.NET Core 下使用 Log4Net 记录日志

Log4Net相信大家都很熟悉了，算是比较主流和著名的日志组件了。

• 官网：http://logging.apache.org

最佳实践

在项目中添加组件包

Install-Package log4net

添加log4net.config文件

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <p name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
  </configSections>
  <log4net debug="false">

    <appender name="info" type="log4net.Appender.RollingFileAppender,log4net">
      <param name="File" value="log4net/info/" />
      <param name="AppendToFile" value="true" />
      <param name="MaxSizeRollBackups" value="-1"/>
      <param name="MaximumFileSize" value="5MB"/>
      <param name="RollingStyle" value="Composite" />
      <param name="DatePattern" value="yyyyMMdd\\HH&quot;.log&quot;" />
      <param name="StaticLogFileName" value="false" />
      <layout type="log4net.Layout.PatternLayout,log4net">
        <param name="ConversionPattern" value="%n
{
    &quot;system&quot;: &quot;Meowv.Blog&quot;,
    &quot;datetime&quot;: &quot;%d&quot;,
    &quot;description&quot;: &quot;%m&quot;,
  &quot;level&quot;: &quot;%p&quot;,
    &quot;info&quot;: &quot;%exception&quot;
}" />
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter">
        <levelMin value="INFO" />
        <levelMax value="INFO" />
      </filter>
    </appender>

    <appender name="error" type="log4net.Appender.RollingFileAppender,log4net">
      <param name="File" value="log4net/error/" />
      <param name="AppendToFile" value="true" />
      <param name="MaxSizeRollBackups" value="-1"/>
      <param name="MaximumFileSize" value="5MB"/>
      <param name="RollingStyle" value="Composite" />
      <param name="DatePattern" value="yyyyMMdd\\HH&quot;.log&quot;" />
      <param name="StaticLogFileName" value="false" />
      <layout type="log4net.Layout.PatternLayout,log4net">
        <param name="ConversionPattern" value="%n
{
    &quot;system&quot;: &quot;Meowv.Blog&quot;,
    &quot;datetime&quot;: &quot;%d&quot;,
    &quot;description&quot;: &quot;%m&quot;,
  &quot;level&quot;: &quot;%p&quot;,
    &quot;info&quot;: &quot;%exception&quot;
}" />
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter">
        <levelMin value="ERROR" />
        <levelMax value="ERROR" />
      </filter>
    </appender>

    <root>
      <level value="ALL"></level>
      <appender-ref ref="info"/>
      <appender-ref ref="error"/>
    </root>

  </log4net>

</configuration>

控制台项目

using log4net;
using log4net.Config;
using System;
using System.IO;
using System.Reflection;

namespace ConsoleAppDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            var log4netRepository = LogManager.GetRepository(Assembly.GetEntryAssembly());
            XmlConfigurator.Configure(log4netRepository, new FileInfo("log4net.config"));

            ILog log = LogManager.GetLogger(log4netRepository.Name, "NETCorelog4net");

            log.Info("NETCorelog4net log");
            log.Info("test log");
            log.Error("error");
            log.Info("linezero");
            Console.ReadKey();
        }
    }
}