2

您好我正在创建一个 Windows 服务来监视某些目录,以查看目录的大小是否已达到其限制。我创建了一个文件系统观察程序,如下所示:

            FileSystemWatcher watcher = new FileSystemWatcher();
            watcher.Path = dirPaths[i].ToString();
            watcher.NotifyFilter = NotifyFilters.Size;
            watcher.EnableRaisingEvents = true;
            watcher.Changed += new FileSystemEventHandler(OnChanged);

 private void OnChanged(object source, FileSystemEventArgs e)
    {
        try
        {
        
        string directory = new DirectoryInfo(e.FullPath).Parent.FullName;//gettting the directory path from the full path

        float dirSize = CalculateFolderSize(directory);

        float limitSize = int.Parse(_config.TargetSize);//getting the limit size 

        if (dirSize > limitSize)
        {
            eventLogCheck.WriteEntry("the following path has crossed the limit " + directory);
            //TODO: mail sending
        }
    }
    catch (Exception ex)
    {
        eventLogCheck.WriteEntry(ex.ToString());
    }

}

CalculateFolderSize检查驱动器中所有文件和子目录的大小。

现在,当我将文件添加到目录(例如 .xls、.txt 等文件)时,这可以正常工作,但是如果我将文件夹添加到目录,它不会触发OnChanged事件?

如果我启用:

watcher.IncludeSubdirectories = true;

它确实触发了Onchanged事件,但在这种情况下,它只检查子目录而不是整个目录。

请有人告诉我如何使它工作,以便当我将文件夹复制到正在监视的目录时,它会触发Onchanged事件并计算目录的新大小。

如果这有帮助,我的CalculateFolderSize功能如下:

//function to calculate the size of the given path
        private float CalculateFolderSize(string folder)
        {
            float folderSize = 0.0f;
            try
            {
                //Checks if the path is valid or not         
                if (!Directory.Exists(folder))
                {
                    return folderSize;
                }
                else
                {
                    try
                    {
                        foreach (string file in Directory.GetFiles(folder))
                        {
                            if (File.Exists(file))
                            {
                                FileInfo finfo = new FileInfo(file);
                                folderSize += finfo.Length;
                            }
                        }
                        foreach (string dir in Directory.GetDirectories(folder))
                        {
                            folderSize += CalculateFolderSize(dir);
                        }
                    }
                    catch (NotSupportedException ex)
                    {
                        eventLogCheck.WriteEntry(ex.ToString());
                    }
                }
            }
            catch (UnauthorizedAccessException ex)
            {
                eventLogCheck.WriteEntry(ex.ToString());
            }
            return folderSize;
        }
4

1 回答 1

5

您正在使用由 提供的文件夹路径,FileSystemEventArgs这将是已更改的文件夹。相反,为您正在监视的每个目录根创建一个对象,并在其中存储根路径并使用它而不是EventArgs.

您可能会发现创建此对象的一种简单方法就是对事件处理程序使用 lambda 函数,如下所示。这有效地将外部范围的路径包装到您正在监视的每个路径的不同对象中。

 FileSystemWatcher watcher = new FileSystemWatcher();
 watcher.Path = dirPaths[i].ToString();
 watcher.NotifyFilter = NotifyFilters.Size;
 watcher.EnableRaisingEvents = true;
 watcher.Changed += delegate (object source, FileSystemEventArgs e)
 {
    float dirSize = CalculateFolderSize(watcher.Path); // using the path from the outer scope

    float limitSize = int.Parse(_config.TargetSize);//getting the limit size 

    if (dirSize > limitSize)
    {
        eventLogCheck.WriteEntry("the folloing path has crossed the limit " + directory);
        //TODO: mail sending
    }
 };
于 2012-04-27T08:35:07.740 回答