AspNetCore中使用Serilog记录日志

一、安装包

 第一个是主包，第二个是将日志输出到控制台，第三个是将日志输出到文件中；

二、在Program.cs中配置

public class Program
    {
        public static void Main(string[] args)
        {
            Log.Logger = new LoggerConfiguration()
            .MinimumLevel.Debug()
            .Enrich.FromLogContext().WriteTo.Console()

            // 1. for debug file sink
            .MinimumLevel.Override("Microsoft.AspNetCore", LogEventLevel.Debug)
            .WriteTo.File($@".Logs{DateTime.Now.Year}-{DateTime.Now.Month}{DateTime.Now.Day}InfoInfo.txt", restrictedToMinimumLevel: LogEventLevel.Debug, rollingInterval: RollingInterval.Day)

            //2. for error file sink
            .WriteTo.File($@".Logs{DateTime.Now.Year}-{DateTime.Now.Month}{DateTime.Now.Day}ErrorError.txt", restrictedToMinimumLevel: LogEventLevel.Error, rollingInterval: RollingInterval.Day)
            .CreateLogger();
            

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

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureLogging(loggingBuilder =>
                {
                    //清空所有日志提供程序,包括aspnetcore框架自带的控制台、调试窗口等
                    loggingBuilder.ClearProviders();
                })
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                })
            .UseSerilog(/*(hostingContext, loggerConfiguration) =>
                //从appsettings.json中读取配置
                loggerConfiguration.ReadFrom.Configuration(hostingContext.Configuration)
                .Enrich.FromLogContext()*/);
    }

其中注释掉的UseSerilog中的内容是去appsetting.json中读取配置，因为写到文件夹中的路径我是写死在上边的；

如果要在appsetting.json中配置：

//"Serilog": {
  //  "WriteTo": [
  //    {
  //      "Name": "File",
  //      "Args": {
  //        "path": "./Logs/.txt",
  //        "rollingInterval": "Day"
  //      }
  //    },
  //    {
  //      "Name": "Console",
  //      "Args": {}
  //    }
  //  ]
  //}

三、使用

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

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

        [HttpPost]
        public async Task<IActionResult> InitSpider([FromBody] TaskItemDTo taskItemDto)
        {
            try
            {
                int i = 0;
                int j = 1;
                var a = j / i;
                return Ok();
            }
            catch (Exception ex)
            {
                _logger.LogError(ex,ex.Message);
                return BadRequest();
            }
        }
}

结果：

 我是将Debug级以上的保存在Info中，将Error级的保存在Error中；