C#采用FileSystemWatcher实现监视磁盘文件变更的方法

        {
            //watcher组
            FileSystemWatcher[] watchers;

 

            //若未传递参数,则监视所有文件系统,包括CD-ROM（不可用）,可移动磁盘（不可用）等
            if (args.Length == 0)
            {
                string[] drivers = Directory.GetLogicalDrives();
                watchers = new FileSystemWatcher[drivers.Length];

                for (int i = 0; i < drivers.Length; i++)
                {
                    try
                    {
                        watchers[i] = new FileSystemWatcher { Path = drivers[i] };
                    }
                    catch (Exception ex)
                    {
                        Trace.TraceWarning(ex.Message);
                    }
                }
            }
            else
            {
                watchers = new FileSystemWatcher[1];
                watchers[0] = new FileSystemWatcher { Path = args[0] };