.NET 4.5控制台应用程序中的NLog：未加载配置

Question

I have some console apps I've written at work. I'd like to get NLog into them but I am having trouble. When I inspect the 'logger' object, I see in it's 'Factory' property, that the configuration had targets=0, loggingrules=0, everything blank or unset. So, it doesn't do ANYTHING.. doesn't drop an internal log file either... I have tried nLog.config NLog.config and nlog.config... to no avail. Tried ver 3 and 4 of NLog too...

Why would it not pick up the config?

I have:

• NLog.config in the root with 'Content' for build action and 'Copy Always' set
• Confirmed the NLog.config IS being copied to the bin

Here's the NLog.config:

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      autoReload="true"
      throwConfigExceptions="true"
      throwExceptions="true"
      internalLogLevel="Trace"
      internalLogFile="c:\temp\NlogInternal.log"
      internalLogToConsole="true"
      internalLogToConsoleError="true"
      internalLogToTrace="true">
  <targets>
    <target xsi:type="Console" name="debugConsole" layout="${message} "/>
    <target xsi:type="File" name="debugFile" createDirs="true" fileName="c:\temp\testlog.log" layout="${longdate} ${uppercase:${level}} ${message}"/>
  </targets>
  <rules>
    <logger name="*" minlevel="Trace" writeTo="debugConsole"/>
    <logger name="*" minlevel="Trace" writeTo="debugFile"/>    
  </rules>
</nlog>

and finally (this doesn't error, but nothing is output since the config is blank):

private static Logger logger = LogManager.GetCurrentClassLogger();
logger.Info("ConsoleApp test log...");

Answer 1

Do your app.config have a NLog configSection? Something like this:

<configuration>
  <configSections>
    <section name="nlog" type="NLog.Config.ConfigSectionHandler, NLog"/>
  </configSections>
  <nlog>
  </nlog>
</configuration>

Answer 2

If even the internalLogger isn't working, you could debug the issue by setting the InternalLogger.LogWriter

eg

 // enable internal logging to a custom TextWriter
    InternalLogger.LogWriter = new StringWriter(); //e.g. TextWriter writer = File.CreateText("C:\\perl.txt")

Answer 3

I got the same issue on my end. When you make change your fileName Path "c:\\temp\\testlog.log" to "c:/temp/testlog.log" then it will work. Hope the below snipet help you to resolve the issue.

<targets>
  <target xsi:type="Console" name="debugConsole" layout="${message} "/>
  <target xsi:type="File" name="debugFile" createDirs="true" 
      fileName="c:/temp/testlog.log" layout="${longdate} ${uppercase:${level}} 
      ${message}"/>
 </targets>
 <rules>
    <logger name="*" minlevel="Trace" writeTo="debugConsole"/>
    <logger name="*" minlevel="Trace" writeTo="debugFile"/>
 </rules>