CODEWITHSUNDEEP
c#.netlogginglog4net
DTI-Matt
DTI-Matt

Reputation: 2135

Custom Log4Net filter level not writing to log

I've tried this with no success: How do I filter on a custom level in log4net

Here is the code I'm using:

public static class SpecialLogging
{
    public static readonly log4net.Core.Level specialLevel = new log4net.Core.Level(35000, "SPECIAL");

    public static void Special(this ILog log, string message)
    {
        log.Logger.Log(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType,
        specialLevel, message, null);
    }
}

Here's me testing it:

private static void Main()
{
    //Logger
    LogManager.GetRepository().LevelMap.Add(SpecialLogging.specialLevel);
    ILog log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
    log.Special("Special");
}

And finally here my log4net.config file:

<log4net>
  <appender name="RollingLogFileAppenderDebug" type="log4net.Appender.RollingFileAppender">
    <file value="./Logs/DEBUG.log" />
    <appendToFile value="false" />
    <rollingStyle value="Size" />
    <maxSizeRollBackups value="3" />
    <maximumFileSize value="5GB" />
    <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />

    <filter type="log4net.Filter.LevelRangeFilter">
      <acceptOnMatch value="true" />
      <levelMin value="DEBUG" />
      <levelMax value="FATAL" />
    </filter>

    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date{G} [%thread] (%stacktrace) %5level - %message%newline" />
    </layout>
  </appender>

  <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
    <file value="./Logs/Special.log" />
    <appendToFile value="false" />
    <rollingStyle value="Size" />
    <maxSizeRollBackups value="3" />
    <maximumFileSize value="5GB" />
    <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />

    <filter type="log4net.Filter.LevelMatchFilter">
      <acceptOnMatch value="true" />
      <levelToMatch value="SPECIAL" />
    </filter>
    <filter type="log4net.Filter.DenyAllFilter" />

    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date{G} [%thread] (%stacktrace) %5level - %message%newline" />
    </layout>
  </appender>

  <!-- Set the default logging level and add the active appenders -->
  <root>
    <level value="ALL" />
    <appender-ref ref="RollingLogFileAppender" />
    <appender-ref ref="RollingLogFileAppenderDebug" />
  </root>

</log4net>

The special messages appear in the Debug.log file, but the Special.log file is empty!

Upvotes: 2

Views: 5754

Answers (1)

sgmoore
sgmoore

Reputation: 16067

You missed Olle's answer from the question you linked to.

Firstly rule of thumb for all log4net issues is to enable internal debugging.

In this case, if you add 

log4net.Util.LogLog.InternalDebugging = true;

to the start of your main, then you would probably see the error

log4net:ERROR XmlHierarchyConfigurator: Unknown Level Specified [SPECIAL]
log4net:WARN Unable to set property [levelToMatch] on object [log4net.Filter.LevelMatchFilter] using value [SPECIAL] (with acceptable conversion types)

So the solution is to add this information to your log4net config section, i.e.

<level>
  <name value="SPECIAL" />
  <value value="35000" />
</level>

Upvotes: 9

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