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c# - FileSystemWatcher 监控目录大小

转载 作者:行者123 更新时间:2023-12-02 22:43:47 25 4
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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器,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时,这就可以正常工作了,例如.xls、.txt 等文件,但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。

请有人告诉我如何让它工作,这样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。

如果有帮助,我的 CalculateFolderSize 函数如下:

//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;
}

最佳答案

您正在使用 FileSystemEventArgs 提供的文件夹路径,因此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代替 EventArgs

您可能会发现创建此对象的一种简单方法就是使用事件处理程序的 lambda 函数,如下所示。对于您正在监控的每个路径,这有效地将外部范围的路径包装到不同的对象中。

 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
}
};

关于c# - FileSystemWatcher 监控目录大小,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/10347283/

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