C# 怎么使用 Serilog 或 NLog 记录日志_C# 日志记录框架使用指南

Install-Package Serilog
Install-Package Serilog.Sinks.Console
Install-Package Serilog.Sinks.File

using Serilog;

var builder = WebApplication.CreateBuilder(args);

// 配置 Serilog
Log.Logger = new LoggerConfiguration()
    .WriteTo.Console()
    .WriteTo.File("logs/log.txt", rollingInterval: RollingInterval.Day)
    .CreateLogger();

// 使用 Serilog 作为日志提供者
builder.Host.UseSerilog();

var app = builder.Build();

app.MapGet("/", () => "Hello World!");

app.Run();

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

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

    public void Index()
    {
        _logger.LogInformation("用户访问了首页");
        _logger.LogWarning("这是一个警告");
        _logger.LogError("发生了一个错误");
    }
}

_logger.LogInformation("用户 {UserId} 在 {LoginTime} 登录", 123, DateTime.Now);

Install-Package NLog
Install-Package NLog.Web.AspNetCore

<?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="logs/internal-nlog.txt">

  <targets>
    <target xsi:type="File" name="fileTarget" fileName="logs/${shortdate}.log"
            layout="${longdate} ${level:uppercase=true} ${message} ${exception}" />
    <target xsi:type="Console" name="consoleTarget"
            layout="${colored-level} ${message} ${exception}" />
  </targets>

  <rules>
    <logger name="*" minlevel="Trace" writeTo="fileTarget,consoleTarget" />
  </rules>
</nlog>

using NLog.Web;

var builder = WebApplication.CreateBuilder(args);

// 添加 NLog
builder.Host.UseNLog();

var app = builder.Build();

app.MapGet("/", () => "Hello NLog!");

app.Run();

_logger.LogInformation("请求处理完成，响应状态：{StatusCode}", 200);