使用.NET Framework监视目录中文件更改的可靠方法 [英] Reliable way of monitoring file changes in a directory using the .NET framework
问题描述
我正在寻找一种可靠的方法来查找目录中的更改.
I'm looking for a reliable way of looking for changes in a directory.
我曾尝试使用FileSystemWatcher，但是当创建，更改或删除许多小文件时，这相当不准确.在我的测试中，它丢失了大约1％或2％的文件.快速添加或更改成千上万个文件时，这是很多事情.
I have tried using the FileSystemWatcher, but it's rather inaccurate when many small files are created, changed or deleted. It misses about 1 or 2 % of the files in my tests. That is quite a lot when you are adding or changing thousands of files rapidly.
我尝试以500 ms，2000 ms等不同的间隔轮询更改.在这种情况下，我的点击次数过多.这可能与FileInfo对象上时间戳的解析有关.
I have tried polling for changes at different intervals 500 ms, 2000 ms etc. In this case I get too many hits. That might have something to do with the resolution of timestamps on the FileInfo object.
所以我的问题是；是否可以使用.NET Framework可靠地将更改保存到目录中?
So my question is; is it possible, using the .NET Framework, to get the the changes to a directory reliably?
- 基督徒
推荐答案
Have you tried increasing the InternalBufferSize? What size have you set it to?
来自 MSDN :
请注意，FileSystemWatcher可能会丢失 缓冲区大小为时的事件 超过.为了避免遗漏事件， 请遵循以下准则:增加 通过设置缓冲区大小 InternalBufferSize属性.避免 观看带有长文件名的文件， 因为文件名很长 填满缓冲区.考虑 使用更短的名称重命名这些文件 名称.
Note that a FileSystemWatcher may miss an event when the buffer size is exceeded. To avoid missing events, follow these guidelines: Increase the buffer size by setting the InternalBufferSize property. Avoid watching files with long file names, because a long file name contributes to filling up the buffer. Consider renaming these files using shorter names.
保持事件处理代码尽可能短.
Keep your event handling code as short as possible.
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