public override int Delete() { _model.code = txtcode.Text; if (_bll.Exists_isDel(_model.code)) { MessageBox.Show("配料单已经领取,不允许删除"); return(0); } result = _bll.Delete(this.Name, _model.code); if (result == false) { MessageBox.Show("删除失败"); } else { controlClear(); } return(base.Delete()); }