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：

<connectionType value="MySql.Data.MySqlClient.MySqlConnection, MySql.Data, Version=6.9.5.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"/>

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