.net Core Nlog使用

为项目增加程序集

using NLog.Extensions.Logging;

启动文件中增加Nlog注入

//增加Nlog日志
builder.Services.AddLogging(builder => { builder.AddNLog(); });

默认读取nlog.config文件，参考配置如下：

<?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"
      throwConfigExceptions="true"
      internalLogLevel="info"
      internalLogFile="internal-nlog.txt">
 
  <!-- 布局规则 -->
  <targets>
    <!-- 文件目标 -->
    <target xsi:type="File" name="f" fileName="logs/${shortdate}.log" layout="${longdate} ${uppercase:${level}} ${message}" />
    <target xsi:type="File" name="nn" fileName="logs/$nn-{shortdate}.log" layout="${longdate} ${uppercase:${level}} ${message}" />


  </targets>
 
  <!-- 规则 -->
  <rules>
    <!-- 所有 log 级别的消息都使用 'f' 目标 -->
    <logger name="*" minlevel="Debug" writeTo="f" />
 
    <logger name="aa.*" minlevel="Debug" writeTo="nn"  />
  </rules>
</nlog>

 控制器使用示例：

 public class DepartmentController : Controller
 {
     private  ILogger<DepartmentController> _logger;


     public DepartmentController(ILogger<DepartmentController> _logger)
     {
         this._logger = _logger;
     }

     [HttpGet("api/Department/Index")]
     public IActionResult Index()
     {
         _logger.LogInformation("日志测试");
         _logger.LogInformation("日志测试2");
         _logger.LogDebug("日志测试2");



         return View();
     }
 }