log4net 1附加器2文件

Question

Is there a possibility to have one appender for log4net that would log information to two files if it meets treshold level. It it is INFO level it will write everything besides debug if it is debug, it writes everything including debug and just keep those two. I could do it with two appenders, however I want to have only one variable that would figure out based on treshold level to which log file write, to only one, or to both.

  <appender name="Name" type="log4net.Appender.RollingFileAppender,log4net"> <file value="Path" /> <treshold value="info" /> <appendToFile value="true" /> <lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> <rollingStyle value="Size" /> <maxSizeRollBackups value="5" /> <maximumFileSize value="2000KB" /> <staticLogFileName value="true" /> <layout type="log4net.Layout.PatternLayout"> <Header value="[Start]&#13;&#10;" /> <Footer value="[End]&#13;&#10;" /> <ConversionPattern value="%-5level %message%newline" /> </layout> </appender> 

Answer 1

You can configure log4net to have individual log messages write to two (or more) different files. You can even have each file use a different threshold value.

Here is an example with two log files, one called basic.log that includes INFO or higher messages, and one called details.log that includes DEBUG or higher messages. The sample shows that a log.Debug() call will have its output go to just the details.log file, and a log.Info() call will have its output in both files.

Here is the main program:

class Program
{
    private static readonly log4net.ILog log = log4net.LogManager.GetLogger(typeof(Program));
    static void Main(string[] args)
    {
        log4net.Config.XmlConfigurator.Configure();
        log.Debug("This is a debug message");
        log.Info("This is an info message");
    }
}

And the app.config file:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
  </configSections>
  <startup> 
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.1" />
  </startup>

  <log4net>
    <appender name="BasicFile" type="log4net.Appender.RollingFileAppender, log4net">
      <file value="C:\temp\basic.log"/>
      <threshold value="INFO"/>
      <appendToFile value="True"/>
      <layout type="log4net.Layout.PatternLayout">
        <Header value="[Start]&#13;&#10;" />
        <Footer value="[End]&#13;&#10;" />
        <ConversionPattern value="%-5level %message%newline" />
      </layout>
    </appender>

    <appender name="DetailsFile" type="log4net.Appender.RollingFileAppender, log4net">
      <file value="C:\temp\details.log"/>
      <threshold value="DEBUG"/>
      <appendToFile value="True"/>
      <layout type="log4net.Layout.PatternLayout">
        <Header value="[Start]&#13;&#10;" />
        <Footer value="[End]&#13;&#10;" />
        <ConversionPattern value="%-5level %message%newline" />
      </layout>
    </appender>

    <root>
      <level value="DEBUG"/>
      <appender-ref ref="BasicFile"/>
      <appender-ref ref="DetailsFile"/>
    </root>
  </log4net>
</configuration>

When I run this, c:\\temp\\basic.log has just the INFO message, and c:\\temp\\details.log has both messages.