netcore2.0 使用NLog记录日志

1. 新建netcore2.0项目

2.右键 “依赖项” -> “管理NuGet程序包...”

搜索NLog.Web.AspNetCore,版本为v4.5.0-rc2 并安装。
新建一个NLog.config文件，文件内容如下：

<?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"
      internalLogLevel="info"
      internalLogFile="c:	empinternal-nlog.txt">


  <!-- the targets to write to -->
  <targets>
    <!-- write logs to file  -->
    <target xsi:type="File" name="allfile" fileName="c:	emp
log-all-${shortdate}.log"
            layout="${longdate}|${event-properties:item=EventId.Id}|${uppercase:${level}}|${logger}|${message} ${exception}" />

    <!-- another file log, only own logs. Uses some ASP.NET core renderers -->
    <target xsi:type="File" name="ownFile-web" fileName="c:	emp
log-own-${shortdate}.log"
            layout="${longdate}|${event-properties:item=EventId.Id}|${uppercase:${level}}|${logger}|${message} ${exception}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}|${callsite}" />

    <!-- write to the void aka just remove -->
    <target xsi:type="Null" name="blackhole" />
  </targets>

  <!-- rules to map from logger name to target -->
  <rules>
    <!--All logs, including from Microsoft-->
    <logger name="*" minlevel="Trace" writeTo="allfile" />

    <!--Skip Microsoft logs and so log only own logs-->
    <logger name="Microsoft.*" minlevel="Trace" writeTo="blackhole" final="true" />
    <logger name="*" minlevel="Trace" writeTo="ownFile-web" />
  </rules>
</nlog>

3. 修改文件属性

复制到输出目录->始终复制

4.在HomeController添加如下代码：

       private ILogger<HomeController> logger;

        public HomeController(ILogger<HomeController> _logger)
        {
            logger = _logger;
        }

5. 在使用的地方调用logger.LogXXX("Hello,Index");即可输出日志。