netcore使用日志(Serilog)

nuget

dotnet add package Serilog.AspNetCore

配置Program.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Serilog;

namespace Snblog
{
    public class Program
    {

        public static IConfiguration Configuration { get; } = new ConfigurationBuilder()
       .SetBasePath(Directory.GetCurrentDirectory())
       .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
       .AddJsonFile($"appsettings.{Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? "Production"}.json", optional: true)
       .AddEnvironmentVariables()
       .Build();

        public static void Main(string[] args)
        {
            Log.Logger = new LoggerConfiguration()
         .ReadFrom.Configuration(Configuration)
         .Enrich.FromLogContext()
         .CreateLogger();
            try
            {
                Log.Information("启动主机");
                CreateHostBuilder(args).Build().Run();
            }
            catch (Exception ex)
            {
                Log.Fatal(ex, "主机意外终止");
            }
            finally
            {
                Log.CloseAndFlush();
            }

            //CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
             .UseSerilog() // <-添加此行
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });
    }
}

配置appsettings.json

  //"Logging": {
  //  "LogLevel": {
  //    "Default": "Information",
  //    "Microsoft": "Warning",
  //    "Microsoft.Hosting.Lifetime": "Information"
  //  }
  //},
  
  //注释以上
  //增加以下
  "Serilog": {
    "MinimumLevel": {
      "Default": "Information",
      "Override": {
        "Microsoft": "Warning",
        "System": "Warning"
      }
    },
    "WriteTo": [
      { "Name": "Console" },
      {
        "Name": "File",
        "Args": {
          "path": ".\\LogFiles\\log.txt",
          "rollingInterval": "Day",
          //"theme": "Serilog.Sinks.SystemConsole.Themes.AnsiConsoleTheme::Code, Serilog.Sinks.Console",
          //  "outputTemplate": "Occurrence Time: {Timestamp:HH:mm:ss.fff} Level: {Level} Detailed Information: {Message}{NewLine}{Exception}"

        }
      }
    ],
    "Enrich": [ "FromLogContext", "WithMachineName", "WithThreadId" ]
  },

在控制器使用

private readonly ILogger < SnArticleController > logger;
public SnArticleController(ILogger < SnArticleController > logger)
    {
        this.logger = logger ? ?
            throw new ArgumentNullException(nameof(logger));
    }
    /// <summary>
    /// 查询总数 (缓存)
    /// </summary>
    [HttpGet("GetArticleCount")]
    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
    [ProducesResponseType(StatusCodes.Status200OK)]
    [ProducesDefaultResponseType]
public IActionResult GetArticleCount()
{
    logger.LogInformation("启动{ActionName}", "获取所有待办事项"); // <-添加此行
    return Ok(_service.GetArticleCount());
}