public bool XoaHocKy_NamHoc(string maHK, string manamhoc)
        {
            HocKy_NamHocAccess hocky_namhoc = new HocKy_NamHocAccess();

            return(hocky_namhoc.XoaHocKy_NamHoc(maHK, manamhoc));
        }
        public bool SuaHocKy_namhoc(string mahocky, string manamhoc)
        {
            HocKy_NamHocAccess hocky_namhoc = new HocKy_NamHocAccess();

            return(hocky_namhoc.SuaHocKy_Namhoc(mahocky, manamhoc));
        }
        public List <HocKy_NamHoc> GetListHocKy_NamHoc()
        {
            HocKy_NamHocAccess hocky_namhoc = new HocKy_NamHocAccess();

            return(hocky_namhoc.GetAllHocKy_NamHoc());
        }