Question

Can log4net filter and replace matched log message?

<filter type="log4net.Filter.StringMatchFilter">
  <param name="AcceptOnMatch" value="false" />
  <param name="RegexToMatch" value="&lt;Code>.*&lt;/Code>" />
</filter>

This code can match the …content…of Code and not to write all message to file.

But, what I want is that save the message, and replace the content of Code with empty.

Thanks.

Answer 1

Never heard of such functionality in bundled filters.

You’ll probably have to do the job yourself by subclassing log4Net.Filter.FilterSkeleton or StringMatchFilter.

Then in your XML, you’ll only have to call

<filter type="Your.Application.TheFilterYouJustWrote">
  <param name="AcceptOnMatch" value="false" />
  <param name="RegexToMatch" value="&lt;Code>.*&lt;/Code>" />
</filter>