4

伙计们可以告诉我为什么我有这样的错误....

2013-08-11 18:44:28 - NPMessage: DEBUG: Dispatching a RPCStorageWriteUserFileMessage
2013-08-11 18:44:28 - RPCStorageWriteUserFileMessage: INFO: Got a request for writing 8192 bytes to file iw4.stat for user alhpons.
2013-08-11 18:44:28 - ProfileData: INFO: Handling profile update request for alhpons
2013-08-11 18:44:28 - ProfileData: ERROR: Exception: System.IO.IOException: The process cannot access the file 'D:\IW4M\NpServer\data\priv2\00\000\alhpons\iw4.stat' because it is being used by another process.
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
   at System.IO.File.ReadAllBytes(String path)
   at NPx.ProfileData.Handle(UpdateRequest request)
   at NPx.ProfileData.Run()

编辑:

我在 windows server 2008 上使用我的应用程序,一些文件需要为我的应用程序读取/写入权限,但我有这样的错误,所以我需要解决这个问题,我的来源是:

public override void Process(NPHandler client)
    {
        var fileName = Message.fileName;
        var fileData = Message.fileData;
        var npid = (long)Message.npid;
        var fsFile = StorageUtils.GetFilename(fileName, npid);

        _client = client;
        _fileName = fileName;
        _npid = npid;

        if (!client.Authenticated)
        {
            ReplyWithError(1);
            return;
        }

        if (client.NPID != (long)npid)
        {
            ReplyWithError(1);
            return;
        }

        if (!Directory.Exists(Path.GetDirectoryName(fsFile)))
        {
            Directory.CreateDirectory(Path.GetDirectoryName(fsFile));
        }

        // are we allowed to write this type of file?
        if (!_fileHooks.ContainsKey(fileName))
        {
            ReplyWithError(1);
            return;
        }

        string backupFile = null;

        int result = _fileHooks[fileName](fileData, fsFile, out backupFile);

        if (result > 0)
        {
            ReplyWithError(result);
            return;
        }

        Log.Info(string.Format("Got a request for writing {0} bytes to file {1} for user {2}.", fileData.Length, fileName, npid.ToString("X16")));

        try
        {
            var stream = File.Open(fsFile, FileMode.Create, FileAccess.Write);

            stream.BeginWrite(fileData, 0, fileData.Length, WriteCompleted, stream);

            if (backupFile != null)
            {
                var backupStream = File.Open(backupFile, FileMode.Create, FileAccess.Write);

                backupStream.BeginWrite(fileData, 0, fileData.Length, BackupWriteCompleted, backupStream);
            }
        }
        catch (Exception ex)
        {
            Log.Error(ex.ToString());
            ReplyWithError(2);
        }
    }
4

2 回答 2

4

是的,给您此消息的程序可能是锁定文件的程序。确保通过在使用后关闭每个数据流来进行良好的内务管理。

于 2014-03-12T19:47:55.423 回答
1
  var stream = File.Open(fsFile, FileMode.Create, FileAccess.Write);

您在哪里再次关闭此流?

该进程无法访问文件 xxx,因为它正被另一个进程使用。

撰写此消息的 Microsoft 程序员是一个值得信赖的人。他不想假设你弄错了。但是,当您调试代码时,该消息应该以“正在被进程使用”结尾。它包括你自己的。

另请注意,您在backupStream上犯了同样的错误。由于您已经在使用 File.ReadAllBytes() 来读取文件,因此您不妨使用 File.WriteAllBytes() 来写入它。如果您无法承受延迟,那么您需要确保在 WriteCompeted 回调方法中将其关闭。

如果您已经这样做了,那么请考虑该文件实际上可能正在被另一个进程使用。这确实发生了。

于 2013-08-11T15:32:07.690 回答