log4net - conversionPattern per level for single FileAppender? - configuration

Question

While it is not difficult to setup different log files, each with a different conversionPattern, per level, I would like to have minimal logging for all but errors, where I'd like a detailed log entry. Here's a snippet of my current configuration:
<appender name="WarningsAndBelowFileAppender" type="log4net.Appender.FileAppender">
<file value="log.txt" />
<appendToFile value="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%m%n" />
</layout>
<filter type="log4net.Filter.LevelRangeFilter">
<levelMax value="WARN" />
</filter>
</appender>
<appender name="ErrorsFileAppender" type="log4net.Appender.FileAppender">
<file value="errors.txt" />
<appendToFile value="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%d [%t] %-5p %c [%x] - %m%n" />
</layout>
<threshold value="ERROR" />
</appender>
I'd love to have both of these configurations go into a single log file, just have different conversionPatterns for each. Can this be done?

Answer 1

you can't do it within the config file but you can make it with pattern layout converter.
See information here
This should be the converted code:
class MyMessageConverter : PatternLayoutConverter
{
protected override void Convert(TextWriter writer, LoggingEvent loggingEvent)
{
if (loggingEvent.Level.Value <= Level.Warn.Value)
{
writer.Write(loggingEvent.RenderedMessage);
}
else
{
writer.Write("{0} [{1}] {2,5} {3} - {4}",
loggingEvent.TimeStamp,
loggingEvent.ThreadName,
loggingEvent.Level.Name,
loggingEvent.LocationInformation.ClassName,
loggingEvent.RenderedMessage);
}
}
}
And here is the config file:
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file value="log.txt" />
<appendToFile value="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%MSG%n" />
<converter>
<name value="MSG" />
<type value="yournamespace.MyMessageConverter " />
</converter>
</layout>
</appender>