在.NET CORE 3.1Web API项目中配置nLog的自定义布局渲染器

<?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">

  <targets>
    <target name="file" xsi:type="File" fileName="logs/${shortdate}.log"
            layout="${longdate} ${uppercase:${level}} ${message} ${exception:format=ToString}"/>
  </targets>

  <rules>
    <logger name="*" minlevel="Trace" writeTo="file" />
  </rules>
</nlog>

using Microsoft.Extensions.Logging;

public void ConfigureServices(IServiceCollection services)
{
    // 添加nLog
    services.AddLogging(loggingBuilder =>
    {
        loggingBuilder.ClearProviders();
        loggingBuilder.SetMinimumLevel(LogLevel.Trace);
        loggingBuilder.AddNLog();
    });

    // 其他服务配置...
}

using Microsoft.Extensions.Logging;

public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory)
{
    // 其他配置...

    // 启用nLog中间件
    loggerFactory.AddNLog();
    app.UseMiddleware<NLogMiddleware>();

    // 其他配置...
}

using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;

[ApiController]
[Route("api/[controller]")]
public class MyController : ControllerBase
{
    private readonly ILogger<MyController> _logger;

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

    [HttpGet]
    public IActionResult Get()
    {
        _logger.LogInformation("This is a log message.");

        // 其他操作...

        return Ok();
    }
}