public static void C9Tp_SaveExcel() { string sql = "select * from Trip"; accessdb = new AccessDbClass(MyMeans.strConn1); DataTable a = accessdb.SelectToDataTable(sql); DataTable dt = a; string outError = ""; DateTime dtime = DateTime.Now; string fileName = Application.StartupPath + "\\EDC7 TripRecorder\\" + DateTime.Now.ToString("yyyyMMddhhmmss") + " tp.xls"; AsposeExcelTools.Tp_DataTableToExcel(dt, fileName, out outError); if (!string.IsNullOrEmpty(outError)) { MessageBox.Show(outError); } else { Process.Start(fileName); } }