public static object GetMaxId() { string sConn = PlavyConfig.GetConnectionString("db"); SqlDb db = new SQLiteDb(sConn); var dbFactory = db.DbBuilder.DbFactory; var dbOperator = dbFactory.GetDbParamOperator(); var dblist = db.ExecuteScalar("select max(id) from tb_certs"); if (dblist == null) { return(-1); } return(dblist); }