blocks|key|1382545|text|正如你所说，这很方便，因为你可以在不知道类名的情况下在方法中创建记录器(我知道这很简单)，但它允许你在类之间剪切和粘贴方法，而不必重命名调用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1382546|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

As you say - its convenient as you can create a logger in a method without knowing the name of the class (trivial I know) but allows you to cut and paste methods between classes without having to rename the call.

blocks|key|1597655|text|我想你已经找到原因了。我这样做，所以我不必担心类名，只需将样板代码复制并粘贴到新类中即可。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1597656|有关官方答案，请参阅:如何在静态块中获取类的完全限定名称？在log4net+faq|offset|length|1597657|entityMap|0|LINK|mutability|MUTABLE|url|http://logging.apache.org/log4net/release/faq.html#static-class-name^0|0|U|B|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

I think you've got the reason. I do it that way so I don't have to worry about the class name and can just copy and paste boiler plate code in a new class.

For the official answer, see: How do I get the fully-qualified name of a class in a static block? at the <a href="http://logging.apache.org/log4net/release/faq.html#static-class-name" rel="noreferrer">log4net faq</a>

blocks|key|1382622|text|我认为原因是，您使用.DeclaringType()方法获取运行时类型的类型。您可以在基类中使用记录器，并且仍然可以在记录器输出中看到对象的实际类型。这使得调查变得更加方便。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1382623|entityMap^0|A|G|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|$]]

I think the reason is, that you get the type of the runtime type using the <code>.DeclaringType()</code> method. You can use the logger in a base class and still see the actual type of your object in the loggers output. That makes investigations much more convinient.

blocks|key|1597832|text|我是一个NLog用户，通常可以归结为：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1597833|var+_logger+=+LogManager.GetCurrentClassLogger();|code-block|syntax|javascript|1597834|你需要在Log4Net中使用反射，这看起来有点奇怪，所以我看了一下NLog源代码，你看，这就是他们为你做的事情：|1597835|[MethodImpl(MethodImplOptions.NoInlining)]
public+static+Logger+GetCurrentClassLogger()
{
++++string+loggerName;
++++Type+declaringType;
++++int+framesToSkip+=+1;
++++do
++++{
#if+SILVERLIGHT
++++++++StackFrame+frame+=+new+StackTrace().GetFrame(framesToSkip);
#else
++++++++StackFrame+frame+=+new+StackFrame(framesToSkip,+false);
#endif
++++++++var+method+=+frame.GetMethod();
++++++++declaringType+=+method.DeclaringType;
++++++++if+(declaringType+==+null)
++++++++{
++++++++++++loggerName+=+method.Name;
++++++++++++break;
++++++++}
++++++++framesToSkip%2B%2B;
++++++++loggerName+=+declaringType.FullName;
++++}+while+(declaringType.Module.Name.Equals("mscorlib.dll",+StringComparison.OrdinalIgnoreCase));
++++return+globalFactory.GetLogger(loggerName);
}|1597836|我想我会为Log4Net编写类似的扩展或静态方法，而不是将反射粘贴到我的锅炉代码中:)|1597837|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I'm an NLog user, and usually this boils down to :

<pre><code>var _logger = LogManager.GetCurrentClassLogger();
</code></pre>

It seemed a bit strange that you need to go through reflection in Log4Net, so I had a look in the NLog source code, and lo and behold, this is what they do for you:

<pre><code>[MethodImpl(MethodImplOptions.NoInlining)]
public static Logger GetCurrentClassLogger()
{
 string loggerName;
 Type declaringType;
 int framesToSkip = 1;
 do
 {
#if SILVERLIGHT
 StackFrame frame = new StackTrace().GetFrame(framesToSkip);
#else
 StackFrame frame = new StackFrame(framesToSkip, false);
#endif
 var method = frame.GetMethod();
 declaringType = method.DeclaringType;
 if (declaringType == null)
 {
 loggerName = method.Name;
 break;
 }
 framesToSkip++;
 loggerName = declaringType.FullName;
 } while (declaringType.Module.Name.Equals("mscorlib.dll", StringComparison.OrdinalIgnoreCase));
 return globalFactory.GetLogger(loggerName);
}
</code></pre>

I guess I would write something similar for Log4Net as an extension or static method instead of pasting the reflection as part of my boiler code :)

blocks|key|1597887|text|它还使创建用于代码生成目的的Codesmith模板变得更容易。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1597888|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

It also makes it easier to create Codesmith templates for code generation purposes.

Why do most log4net examples get the logger for a class by doing this:

<pre><code>private static ILog logger = 
 LogManager.GetLogger(
 System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
</code></pre>

Rather than just passing typeof(MyClass):

<pre><code>private static ILog logger = LogManager.GetLogger(typeof(MyClass));
</code></pre>

Is there any other reason for doing this, beside the fact that the first option does not require you to type a specific class name?

log4net argument to LogManager.GetLogger

为什么大多数log4net示例通过这样做来获取类的记录器：private static ILog logger =     LogManager.GetLogger(    System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);而不仅仅是传递typ...

问LogManager.GetLogger的log4net参数
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