<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <!-- This section contains the log4net configuration settings -->
  <log4net>

    <!-- Setup the root category, add the appenders and set the default level -->
    <!--控制级别，由低到高：ALL|DEBUG|INFO|WARN|ERROR|FATAL|OFF-->
    <root>
      <level value="ALL" />
      <appender-ref ref="RollingLogFileAppender" />
    </root>

    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
      <!--最小锁定模型以允许多个进程可以写入同一个文件-->
      <lockingModel  type="log4net.Appender.FileAppender+MinimalLock" />
      <!--日志文件路径-->
      <file value="log//" />
      <!--是否是向文件中追加日志-->
      <appendToFile value="true" />
      <!--日志根据日期滚动-->
      <rollingStyle value="Date" />
      <!--日志文件名是否是固定不变的-->
      <staticLogFileName value="false" />
      <!--日志文件名格式为:2008-08-31.log-->
      <datePattern value="yyyy-MM-dd'.log'" />
      <!--log保留天数-->
      <maxSizeRollBackups value="10" />
      <!--最大文件大小-->
      <maximumFileSize value="1MB" />
      <!--信息日志布局-->
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
      </layout>
    </appender>

  </log4net>
</configuration>

log4net.config

 

初始化

            log4net.Config.XmlConfigurator.Configure(new System.IO.FileInfo( "C:\\log4net.config"));

实例化对象

        static readonly ILog log = LogManager.GetLogger(typeof(MainService));