asp.net core 3 使用nlog日志组件，使用$ {basedir}保存位置不对，记录下怎么解决

$ {basedir}指向的是  AppDomain.CurrentDomain.BaseDirectory，

Asp.Net.Core的解决方法可能如下（在Program.cs中添加两行）：

var appBasePath = System.IO.Directory.GetCurrentDirectory();

NLog.GlobalDiagnosticsContext.Set("appbasepath", appBasePath);

var logger = LogManager.LoadConfiguration("nlog.config").GetCurrentClassLogger();

然后，您可以${gdc:item=appbasepath}在nlog.config：

<?xml version="1.0"?>

<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"

      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

      autoReload="true"

      internalLogLevel="Warn"

      internalLogFile="${gdc:item=appbasepath}\log\internal-nlog.txt">

  <extensions>

    <add assembly="NLog.Web.AspNetCore"/>

  </extensions>

  <targets async="true">

    <target name="ownfile" xsi:type="File"

            concurrentWrites="true"

            keepFileOpen="true"

            fileName="${gdc:item=appbasepath}\log\nlog-${shortdate}.log"

            encoding="utf-8"

            layout="${longdate}|${machinename}|${uppercase:${level}}|${logger}|${message}|${exception:format=tostring}|${aspnet-request-method}|${aspnet-traceidentifier}|${aspnet-request-ip}|${aspnet-request-url}|${aspnet-mvc-action}" />

  </targets>

  <rules>

    <!--Skip non-critical Microsoft logs and so log only own logs-->

    <logger name="Microsoft.*" maxLevel="Info" final="true" />

    <logger name="*" minlevel="Info" writeTo="ownfile" />

  </rules>

</nlog>

 本文出自：http://tianfeng.cc/Article/5879