NLog.config是否未在asp.net core 2.1项目中加载？

Question

I have the following 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"
      xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd"
      autoReload="true"
      throwExceptions="false"
      internalLogLevel="On" internalLogFile="c:\temp\nlog-internal.log">
  <targets>
    <target xsi:type="File" name="f" fileName="${basedir}/logs/${shortdate}.log"
            layout="${longdate} ${uppercase:${level}} ${message}" />
  </targets>
  <rules>
    <logger name="*" minlevel="Trace" writeTo="f" />
  </rules>
</nlog>

And then i have followed the following tutorial But i replaced

public static IWebHost BuildWebHost(string[] args) =>
    WebHost.CreateDefaultBuilder(args)
        .UseStartup<Startup>()
        .ConfigureLogging(logging =>
        {
            logging.ClearProviders();
            logging.SetMinimumLevel(Microsoft.Extensions.Logging.LogLevel.Trace);
        })
        .UseNLog()  // NLog: setup NLog for Dependency injection
        .Build();

with

public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
    WebHost.CreateDefaultBuilder(args)
        .UseStartup<Startup>()
        .ConfigureLogging(logging =>
        {
            logging.ClearProviders();
            logging.SetMinimumLevel(LogLevel.Trace);
        })
        .UseNLog();

But nothing is written to the specified file or the internal log no matter what i do.

I have also tried to quickwatch NLog.Web.NLogBuilder.ConfigureNLog("nlog.config") and it seems no rules or targets are loaded?

I have also verified that nlog.config exists in the build directory bin\\Debug\\netcoreapp2.1\\ and as the right content.

I have also tried to put the absolute path to the file in the NLog.Web.NLogBuilder.ConfigureNLog but that didn't help.

Answer 1

internalLogLevel="on" should be internalLogLevel="Trace" .

You can add the option throwConfigExceptions="true" next to throwExceptions="false" . It will help you track down errors in the NLog.config. It is actually a good idea to have throwConfigExceptions="true" even when in production environments (Unlike throwExceptions="true" , which should only be used for unit-testing of NLog)