blocks|key|1154254|text|确保运行站点的进程(帐户)具有写入输出目录的权限。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1154255|在IIS7和更高版本中，这是在应用程序池上配置的，通常是AppPool+Identity，它通常没有写入所有目录的权限。|offset|length|1154256|检查您的事件日志(应用程序和安全性)，看看是否抛出了任何异常。|1154257|entityMap|0|LINK|mutability|MUTABLE|url|http://learn.iis.net/page.aspx/624/application-pool-identities/^0|0|S|G|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@$D|R|E|S|1|T]]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

Make sure the process (account) that the site is running under has privileges to write to the output directory.

In IIS 7 and above this is configured on the application pool and is normally the <a href="http://learn.iis.net/page.aspx/624/application-pool-identities/" rel="noreferrer">AppPool Identity</a>, which will not normally have permission to write to all directories.

Check your event logs (application and security) to see if any exceptions were thrown.

blocks|key|1154316|text|使用以下常见问题页面：Apache+log4net+Frequently+Asked+Questions|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1154317|大约3/4的篇幅告诉你如何使用应用程序跟踪来启用log4net调试。这将告诉您您的问题所在。|1154318|基本情况是：|1154319|<?xml+version="1.0"+encoding="utf-8"+?>
<configuration>
++++<appSettings>
++++++++<add+key="log4net.Internal.Debug"+value="true"/>
++++</appSettings>
</configuration>|code-block|syntax|javascript|1154320|您可以在标准输出中看到跟踪|1154321|entityMap|0|LINK|mutability|MUTABLE|url|http://logging.apache.org/log4net/release/faq.html^0|B|15|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|11|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|12|8|@]|9|@]|C|$K|L]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

Use this FAQ page: <a href="http://logging.apache.org/log4net/release/faq.html" rel="noreferrer">Apache log4net Frequently Asked Questions</a>

About 3/4 of the way down it tells you how to enable log4net debugging by using application tracing. This will tell you where your issue is.

The basics are:

<pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt;
&lt;configuration&gt;
 &lt;appSettings&gt;
 &lt;add key="log4net.Internal.Debug" value="true"/&gt;
 &lt;/appSettings&gt;
&lt;/configuration&gt;
</code></pre>

And you see the trace in the standard output

blocks|key|940050|text|你会打电话给|type|unstyled|depth|inlineStyleRanges|entityRanges|data|940051|log4net.Config.XmlConfigurator.Configure();|code-block|syntax|javascript|940052|有什么地方可以让log4net读取你的配置？例如在Global.asax中：|940053|void+Application_Start(object+sender,+EventArgs+e)+
{
++++//+Code+that+runs+on+application+startup

++++//+Initialize+log4net.
++++log4net.Config.XmlConfigurator.Configure();
}|940054|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Do you call

<pre><code>log4net.Config.XmlConfigurator.Configure();
</code></pre>

somewhere to make log4net read your configuration? E.g. in Global.asax:

<pre><code>void Application_Start(object sender, EventArgs e) 
{
 // Code that runs on application startup

 // Initialize log4net.
 log4net.Config.XmlConfigurator.Configure();
}
</code></pre>

blocks|key|1154409|text|正如@AndreasPaulsson建议的那样，我们需要对其进行配置。我在AssemblyInfo文件中进行配置。我在这里指定configuration+file+name。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1154410|//+Log4Net+Configuration.
[assembly:+log4net.Config.XmlConfigurator(ConfigFile+=+"log4net.config",+Watch+=+true)]|code-block|syntax|javascript|1154411|entityMap^0|11|C|1R|N|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

As @AndreasPaulsson suggested, we need to configure it. I am doing the configuration in <code>AssemblyInfo</code> file. I specify the <code>configuration file name</code> here.

<pre><code>// Log4Net Configuration.
[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", Watch = true)]
</code></pre>

blocks|key|940184|text|在我的例子中，由于我的项目名称中有一个空格，log4net没有正确地记录日志。让我抓狂的是为什么相同的代码在不同的项目中工作得很好，而在新的项目中却不能。空格。一个简单的空间。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|940185|因此，请注意项目名称中的空格。我已经吸取了教训。|940186|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|$]]

In my case, log4net wasn't logging properly due to having a space in my project name. Drove me nuts why the same code worked just fine in a different project, but didn't in the new one. Spaces. A simple space.

So, beware spaces in project names. I've learned my lesson.

blocks|key|1154552|text|对于我来说，我移动了日志文件的位置，只有当我将文件名更改为其他名称时，它才会重新启动。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1154553|似乎如果已经存在具有相同名称的日志文件，则不会发生任何事情。|1154554|之后，我重命名了旧文件，并将配置中的日志文件名再次更改为原来的名称。|1154555|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

For me I moved the location of the logfiles and it was only when I changed the name of the file to something else it started again.

It seems if there is a logfile with the same name already existing, nothing happens.

