NLog filter based on time of the day

Question

I am trying to use NLog conditions to filter messages that are not generated at certain time

the following is my sample

<logger name="*" minlevel="Info" writeTo="InfoMail" >
  <when condition="starts-with('${date:format=hh}', '01')" action="Ignore"/>
</logger>

However, Nlog seemed not able to pick up '${date:format=hh}' and I still receive email even the messages are generated at one o'clock. Is there any way to get around this?

Answer 1

The when conditions should be put inside a filters element as show in Conditions - Examples and specified in the NLog.xsd (the syntax on the When filter page is wrong)

So the correct usage is:

<logger name="*" minlevel="Info" writeTo="Console" >
  <filters>
    <when condition="starts-with('${date:format=hh}', '01')" action="Ignore"/>
  </filters>
</logger>