public MResultModel DeleteClassInfo(DeleteModel inputM)
        {
            MResultModel resM;

            try
            {
                _classListBLL.DeleteClassInfo(inputM.ID);
                resM = MResultModel.GetSuccessResultM("删除成功");
            }
            catch (ArgumentNullException ex)
            {
                resM = MResultModel.GetFailResultM(ex.Message);
            }
            return(resM);
        }