protected void LoadKhaosat()
        {
            BUSCauHoiKhaoSat BUSCauHoiKhaoSat = new BUSCauHoiKhaoSat();
            CAUHOIKHAOSAT CAUHOIKHAOSAT = new CAUHOIKHAOSAT();
            CAUHOIKHAOSAT = BUSCauHoiKhaoSat.layCauHoiKhongKhoa();
            MaCauHoi = CAUHOIKHAOSAT.MaCauHoiKhaoSat;
            if (CAUHOIKHAOSAT != null)
            {
                lbCauHoi.Text = CAUHOIKHAOSAT.NoiDung;

                BUSDapAnKhaoSat BUSDapAnKhaoSat = new BUSDapAnKhaoSat();
                List<DAPANKHAOSAT> listDA = new List<DAPANKHAOSAT>();
                listDA = BUSDapAnKhaoSat.layDapAnTheoMaCauHoi(CAUHOIKHAOSAT.MaCauHoiKhaoSat);

                rblistDanhSachDapAn.DataSource = listDA;
                rblistDanhSachDapAn.DataTextField = "NoiDung";
                rblistDanhSachDapAn.DataValueField = "MaDapAn";

                rblistDanhSachDapAn.DataBind();
            }
            else
            {
                rblistDanhSachDapAn.Visible = true;
                btSubmit.Visible = true;
            }

               // rblistDanhSachDapAn.Items[0].Selected = true;
        }