CgwMonitorManage.VideoMonitor.VideoMonitorManage.CreateMonitor C# (CSharp) Method

        private SmcErr CreateMonitor(string monitorId, string className, out IVideoMonitor videoMonitor)
        {
            NLogEx.LoggerEx logEx = new NLogEx.LoggerEx(log);
            logEx.Trace("Enter: VideoMonitorManage.CreateMonitor().");
            SmcErr err = new CgwError();
            videoMonitor = null;
            if (this.monitorsOperateLock.TryEnterWriteLock(CgwConst.ENTER_LOCK_WAIT_TIME))
            {
                try
                {
                    if (monitorsDictionary.ContainsKey(monitorId))
                    {
                        //监控平台的id重复
                        err.SetErrorNo(CgwError.MONITOR_CONFIG_FILE_INVALID_ID_EXIST);
                        logEx.Error("Monitor id has been exist. Monitor id:{0}.", monitorId);
                        return err;
                    }
                }
                catch (Exception e)
                {
                    logEx.Error("CreateMonitor failed..Execption message:{0}", e.Message);
                }
                finally
                {
                    this.monitorsOperateLock.ExitWriteLock();
                }
            }

            Type monitorType = Type.GetType(className);
            if (monitorType == null)
            {
                //class不合法
                err.SetErrorNo(CgwError.MONITOR_CONFIG_FILE_INVALID_CLASS_INVALID);
                logEx.Error("The class of Monitor is invalid. Class:{0}, Monitor id:{1}.", className, monitorId);
                return err;
            }

            try
            {
                //create instance
                logEx.Info("VideoMonitorManage.className = {0}", className);

                if (className == "CgwMonitorManage.eLTE.eLTEVideoMonitor,CgwMonitorManage.eLTE")
                {
                    //eLTE dll放在eLTeSDK目录下，否则跟ivs DLL冲突
                    string strPath = System.AppDomain.CurrentDomain.BaseDirectory;
                    System.Reflection.Assembly assembly = System.Reflection.Assembly.LoadFrom(strPath + @"eLTeSDK\CgwMonitorManage.eLTE.dll");
                    Type[] types = assembly.GetTypes();

                    if (types.Length > 0)
                    {
                        monitorType = types.First((x) => x.FullName == "CgwMonitorManage.eLTE.eLTEVideoMonitor");
                    }
                }
                else if (className == "CgwMonitorManage.Ivs.IvsVideoMonitor,CgwMonitorManage.Ivs")
                {
                    string strPath = System.AppDomain.CurrentDomain.BaseDirectory;
                    System.Reflection.Assembly assembly = System.Reflection.Assembly.LoadFrom(strPath + @"IVSSDK\CgwMonitorManage.Ivs.dll");
                    Type[] types = assembly.GetTypes();
                    if (types.Length > 0)
                    {
                        monitorType = types.First((x) => x.FullName == "CgwMonitorManage.Ivs.IvsVideoMonitor");
                    }
                }
                logEx.Info("VideoMonitorManage.monitorType = {0}", monitorType);
                videoMonitor = Activator.CreateInstance(monitorType) as CgwMonitorManage.Common.IVideoMonitor;
            }
            catch (Exception e)
            {
                //无法加载指定的类
                err.SetErrorNo(CgwError.MONITOR_CONFIG_FILE_INVALID_CLASS_INVALID);
                logEx.Error("The class of Monitor is invalid. May be not as IVideoMonitor. Class:{0}, Monitor id:{1},Exception message:{2}.",
                             className, monitorId, e.Message);
                return err;
            }

            if (videoMonitor == null)
            {
                //无法加载指定的类
                err.SetErrorNo(CgwError.MONITOR_CONFIG_FILE_INVALID_CLASS_INVALID);
                logEx.Error("The class of Monitor is invalid. May be not as IVideoMonitor. Class:{0}, Monitor id:{1}.", className, monitorId);
                return err;
            }

            return err;
        }