CgwMonitorManage.SmcError.SmcErr.SetErrorNo C# (CSharp) Method

        public void SetErrorNo(uint err)
        {
            ErrNo = err;
        }

        /// <summary>
        /// 刷新监控摄像头列表
        /// </summary>
        /// <returns></returns>
        public SmcErr RefreshMonitorCamera()
        {
            NLogEx.LoggerEx logEx = new NLogEx.LoggerEx(log);
            logEx.Trace("Enter: VideoMonitorManage.RefreshMonitorCamera.");
            SmcErr err = new SmcErr();

            //copy 一份，防止长时间占用锁
            Dictionary<string, IVideoMonitor> monitorsDictionaryTemp = null;

            if (this.monitorsOperateLock.TryEnterReadLock(CgwConst.ENTER_LOCK_WAIT_TIME))
            {
                try
                {
                    monitorsDictionaryTemp = new Dictionary<string, IVideoMonitor>(monitorsDictionary);
                }
                catch (Exception e)
                {
                    logEx.Error("RefreshMonitorCamera failed.Execption message:{0}", e.Message);
                }
                finally
                {
                    this.monitorsOperateLock.ExitReadLock();
                }
            }
            if (monitorsDictionaryTemp == null)
            {
                //记录日志，获取*监控平台的摄像头列表失败
                logEx.Error("RefreshMonitorCamera from monitor failed.No any monitor.");
                err.SetErrorNo(CgwError.ERR_REFRESH_MONITOR_CAMERA_FAIL);
                return err;
            }

            //循环已加载的所有的监控平台，将所有摄像头和分组组成一个list返回
            foreach (KeyValuePair<string, IVideoMonitor> monitor in monitorsDictionaryTemp)
            {
                IVideoMonitor videoMonitor = monitor.Value;
                err = videoMonitor.RefreshMonitorCamera();

                if (err.IsSuccess())
                {
                    logEx.Info("RefreshMonitorCamera success.");
                }
                else
                {
                    logEx.Error("RefreshMonitorCamera failed.");
                    err.SetErrorNo(CgwError.ERR_REFRESH_MONITOR_CAMERA_FAIL);
                    break;
                }
            }
            return err;
        }