log4net info 方法根据不同业务创建不同的文件名

<configuration>  
  <!-- ... 其他配置 ... -->  
  
  <configSections>  
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />  
  </configSections>  
  
  <log4net>  
    <appender name="RollingFileAppenderA" type="log4net.Appender.RollingFileAppender">  
      <file value="logs/BusinessA.log" />  
      <appendToFile value="true" />  
      <rollingStyle value="Size" />  
      <maxSizeRollBackups value="5" />  
      <maximumFileSize value="10MB" />  
      <staticLogFileName value="true" />  
      <layout type="log4net.Layout.PatternLayout">  
        <conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />  
      </layout>  
    </appender>  
  
    <appender name="RollingFileAppenderB" type="log4net.Appender.RollingFileAppender">  
      <file value="logs/BusinessB.log" />  
      <appendToFile value="true" />  
      <rollingStyle value="Size" />  
      <maxSizeRollBackups value="5" />  
      <maximumFileSize value="10MB" />  
      <staticLogFileName value="true" />  
      <layout type="log4net.Layout.PatternLayout">  
        <conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />  
      </layout>  
    </appender>  
  
    <logger name="BusinessA">  
      <additivity value="false" />  
      <level value="INFO" />  
      <appender-ref ref="RollingFileAppenderA" />  
    </logger>  
  
    <logger name="BusinessB">  
      <additivity value="false" />  
      <level value="INFO" />  
      <appender-ref ref="RollingFileAppenderB" />  
    </logger>  
  
    <root>  
      <level value="INFO" />  
      <!-- 如果你还想为根logger配置appender，可以在这里添加 -->  
    </root>  
  </log4net>  
  
  <!-- ... 其他配置 ... -->  
</configuration>

使用：

// 获取BusinessA的logger实例  
ILog logA = LogManager.GetLogger("BusinessA");  
logA.Info("This is a log message for BusinessA.");  
  
// 获取BusinessB的logger实例  
ILog logB = LogManager.GetLogger("BusinessB");  
logB.Info("This is a log message for BusinessB.");