private void hienthi()
        {
            string       macongty    = Session["congty"].ToString();
            string       manguoidung = Session["user"].ToString();
            List <Abcon> Captruoc    = AbconBUS.LayCapDuyetTruocCuaNhanVienTheoChiTiet(manguoidung);

            Abcon   capdangduyet = AbconBUS.LayCapDuyetCuaNhanVien(manguoidung);
            int     buoctruoc    = capdangduyet.Abstep - 1;
            string  nguoiduyet   = Session["user"].ToString();
            Busers2 suer         = UserBUS.TimNhanVienTheoMa(nguoiduyet, macongty);

            GridView2.DataSource = db.QryVanBanDenChuaDuyetTheoNguoiDuyet(manguoidung, buoctruoc);
            GridView2.DataBind();
            //string maphieu = row.Cells[1].Text;
            //Session["maphieu"] = maphieu;
        }