private void ltDonHang_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            var item = (sender as ListView).SelectedItem;

            if (item != null)
            {
                DonHangHienThi temp = (DonHangHienThi)ltDonHang.SelectedItem;
                IDofItemSelected = temp.ID;
                NavigationService.Navigate(new TrangHoaDon());
            }
        }
        public void LoadListView()
        {
            MyDatabaseEntities db = new MyDatabaseEntities();

            foreach (var value in db.DonHangs.ToList())
            {
                DonHangHienThi x = new DonHangHienThi();


                if (value.TinhTrang == 0)
                {
                    x.TinhTrang = new BitmapImage(new Uri(@"images/cancel-button.png", UriKind.Relative));
                }
                else
                {
                    x.TinhTrang = new BitmapImage(new Uri(@"images/checking-mark-circle.png", UriKind.Relative));
                }

                if (value.LoaiThanhDon == 0)
                {
                    x.LoaiDonHang = new BitmapImage(new Uri(@"images/online-shopping-cart.png", UriKind.Relative));
                }
                else if (value.LoaiThanhDon == 1)
                {
                    x.LoaiDonHang = new BitmapImage(new Uri(@"images/delivery-truck.png", UriKind.Relative));
                }
                else
                {
                    x.LoaiDonHang = new BitmapImage(new Uri(@"images/coins.png", UriKind.Relative));
                }

                if (value.KhachHang_CMND != null)
                {
                    x.CMND       = value.KhachHang_CMND;
                    x.HoTen      = value.KhachHang.HoTen;
                    x.SDT        = value.KhachHang.SDT;
                    x.DiaChi     = value.KhachHang.DiaChi;
                    x.TienConLai = string.Format("{0:0,0}", value.TienConLaiPhaiTra);
                }
                else
                {
                    x.TienConLai = "0";
                }
                x.ID       = value.ID;
                x.Ngay     = (DateTime)value.NgayTao;
                x.TongTien = string.Format("{0:0,0}", value.TongGiaTriBan);


                ListDHHT.data.Add(x);
            }

            ltDonHang.ItemsSource = ListDHHT.data;
        }