CSharp log4net

Written by BGKim, VCANUS

log4net

log4net NuGet 설치

config 파일 추가

log4net.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <log4net>
    <root>
      <level value="ALL"/>
      <appender-ref ref="console"/>
      <appender-ref ref="file"/>
      <appender-ref ref="warn_file"/>
    </root>
    <appender name="console" type="log4net.Appender.ConsoleAppender">
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %level %logger %M - %message%newline" />
      </layout>
    </appender>
    <appender name="file" type="log4net.Appender.RollingFileAppender">
      <lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
      <file value=".\log\" />
      <datePattern value="yyyyMMdd'_app.log'" />
      <staticLogFileName value="false" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <maxSizeRollBackups value="10" />
      <maximumFileSize value="30MB" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %level %logger %M - %message%newline" />
      </layout>
    </appender>
    <appender name="warn_file" type="log4net.Appender.RollingFileAppender">
      <lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
      <file value=".\log\" />
      <datePattern value="yyyyMMdd'_warn.log'" />
      <staticLogFileName value="false" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <maxSizeRollBackups value="10" />
      <maximumFileSize value="30MB" />
      <filter type="log4net.Filter.LevelRangeFilter">
        <param name="LevelMin" value="WARN" />
        <param name="LevelMax" value="FATAL" />
      </filter>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %level %logger %M - %message%newline" />
      </layout>
    </appender>
  </log4net>
</configuration>

config 파일 속성 변경

1. config 파일 우클릭, 속성 선택
2. 빌드 작업 => ‘내용’ 으로 변경
3. 출력 디렉터리에 복사 => ‘항상 복사’ 로 변경

프로젝트 AssemblyInfo.cs 수정

AssemblyInfo.cs 내용 추가

[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", Watch = true)]

사용법

public class logTest
{
    private static readonly ILog log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

	public void TestMethod1()
    {
        log.Debug("Main() started");
        log.Info("My Info");
        log.Warn("My Warning");
        log.Error("My Error");
        log.Fatal("My Fatal Error");
    }
}