为什么在配置文件中无法识别log4net? [英] Why is log4net not recognized in configuration file?

问题描述

我使用

我的App.config文件如下所示:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
  </startup>
  <appSettings>
    <add key="log4net.Internal.Debug" value="true"/>
  </appSettings>
  <log4net>
    <!-- A1 is set to be a ConsoleAppender -->
    <appender name="A1" type="log4net.Appender.FileAppender">
      <file value="logfile.txt" />
      <appendToFile value="false" />

      <!-- A1 uses PatternLayout -->
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%-4timestamp [%thread] %-5level %logger %ndc - %message%newline" />
      </layout>
    </appender>

    <!-- Set root logger level to DEBUG and its only appender to A1 -->
    <root>
      <level value="DEBUG" />
      <appender-ref ref="A1" />
    </root>
  </log4net>
</configuration>

执行测试程序最终会出现以下错误消息:

Executing the test program ends up in the following error message:

log4net:ERROR Exception while reading ConfigurationSettings. Check your .config
file is well formed XML.
System.Configuration.ConfigurationErrorsException: Configuration system failed t
o initialize ---> System.Configuration.ConfigurationErrorsException: Unrecognize
d configuration section log4net. 

我的配置文件出了什么问题?

What is wrong with my configuration file?

更新1: configSections´ part was missing, as pointed out in the accepted answer. But I also had to remove the startup section, otherwise the same error appeared. I do not know why the startup`部分也引起了该问题.也许更有经验的人可以说并写评论.

UPDATE 1: The configSections´ part was missing, as pointed out in the accepted answer. But I also had to remove thestartupsection, otherwise the same error appeared. I do not know why thestartup` section is causing the problem, too. Perhaps someone more experienced can tell and write a comment.

推荐答案

您还需要在节块中添加log4net

You need to add log4net also in the section block

<configSections>

<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net"/> 

</configSections>

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