Afterwards I rename the old file and changed the log filename in the config back again to what it was.

blocks|key|940365|text|在我的例子中，我必须授予IIS_IUSRS对日志文件的读\写权限。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|940366|entityMap^0|C|9|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

In my case I had to give the <code>IIS_IUSRS</code> Read\write permission to the log file.

blocks|key|940396|text|确保下面的代码行应该在AssemblyInfo.cs文件中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|940397|程序集:+log4net.Config.XmlConfigurator(ConfigFile+=+"Web.config"，Watch+=+true)|940398|并在Application_start()方法中检查此行。|940399|log4net.Config.XmlConfigurator.Configure();|code-block|syntax|javascript|940400|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|P|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Make sure the following line code should be there in AssemblyInfo.cs file.

[assembly: log4net.Config.XmlConfigurator(ConfigFile = "Web.config", Watch = true)]

and also check for this line in Application_start() method.

<pre><code>log4net.Config.XmlConfigurator.Configure();
</code></pre>

blocks|key|940446|text|您的配置文件似乎是正确的。然后，您必须将Log4net配置文件注册到应用程序。所以你可以使用下面的代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|940447|var+logRepo+=+LogManager.GetRepository(Assembly.GetEntryAssembly());
XmlConfigurator.Configure(logRepo,+new+FileInfo("log4net.config"));|code-block|syntax|javascript|940448|注册流程后，可以调用下面的定义来调用logger：|940449|private+static+readonly+ILog+log+=+LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

log.Error("Sample+log");|940450|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Your config file seems correct. Then, you have to register your Log4net config file to application. So you can use below code: 

<pre><code>var logRepo = LogManager.GetRepository(Assembly.GetEntryAssembly());
XmlConfigurator.Configure(logRepo, new FileInfo("log4net.config"));
</code></pre>

After registering process, you can call below definition to call logger:

<pre><code>private static readonly ILog log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

log.Error("Sample log");
</code></pre>

blocks|key|940479|text|对我来说，我不得不将Logger移到Nuget包中。下面的代码需要添加到NuGet包项目中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|940480|[assembly:+log4net.Config.XmlConfigurator(ConfigFile+=+"log4net.config")]|code-block|syntax|javascript|940481|有关更多详细信息，请参阅https://gurunadhduvvuru.wordpress.com/2020/04/30/log4net-issues-when-moved-it-to-a-nuget-package/。|offset|length|940482|entityMap|0|LINK|mutability|MUTABLE|url|https://gurunadhduvvuru.wordpress.com/2020/04/30/log4net-issues-when-moved-it-to-a-nuget-package/^0|0|0|C|2P|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

For me I had to move Logger to a Nuget Package. Below code need to be added in NuGet package project.

<pre><code>[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config")]
</code></pre>

See <a href="https://gurunadhduvvuru.wordpress.com/2020/04/30/log4net-issues-when-moved-it-to-a-nuget-package/" rel="nofollow noreferrer">https://gurunadhduvvuru.wordpress.com/2020/04/30/log4net-issues-when-moved-it-to-a-nuget-package/</a> for more details.

blocks|key|940537|text|有几种方法可以使用log4net。在我寻找解决方案的时候，我发现它很有用。这里描述了解决方案：https://www.hemelix.com/log4net/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|940538|entityMap|0|LINK|mutability|MUTABLE|url|https://www.hemelix.com/log4net/^0|1B|W|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]]]]

There are a few ways to use log4net.
I found it is useful while I was searching for a solution. The solution is described here: <a href="https://www.hemelix.com/log4net/" rel="nofollow noreferrer">https://www.hemelix.com/log4net/</a>

I have created a simple scenario using Log4net, but it seems that my log appenders do not work because the messages are not added to the log file.
I added the following to the web.config file:
<pre class="lang-xml prettyprint-override"><code>&lt;configSections&gt;
 &lt;section name=&quot;log4net&quot; type=&quot;log4net.Config.Log4NetConfigurationSectionHandler, log4net&quot; requirePermission=&quot;false&quot;/&gt; 
&lt;/configSections&gt;

&lt;log4net&gt;
 &lt;appender name=&quot;LogFileAppender&quot; type=&quot;log4net.Appender.FileAppender&quot;&gt;
 &lt;file value=&quot;D:\MyData\Desktop\LogFile.txt&quot; /&gt;
 &lt;appendToFile value=&quot;true&quot; /&gt;
 &lt;encoding value=&quot;utf-8&quot; /&gt;
 &lt;layout type=&quot;log4net.Layout.SimpleLayout&quot; /&gt;
 &lt;/appender&gt;


 &lt;root&gt;
 &lt;level value=&quot;INFO&quot; /&gt;
 &lt;appender-ref ref=&quot;LogFileAppender&quot; /&gt;
 &lt;/root&gt;
&lt;/log4net&gt;
</code></pre>
Within the global ASAX file I have added:
<pre><code>ILog logger = LogManager.GetLogger(typeof(MvcApplication));
</code></pre>
And within the Application_Start method:
<pre><code>logger.Info(&quot;Starting the application...&quot;);
</code></pre>
Why the test log &quot;Starting the application...&quot; is not being added to the log file?

Log4net does not write the log in the log file

日志文件

我已经使用Log4net创建了一个简单的场景，但我的日志附加器似乎无法工作，因为消息没有添加到日志文件中。我在web.config文件中添加了以下内容：<configSections> <section name="log4net" type="log4net.Config.Log4NetConfiguratio...

问Log4net不在日志文件中写入日志
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