blocks|key|954942|text|有一些公共领域的代码here。我当前的项目使用这个(继承自以前的开发人员)。它工作得很好，但我们确实因为不清楚的原因(可能不是由这段代码引起的)而错过了通知。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|954943|请注意，这里的Win32应用程序接口有一些限制，这使得很难/不可能避免遗漏通知。有关空气污染指数的背景资料及据称的工作详情为here。|954944|entityMap|0|LINK|mutability|MUTABLE|url|http://www.codeproject.com/KB/files/directorychangewatcher.aspx|1|http://social.msdn.microsoft.com/Forums/en-US/netfxbcl/thread/4465cafb-f4ed-434f-89d8-c85ced6ffaa8^0|A|4|0|0|1Q|4|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]]]

There is some public-domain code <a href="http://www.codeproject.com/KB/files/directorychangewatcher.aspx" rel="noreferrer">here</a>. My current project uses this (inherited from previous developers). It works pretty well but we do miss notifications for reasons that are unclear (and possibly not caused by this code). 

Note that the Win32 API here has some limitations which make it difficult/impossible to avoid missing notifications. Background and alleged work-round for the API are <a href="http://social.msdn.microsoft.com/Forums/en-US/netfxbcl/thread/4465cafb-f4ed-434f-89d8-c85ced6ffaa8" rel="noreferrer">here</a>

blocks|key|954968|text|那么ReadDirectoryChangesW函数呢？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|954969|http://msdn.microsoft.com/en-us/library/aa365465(VS.85).aspx|offset|length|954970|它将通知存储在缓冲区中，这样您就不会错过任何更改(除非缓冲区溢出)|954971|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1O|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@$D|Q|E|R|1|S]]|A|$]]|$1|F|3|G|5|6|7|T|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|C]]]]

What about the ReadDirectoryChangesW function?

<a href="http://msdn.microsoft.com/en-us/library/aa365465(VS.85).aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/aa365465(VS.85).aspx</a>

It stores notifications in a buffer so you don't miss any changes (unless the buffer overflows)

blocks|key|743431|text|通过C#，我们可以随时编写一个COM包装器(+http://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher.created%2528v=vs.71%2529.aspx+Wrapper|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|743432|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher.created%2528v=vs.71%2529.aspx^0|N|2L|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

<a href="http://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher.created%28v=vs.71%29.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher.created%28v=vs.71%29.aspx</a> the above does throgh C#, we can always write a COM Wrapper

blocks|key|2044324|text|2021答案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2044325|下面列出的repo的派生版本是主动维护的：https://github.com/SpartanJ/efsw|offset|length|2044326|老生常谈：|2044327|这是一个跨平台的解决方案，但是很好地完成了包装Win32的工作：https://github.com/jameswynn/simplefilewatcher|2044328|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/SpartanJ/efsw|1|https://github.com/jameswynn/simplefilewatcher^0|0|L|W|0|0|0|W|1A|1|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@$D|V|E|W|1|X]]|A|$]]|$1|F|3|G|5|6|7|Y|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|Z|8|@]|9|@$D|10|E|11|1|12]]|A|$]]|$1|J|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q]]|R|$5|M|N|O|A|$P|S]]]]

2021 answer:
A forked version of the repo listed below that is actively maintained: <a href="https://github.com/SpartanJ/efsw" rel="nofollow noreferrer">https://github.com/SpartanJ/efsw</a>
Old answer:
This is a cross-platform solution, but does the job wrapping the Win32 stuff nicely:
<a href="https://github.com/jameswynn/simplefilewatcher" rel="nofollow noreferrer">https://github.com/jameswynn/simplefilewatcher</a>

I need a .Net's FileSystemWatcher analog in raw C++/WinAPI.
I almost started to code one myself using FindFirstChangeNotification/FindNextChangeNotification, but then it occurred to me that I am probably not the first one who needs this and maybe someone will be willing to share.

Ideally what I need is a class which can be used as follows:

<pre><code>FileWatcher fw;
fw.startWatching("C:\MYDIR", "filename.dat", 
 FileWatcher::SIZE | FileWatcher::LAST_WRITE,
 &amp;myChangeHandler);
...
fw.stopWatching();
</code></pre>

Or if it would use somehting like boost::signal it would be even better.
But please, no dependencies other than the Standard Library, boost and raw WinAPI.
Thanks!

Does anyone have a FileSystemWatcher-like class in C++/WinAPI?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我需要一个.Net的FileSystemWatcher模拟的原始C++/WinAPI。我几乎开始自己使用FindFirstChangeNotification/FindNextChangeNotification，编写代码，但后来我突然想到，我可能不是第一个需要它的人，也许会有人愿意分享。理想情况下，我需要的是一个可以...

问有没有人在C++/WinAPI中有一个类似FileSystemWatcher的类？
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问有没有人在C++/WinAPI中有一个类似FileSystemWatcher的类？EN