参考

• https://github.com/serilog/serilog-aspnetcore
• https://github.com/serilog/serilog
• https://github.com/serilog/serilog-sinks-rollingfile

安装 serilog

$ dotnet add package Serilog.AspNetCore
$ dotnet add package Serilog.Settings.Configuration

$ dotnet add package Serilog.Sinks.Console
$ dotnet add package Serilog.Sinks.RollingFile

配置文件修改

安装组件 Serilog.Settings.Configuration 后，serilog就可以使用 .net core 的配置文件了

appsettings.json

{
  "Serilog": {
    "WriteTo": [
      {
        "Name": "RollingFile",
        "Args": { "pathFormat": "log-{Date}.txt" }
      }
    ],
    "MinimumLevel": {
      "Default": "Debug",
      "Override": {
        "Microsoft": "Warning",
        "System": "Warning"
      }
    }
  }
}

安装 Serilog.Sinks.RollingFile 后，可以将日志输出到以日期组织的文件中，可在配置文件中设置文件生成的规则及路径。

将 serilog 作为中间件注入

Program.cs

....
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using Serilog;
using Serilog.Events;

namespace Demo.API
{
    public class Program
    {
        public static void Main(string[] args)
        {
            CreateWebHostBuilder(args).Build().Run();
        }
        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
            .UseStartup<Startup>().UseSerilog((hostingContext, loggerConfiguration) => loggerConfiguration
            .ReadFrom.Configuration(hostingContext.Configuration)
            .Enrich.FromLogContext()
            .WriteTo.Console());
            ## 注入 serilog
    }
}

在控制器中使用日志组件

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;

namespace Demo.API.Controllers
{
    [Authorize]
    [Route("Api/[controller]")]
    [ApiController]
    public class UserController : ControllerBase
    {
        private readonly UserManager<UserIdentity> _userManager;
        private readonly ILogger _logger;

        public UserController(UserManager<UserIdentity> userManager, ILoggerFactory logFactory)
        {
            _userManager = userManager;
            _logger = logFactory.CreateLogger<UserController>();
        }

        /// <summary>
        /// 用户注册
        /// </summary>
        /// <param name="model">注册实体模型</param>
        /// <returns></returns>
        [Route("Register")]
        [AllowAnonymous]
        [HttpPost]
        public async Task<ApiResult> Register(RegisterModel model)
        {
            _logger.LogInformation("开始注册=", model.PhoneNumber);

            if (!ModelState.IsValid)
            {
                return ApiResultUtil.Fail("数据不合法!");
            }
            try
            {   
                IdentityResult result = null;
                var user = await _userManager.FindByNameAsync(model.UserName);

                if (user != null)
                    return ApiResultUtil.Fail("注册失败: 帐号重复");

                user = new UserIdentity { UserName = model.UserName, Email = model.Email, PhoneNumber = model.PhoneNumber };
                result = await _userManager.CreateAsync(user, model.Password);

                if (result.Succeeded)
                {
                    return ApiResultUtil.Success();
                }
                else
                {
                    return ApiResultUtil.Fail("注册失败！");
                }
            }
            catch (Exception ex)
            {   
                _logger.LogError(0, ex, "注册失败：" + ApiResultUtil.GetMessage(ex));
                return ApiResultUtil.Fail("注册失败！");
            }
        }
    }
}