.Net Core 实践 - 使用log4net记录日志（1）

demo地址：https://github.com/puzzledalien/log4net_demo

准备

• log4net 最新版本是2.0.8
• vs2017
• .net core 2.2
• 测试电脑配置 windows10 64位 4核cpu 16g内存

log4net官网引导文档 ：

配置和代码

log4net.config配置如下

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configsections>
    <section name="log4net" type="log4net.config.log4netconfigurationsectionhandler, log4net"/>
  </configsections>
  <log4net>
    <appender name="rollinglogfileappender" type="log4net.appender.rollingfileappender">
      <!--日志路径-->
      <param name= "file" value= ".\app_log\servicelog\"/>
      <!--是否是向文件中追加日志-->
      <param name= "appendtofile" value= "true"/>
      <!--log保留天数-->
      <param name= "maxsizerollbackups" value= "10"/>
      <!--每个log文件最大是2m，如果超过2m将重新创建一个新的log文件，并将原来的log文件备份。-->
      <maximumfilesize value="2mb" />
      <!--日志文件名是否是固定不变的-->
      <param name= "staticlogfilename" value= "false"/>
      <!--日志文件名格式为:2008-08-31-12.log-->
      <param name= "datepattern" value= "yyyy-mm-dd-hh-mm&quot;.read.log&quot;"/>
      <!--日志根据日期滚动-->
      <param name= "rollingstyle" value= "date"/>
      <layout type="log4net.layout.patternlayout">
        <param name="conversionpattern" value="%d [%t] %-5p %c - %m%n %loggername" />
      </layout>
      <lockingmodel type="log4net.appender.fileappender+minimallock" />
    </appender>
    <!-- 控制台前台显示日志 -->
    <appender name="managedcoloredconsoleappender" type="log4net.appender.managedcoloredconsoleappender">
      <mapping>
        <level value="error" />
        <forecolor value="red" />
      </mapping>
      <mapping>
        <level value="info" />
        <forecolor value="green" />
      </mapping>
      <mapping>
        <level value="debug" />
        <forecolor value="blue" />
      </mapping>
      <mapping>
        <level value="warn" />
        <forecolor value="yellow" />
      </mapping>
      <layout type="log4net.layout.patternlayout">
        <conversionpattern value="%n%date{hh:mm:ss,fff} [%-5level] %m" />
      </layout>
      <filter type="log4net.filter.levelrangefilter">
        <param name="levelmin" value="debug" />
        <param name="levelmax" value="fatal" />
      </filter>
    </appender>
    <root>
      <!--(高) off > fatal > error > warn > info > debug > all (低) -->
      <level value="all" />
      <appender-ref ref="managedcoloredconsoleappender"/>
      <appender-ref ref="rollinglogfileappender"/>
    </root>
  </log4net>
</configuration>

添加引用

using log4net;
using log4net.config;
using log4net.repository;

代码如下：

        private static iloggerrepository _loggerrepository;
        static void main(string[] args)
        {
            _loggerrepository = logmanager.createrepository("consoleapp3");
            xmlconfigurator.configureandwatch(_loggerrepository, new fileinfo("log4net.config"));
            var log = logmanager.getlogger(_loggerrepository.name, typeof(program));

            const int numberofcycles = 20000;

            var sw = stopwatch.startnew();
            for (var i = 0; i < numberofcycles; i++)
            {
                log.infoformat("testnum: {0} ", i);
            }
            sw.stop();

            console.writeline();
            console.writeline("ellapsed: {0}, numpersec: {1}", sw.elapsedmilliseconds, numberofcycles / (sw.elapsedmilliseconds / (double)1000));

            console.writeline("hello world!");

            console.readkey();
        }

执行结果：
本地写log文本日志和console打印日志的时间14720毫秒 一秒钟写日志1359条

ellapsed: 14720, numpersec: 1358.69565217391