protected void Luu_trang_thai_form()
    {
        FormDatHang form = new FormDatHang();

        form.cmbDiemSD = int.Parse(Request["cmbDiemSD"].ToString());
        form.lbSoTien  = Request["lbSoTien"].ToString();
        form.cmbHTKM   = int.Parse(Request["cmbHTKM"].ToString());
        form.cmbHTTT   = int.Parse(Request["cmbHTTT"].ToString());
        form.rdThe     = Request["rdThe"].ToString();

        if (form.rdThe == "rdKhac")
        {
            form.nodeLoaiThe = int.Parse(Request["nodeLoaiThe"].ToString());
            form.nodeSoThe   = Request["nodeSoThe"].ToString();
            form.nodeNgayHH  = int.Parse(Request["nodeNgayHH"].ToString());
            form.nodeThangHH = int.Parse(Request["nodeThangHH"].ToString());
            form.nodeNamHH   = int.Parse(Request["nodeNamHH"].ToString());
        }

        form.txtNguoiNhan  = Request["txtNguoiNhan"].ToString();
        form.txtDiaChiNhan = Request["txtDiaChiNhan"].ToString();
        form.cmbNgayGH     = int.Parse(Request["cmbNgayGH"].ToString());
        form.cmbThangGH    = int.Parse(Request["cmbThangGH"].ToString());
        form.cmbNamGH      = int.Parse(Request["cmbNamGH"].ToString());
        form.cmbGioGH      = int.Parse(Request["cmbGioGH"].ToString());
        form.cmbPhutGH     = int.Parse(Request["cmbPhutGH"].ToString());
        form.cmbBuoiGH     = int.Parse(Request["cmbBuoiGH"].ToString());

        Session["FormDatHang"] = form;
    }
    protected void Lay_trang_thai_form()
    {
        if (Session["FormDatHang"] != null)
        {
            FormDatHang form = (FormDatHang)Session["FormDatHang"];
            XL_THE      the  = new XL_THE("Goc");

            the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("cmbDiemSD", form.cmbDiemSD.ToString()));
            the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("lbSoTien", form.lbSoTien));
            the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("cmbHTKM", form.cmbHTKM.ToString()));
            the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("cmbHTTT", form.cmbHTTT.ToString()));
            the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("rdThe", form.rdThe));
            if (form.rdThe == "rdKhac")
            {
                the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("nodeLoaiThe", form.nodeLoaiThe.ToString()));
                the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("nodeSoThe", form.nodeSoThe));
                the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("nodeNgayHH", form.nodeNgayHH.ToString()));
                the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("nodeThangHH", form.nodeThangHH.ToString()));
                the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("nodeNamHH", form.nodeNamHH.ToString()));
            }
            the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("txtNguoiNhan", form.txtNguoiNhan));
            the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("txtDiaChiNhan", form.txtDiaChiNhan));
            the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("cmbNgayGH", form.cmbNgayGH.ToString()));
            the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("cmbThangGH", form.cmbThangGH.ToString()));
            the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("cmbNamGH", form.cmbNamGH.ToString()));
            the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("cmbGioGH", form.cmbGioGH.ToString()));
            the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("cmbPhutGH", form.cmbPhutGH.ToString()));
            the.Danh_sach_thuoc_tinh.Add(new XL_THUOC_TINH("cmbBuoiGH", form.cmbBuoiGH.ToString()));

            string chuoi = the.Chuoi();
            XL_CHUOI.XuatChuoi(Response, chuoi);
        }
    }
        private void ttmiDatHang_Click(object sender, EventArgs e)
        {
            FormDatHang frm = new FormDatHang();

            frm.MdiParent = this;
            frm.Show();
        }
 private void HienThiFormDatHang(string name)
 {
     if (!HienThiForm(name))
     {
         FormDatHang formDatHang = new FormDatHang();
         formDatHang.MdiParent = this;
         formDatHang.Show();
     }
 }