private void orderingList(orderingType type)
        {
            // ReportFile reportfile = new ReportFile("D:\\abcc.xls");
            int Rowindex = 3;

            if (list.Count >= 1)
            {
                if (type == orderingType.MaintenanceDate)
                {
                    list = (from c in list orderby c.MaintenanceDate ascending select c).ToList();
                }
                else
                {
                    list = (from c in list orderby c.Model ascending select c).ToList();
                }

                foreach (ReportFileColumns RFC in list)
                {
                    AppendToXlscell(reportfile, Rowindex, RFC);
                    Rowindex++;
                }
            }
            reportfile.setTitle(DateTime.Now);

            // textBox1.Text = "月报已生成.\r\n****************\r\n";
            // textBox1.Text += string.Format("路  径: {0};\r\n\r\n文件名: {1};", savePath, currentNa);
        }