log4net内部调试开启

最近用log4net写入日志到mysql数据库，死活写不进去，就想能不能看log4net的错误记录，在网上一找，还真有：开启log4net的内部调试，作个记录：

<appSettings>

    <add key="log4net.Internal.Debug" value="true"/>

  </appSettings>

  <system.diagnostics>

    <trace autoflush="true">

      <listeners>

        <add

            name="textWriterTraceListener"

            type="System.Diagnostics.TextWriterTraceListener"

            initializeData="C:\log4net.txt" />

      </listeners>

    </trace>

  </system.diagnostics>

将这两个配置节放在<configuration>中

<configuration>

  <configSections>

    <sectionGroup name="common">

      <section name="logging" type="Common.Logging.ConfigurationSectionHandler, Common.Logging" />

    </sectionGroup>

  </configSections>

  <common>

    <logging>

      <!--2.此Adapter只输出到log4.net的配置文件所指定的地方-->

      <factoryAdapter type="Common.Logging.Log4Net.Log4NetLoggerFactoryAdapter, Common.Logging.Log4Net1213">

        <!--FILE,FILE-WATCH,INLINE,EXTERNAL-->

        <arg key="configType" value="FILE" />

        <arg key="configFile" value="~/log4net.config" />

        <!-- 指定log4net的配置文件名称 -->

        <arg key="level" value="info" />

      </factoryAdapter>

    </logging>

  </common>

  <appSettings>

    <add key="log4net.Internal.Debug" value="true"/>

  </appSettings>

  <system.diagnostics>

    <trace autoflush="true">

      <listeners>

        <add

            name="textWriterTraceListener"

            type="System.Diagnostics.TextWriterTraceListener"

            initializeData="C:\log4net.txt" />

      </listeners>

    </trace>

  </system.diagnostics>

  <connectionStrings>

    <add name="MySQL" connectionString="server=.;database=*****;Uid=****;Pwd=****;" />

  </connectionStrings>

    <system.web>

        <compilation debug="true" targetFramework="4.0" />

    </system.web>

  <runtime>

    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">

      <dependentAssembly>

        <assemblyIdentity name="log4net" publicKeyToken="669e0ddf0bb1aa2a" culture="neutral" />

        <bindingRedirect oldVersion="0.0.0.0-1.2.11.0" newVersion="1.2.11.0" />

      </dependentAssembly>

    </assemblyBinding>

  </runtime>

</configuration>

另log4net的mysql写法：

参照了此网页的评论：http://www.cnblogs.com/jimmyblog/archive/2008/08/18/1270665.html