public Result <List <SinhVienCbx_ett> > selectAllSinhVienCbx()
        {
            SinhVien_ctrl temp = new SinhVien_ctrl();

            return(temp.select_all_sinhvien_cbx());
        }
        public Result <bool> editSinhVien(string ma, string ten, string ns, string mk)
        {
            SinhVien_ctrl temp = new SinhVien_ctrl();

            return(temp.edit_sinhvien(ma, ten, ns, mk));
        }
        public Result <bool> insertSinhVien(string ma, string ten, string ns, string mk)
        {
            SinhVien_ctrl temp = new SinhVien_ctrl();

            return(temp.insert_sinhvien(new SinhVien_ett(ma, ten, ns, mk)));
        }
        public Result <bool> deleteSinhVien(string ma)
        {
            SinhVien_ctrl temp = new SinhVien_ctrl();

            return(temp.delete_sinhvien(ma));
        }
        public Result <List <SinhVien_ett> > selectByFieldsSinhVien(string inputName, string how)
        {
            SinhVien_ctrl temp = new SinhVien_ctrl();

            return(temp.select_by_fields(inputName, how));
        }