FIleSystemWatcher 对媒体文件的上次访问(读取)不起作用
我正在将媒体内容传送到客户端系统(从互联网下载),并想确认媒体文件是否已被操作员打开(和查看)。 我正在使用文件系统观察程序(C# 3.5)来检查文件的上次访问时间(因此每当播放媒体文件时我都应该收到该事件)并发送确认。
我已在 Windows 7 计算机的注册表中启用了上次访问时间 此处并重新启动了我的系统。文件系统观察器在打开的目录上触发事件,但不在媒体播放时触发事件。
这是我的代码:
private FileSystemWatcher fsWatcher = null;
private static Object objLock = new Object();
private void StartAccessWatcher(string _folderPath)
{
fsWatcher = new FileSystemWatcher(_folderPath, "*.*");
fsWatcher.Changed += new FileSystemEventHandler(fsWatcher_Changed);
fsWatcher.IncludeSubdirectories = true;
fsWatcher.NotifyFilter = NotifyFilters.LastAccess;
fsWatcher.EnableRaisingEvents = true;
}
private void fsWatcher_Changed(object sender, FileSystemEventArgs e)
{
lock (objLock)
{
fsWatcher.EnableRaisingEvents = false;
DisplayMessage(string.Concat(e.ChangeType, " ", e.FullPath));
fsWatcher.EnableRaisingEvents = true;
}
}
private void btn_StartWatcher_Click(object sender, EventArgs e)
{
StartAccessWatcher(@"E:\Surewaves\Media-Store\MP1 Videos");
}
您还可以从此处下载我的代码示例。
请告诉我怎样才能最好地实现它?我需要获取最后一次访问时间(任何播放器播放视频、音频、图像或 .swf 文件时)?
I am delivering media contents to a client system (download from internet) and want to acknowledge if the media file was opened (and viewed) by the operator.
I am using a file system watcher (C# 3.5) to check for the last access time of file (so whenever the media file is played I should get the event) and I send an acknowledgement.
I have enabled the last access time in registry of my Windows 7 machine here and rebooted my system. File system watcher fires events on directory opened but not on media play.
Here is my code :
private FileSystemWatcher fsWatcher = null;
private static Object objLock = new Object();
private void StartAccessWatcher(string _folderPath)
{
fsWatcher = new FileSystemWatcher(_folderPath, "*.*");
fsWatcher.Changed += new FileSystemEventHandler(fsWatcher_Changed);
fsWatcher.IncludeSubdirectories = true;
fsWatcher.NotifyFilter = NotifyFilters.LastAccess;
fsWatcher.EnableRaisingEvents = true;
}
private void fsWatcher_Changed(object sender, FileSystemEventArgs e)
{
lock (objLock)
{
fsWatcher.EnableRaisingEvents = false;
DisplayMessage(string.Concat(e.ChangeType, " ", e.FullPath));
fsWatcher.EnableRaisingEvents = true;
}
}
private void btn_StartWatcher_Click(object sender, EventArgs e)
{
StartAccessWatcher(@"E:\Surewaves\Media-Store\MP1 Videos");
}
You may also download my code sample from here.
Please tell me how best can I achieve it ? I need to get the the last access time (when ever the video or audio or image or .swf file was played by any player) ?
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作为对这个三年前问题的更新,给出的代码现在可以正常工作*,可以在本地计算机上播放视频。
计算机必须使用
问题中所述的以下命令成功启用lastAccess。
*- 在撰写本文时,使用 Windows Server 2012 R2
As an update to this three year old question, the code given works correctly now* with videos played on the local machine.
The machine must have lastAccess successfully enabled with the following command
as noted in the question.
*- at the time of this post, using Windows Server 2012 R2
FileSystemWatcher 用于监视指定目录中的更改。您可以监视指定目录的文件和子目录的变化。在您的情况下,媒体文件没有发生任何更改。我建议尝试扩展 FileSystemWatcher 类并为媒体文件读取创建新事件,然后触发这些事件。
The FileSystemWatcher is used to watch for changes in a specified directory. You can watch for changes in files and subdirectories of the specified directory. In your case there is no change being made on media files. I would suggest try extending FileSystemWatcher class and create new events for media file reading and then fire those events.