));
                    donhang.TriGia = decimal.Parse(Session["TongTien1"].ToString());
                    bool a = false;
                    donhang.DaThanhToan = a;
                    donhang.TinhTrangGiaoHang = a;
                    donhang.TenNguoiNhan = frm["tennguoinhan"];
                    donhang.DienThoaiNhan = frm["dienthoainhanhang"];
                    donhang.DiaChiGH = frm["diachinhanhang"];
                    //donhang.Email = frm["email"];
                    db.DonHangs.Add(donhang);
                    db.SaveChanges();
                    Session["Madh"] = donhang.MaDonHang;
                    List<SanPhamGH> listSP = LayGioHang();
                    foreach (var item in listSP)
                    {
                        ChiTietDonHang ctdh = new ChiTietDonHang();
                        ctdh.MaDonHang = donhang.MaDonHang;
                        ctdh.MaNuocHoa = Convert.ToInt32(item.MaSP);
                        ctdh.SoLuong = item.SoLuong;
                        ctdh.DonGia = (decimal)item.GiaSP;
                        db.ChiTietDonHangs.Add(ctdh);
                        db.SaveChanges();
                    }

                    Session["GioHang"] = null;
                    return RedirectToAction("ThanhToanThanhCong", "GioHang");
                }
                else
                {
                    return RedirectToAction("DangkY", "DKDN");
                }
            }
        }