private void bbi_Turnover_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            int id = 0;

            if (this.gridView2.RowCount <= 0)
            {
                return;
            }
            id = ToolHelper.ConvertToInt(this.gridView2.GetFocusedRowCellValue("TURNOVERNO").ToString());
            if (id < 1)
            {
                MessageBox.Show("请选择需要提交的材料记录!", "提示信息");
                return;
            }
            else
            {
                DateTime          dt = DateTime.Now;
                BLL.STU_MATERIALS stumaterialsBll = new BLL.STU_MATERIALS();
                stumaterialsBll.Update(id, dt);
                refresh_Materials();
            }
        }