mac .netcore Nlog使用

1.mac 文件目录不同于 windows ，文件输出目录考虑修改为
/users/xuxun/downloads/nlog/internal-nlog.txt
（修改nlog.config 文件）
2.下载依赖
NLog.Web.AspNetCore。4.8.0
NLog 4.5.11
3.官网地址：https://github.com/NLog/NLog/wiki/Getting-started-with-ASP.NET-Core-2

4.添加-新建文件-misc-配置文件-nlog。 （nlog.config）
修改如下：

          <?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="/users/xuxun/downloads/nlog/internal-nlog.txt">

      <!-- enable asp.net core layout renderers -->
      <extensions>
        <add assembly="NLog.Web.AspNetCore"/>
      </extensions>

      <!-- the targets to write to -->
      <targets>
        <!-- write logs to file  -->
        <target xsi:type="File" name="allfile" fileName="/users/xuxun/downloads/nlog/temp/nlog-all-${shortdate}.log"
                layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}" />

        <!-- another file log, only own logs. Uses some ASP.NET core renderers -->
        <target xsi:type="File" name="ownFile-web" fileName="/users/xuxun/downloads/nlog/temp/nlog-own-${shortdate}.log"
                layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}" />
      </targets>

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

        <!--Skip non-critical Microsoft logs and so log only own logs-->
        <logger name="Microsoft.*" maxlevel="Info" final="true" /> <!-- BlackHole without writeTo -->
        <logger name="*" minlevel="Trace" writeTo="ownFile-web" />
      </rules>
    </nlog>

5.修改program文件

         public class Program
{
    public static void Main(string[] args)
    {
        // NLog: setup the logger first to catch all errors
        var logger = NLog.Web.NLogBuilder.ConfigureNLog("nlog.config").GetCurrentClassLogger();
        try
        {
            logger.Debug("init main");
            CreateHostBuilder(args).Build().Run();
        }
        catch (Exception ex)
        {
            //NLog: catch setup errors
            logger.Error(ex, "Stopped program because of exception");
            throw;
        }
        finally
        {
            // Ensure to flush and stop internal timers/threads before application-exit (Avoid segmentation fault on Linux)
            NLog.LogManager.Shutdown();
        }
    }

    public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseStartup<Startup>().ConfigureLogging(logging =>
                {
                    logging.ClearProviders();
                    logging.SetMinimumLevel(Microsoft.Extensions.Logging.LogLevel.Trace);
                })
                .UseNLog();
            });

}

6. 配置appseting.json

   {
   "Logging": {
   "LogLevel": {
   "Default": "Trace",
   "Microsoft": "Information"
   }
   }
   }

7.在控制器中引用：

    using Microsoft.Extensions.Logging;

  public class HomeController : Controller
{
private readonly ILogger<HomeController> _logger;

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

public IActionResult Index()
{
    _logger.LogInformation("Index page says hello");
    return View();
}