blocks|key|1087096|text|您谈到的是日志文件，所以您可能正在使用FileAppender或派生类。默认情况下，这将缓冲输出。缓冲输出的效率要高得多，因此为了满足您的需求，我建议您在查看日志之前提供一些机制来刷新日志，而不是在每次写入操作后强制提交。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1087097|您可以使用如下代码来完成此操作：|1087098|foreach+(IAppender+appender+in+LogManager.GetRepository().GetAppenders())
{
++++BufferingAppenderSkeleton+b+=+appender+as+BufferingAppenderSkeleton;
++++if+(b+!=+null)+b.Flush();
}|code-block|syntax|javascript|1087099|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You talk about a log file, so presumably you're using FileAppender or a derived class. This will buffer output by default. Buffered output is much more efficient, so to meet your requirement, I'd suggest you provide some mechanism to flush the log before viewing it, rather than forcing a commit after each write operation.

You can do this with code like the following:

<pre><code>foreach (IAppender appender in LogManager.GetRepository().GetAppenders())
{
 BufferingAppenderSkeleton b = appender as BufferingAppenderSkeleton;
 if (b != null) b.Flush();
}
</code></pre>

blocks|key|1302269|text|如果您使用的是FileAppender，则此附加器继承TextWriterAppender，进而公开ImmediateFlush属性。默认情况下，此属性的值为true，并强制附加器在基础流上为每个追加操作执行Flush()。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1302270|根据您设想客户“监控”日志文件的方式，可以从您的应用程序内部启用监控。这可以通过附加到文件、使用the+MemoryAppender和从该附加器读取事件来完成。|1302271|entityMap|0|LINK|mutability|MUTABLE|url|http://logging.apache.org/log4net/release/sdk/log4net.Appender.FileAppender.html|1|http://logging.apache.org/log4net/release/sdk/log4net.Appender.TextWriterAppender.html|2|http://logging.apache.org/log4net/release/sdk/log4net.Appender.TextWriterAppender.ImmediateFlush.html|3|http://logging.apache.org/log4net/release/sdk/log4net.Appender.MemoryAppender.html^0|7|C|R|I|1E|E|27|4|2W|7|7|C|0|R|I|1|1E|E|2|0|1C|I|3|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]|$9|Y|A|Z|B|C]|$9|10|A|11|B|C]|$9|12|A|13|B|C]|$9|14|A|15|B|C]]|D|@$9|16|A|17|1|18]|$9|19|A|1A|1|1B]|$9|1C|A|1D|1|1E]]|E|$]]|$1|F|3|G|5|6|7|1F|8|@]|D|@$9|1G|A|1H|1|1I]]|E|$]]|$1|H|3|-4|5|6|7|1J|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]|P|$5|K|L|M|E|$N|Q]]|R|$5|K|L|M|E|$N|S]]|T|$5|K|L|M|E|$N|U]]]]

If you're using the <a href="http://logging.apache.org/log4net/release/sdk/log4net.Appender.FileAppender.html" rel="noreferrer"><code>FileAppender</code></a>, this appender inherits the <a href="http://logging.apache.org/log4net/release/sdk/log4net.Appender.TextWriterAppender.html" rel="noreferrer"><code>TextWriterAppender</code></a>, which in turn exposes the <a href="http://logging.apache.org/log4net/release/sdk/log4net.Appender.TextWriterAppender.ImmediateFlush.html" rel="noreferrer"><code>ImmediateFlush</code></a> property. The value of this property is <code>true</code> by default, and forces the appender to do a <code>Flush()</code> on the underlying stream for each Append operation.

Depending on how you envision the customer "monitoring" the log file, an idea could be to enable monitoring from within your application. This can be done by in addition to appending to a file, using <a href="http://logging.apache.org/log4net/release/sdk/log4net.Appender.MemoryAppender.html" rel="noreferrer">the MemoryAppender</a> and reading events from that appender.

blocks|key|1087154|text|当我在SharePoint实例中使用log4net时，我确实注意到一件事，根据您的安全配置和配置加载的实现，启动应用程序池的用户可能没有权限写入本地文件系统来创建日志文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1087155|因此，您需要确保使用正确的凭据调用您的配置，在SharePoint中，它将处于提升的安全上下文中。不完全相关，但这可能是您遇到的一个问题。|1087156|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

One thing I did notice when I was using log4net in a SharePoint instance is that, depending on your security configuration and the implementation of your configuration loading, the user that spins up the application pool may not have rights to write to the local file system to create the log file.

Because of this you need to ensure that your configuration is invoked with the right credentials, in SharePoint it would be in an elevated security context. Not entirely related, but it might be an issue you run across.

blocks|key|1087185|text|有关如何以编程方式刷新log4net日志，请参阅this+SO+post。Joe的答案虽然略有不准确，但其代码大致相同，因此可能适用于刷新所有缓冲的附加器。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1087186|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/2045992/424963^0|O|4|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]]]]

see <a href="https://stackoverflow.com/a/2045992/424963">this</a> SO post for howto programmatically flush a log4net log. Joe's answer while slightly inaccurate is roughly the same code and so would presumably work for flushing all buffered appenders.

We use the log4net to log the winform application's event and error.
Our customer want check the log file during the application running. 
But I can't find out when and how the log4net do the write(commit) operation.
And how to meet the customer's requirement, except creating another logger by myself.
Any help? Thanks.

When does log4net write or commit the log to file?

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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我们使用log4net来记录winform应用程序的事件和错误。我们的客户希望在应用程序运行期间检查日志文件。但是我不能找出log4net何时以及如何执行写(提交)操作。以及如何满足客户的需求，除了自己创建另一个记录器。有什么帮助吗？谢谢。

问log4net何时将日志写入或提交到文件？
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