使用JSON格式将NLog正确配置为IHostBuilder

{
  "nlog": {
    "targets": {
      "file": {
        "type": "File",
        "fileName": "${basedir}/logs/log.txt",
        "layout": "${longdate} ${level} ${message}"
      }
    },
    "rules": [
      {
        "logger": "*",
        "minLevel": "Info",
        "writeTo": "file"
      }
    ]
  }
}

using Microsoft.Extensions.Hosting;
using NLog.Web;

public class Program
{
    public static void Main(string[] args)
    {
        var host = CreateHostBuilder(args).Build();
        host.Run();
    }

    public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseStartup<Startup>();
            })
            .ConfigureLogging(logging =>
            {
                logging.ClearProviders();
                logging.SetMinimumLevel(LogLevel.Trace);
            })
            .UseNLog(); // 添加此行以启用NLog

}

using Microsoft.Extensions.Logging;

public class Startup
{
    private readonly ILogger<Startup> _logger;

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

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        // ...

        _logger.LogInformation("Hello, NLog!");

        // ...
    }
}