CgwMonitorManage.Tiandy.TiandyVideoMonitor.GetAllCameras C# (CSharp) Method

        public SmcErr GetAllCameras(out List<Camera> cameraList, out List<CameraGroup> groupList, out List<NodeRelation> nodeRelationListT)
        {
            monitorManageServiceGetCameraList.Stop();
            isGetDevicesFinish = false;

            NLogEx.LoggerEx logEx = new NLogEx.LoggerEx(log);
            logEx.Trace("Enter: TiandyVideoMonitor.GetAllCameras().");
            SmcErr err = new CgwError();
            cameraList = new List<Camera>();
            groupList = new List<CameraGroup>();
            nodeRelationListT = new List<NodeRelation>();

            if (this.cameraOperateLock.TryEnterReadLock(CgwConst.ENTER_LOCK_WAIT_TIME))
            {
                try
                {
                    #region 深度克隆数据
                    foreach (KeyValuePair<string, TiandyCamera> tiandyCameraKeyValue in this.tiandyCameraDictionary)
                    {
                        TiandyCamera tiandyCamera = tiandyCameraKeyValue.Value;
                        //从缓存获取
                        Camera camera = new Camera(tiandyCamera.No, tiandyCamera.Name);
                        cameraList.Add(camera);
                    }
                    foreach (KeyValuePair<string, CameraGroup> groupDicKeyValue in this.groupDic)
                    {
                        CameraGroup cameraGroupTemp = new CameraGroup(groupDicKeyValue.Value.No, groupDicKeyValue.Value.Name);
                        groupList.Add(cameraGroupTemp);
                    }

                    foreach (NodeRelation nodeRelation in this.nodeRelationList)
                    {
                        NodeRelation nodeRelationTemp = new NodeRelation(nodeRelation.No,
                                                                          nodeRelation.Path,
                                                                          nodeRelation.Type);
                        nodeRelationListT.Add(nodeRelationTemp);
                    }
                    #endregion
                }
                catch (Exception e)
                {
                    err.SetErrorNo(CgwError.GET_ALL_CAMERAS_FAILED);
                    logEx.Error("Get all cameras failed.Execption message:{0}", e.Message);
                    return err;
                }
                finally
                {
                    this.cameraOperateLock.ExitReadLock();
                }
            }
            monitorManageServiceGetCameraList.Start();
            logEx.Info("Get all cameras success.");
            return err;
        }