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Editorial Team
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Asked: 2026-06-18T04:08:24+00:00

Trying to get some basic ASP.NET Web API Tracing happening using NLog. After a

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Trying to get some basic ASP.NET Web API Tracing happening using NLog.

After a lot of searching the only documentation I could find is here: http://nlog-project.org/2010/09/02/routing-system-diagnostics-trace-and-system-diagnostics-tracesource-logs-through-nlog.html

The above isnt for the Web API but I have tried to adapt it, the problem seems to be in my Web.Config:

<system.diagnostics>
    <sources>
      <source name="System.Web.Http.ApiController" switchValue="All">        
        <listeners>
          <add name="nlog" />
        </listeners>
      </source>
    </sources>
    <sharedListeners>
      <add name="nlog" type="NLog.NLogTraceListener, NLog" />
    </sharedListeners>
  </system.diagnostics>

Any ideas why it’s not working or references to an example?

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1 Answer

  1. Editorial Team

    Yes I have written an article on how to implement NLog as an ITraceWriter provider for Web API.

    It was written against Web API RC but it should work fine with RTM as well: http://www.strathweb.com/2012/06/using-nlog-to-provide-custom-tracing-for-your-asp-net-web-api/

    There is also an example on GitHub, by Dave Bettin – https://github.com/dbettin/webapi.nlog

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