using( Workbook wb=new HSSFWorkbook(fs))

                     {

                        Sheet sheet= wb.GetSheetAt(0);

                       

                        string title1 = sheet.GetRow(0).GetCell(0).StringCellValue;

                        string title2 = sheet.GetRow(0).GetCell(1).StringCellValue;

                        string title3 = sheet.GetRow(0).GetCell(2).StringCellValue;

                        string title4 = sheet.GetRow(0).GetCell(3).StringCellValue;

                        string sql = null;

                        string homephone = null;

                        string carnum = null;

                        string carenginnum = null;

                         int rowsnum=0;

                        DateTime buytime;

                        if (title1 == "固定电话" && title2 == "车号" && title3 == "车架号" && title4 == "购买时间")

                        {