如何在 Core 中仅显示自定义日志记录 Asp.Net

Question

我创建了自己的自定义日志提供程序FileLogerProviderr来将日志保存到文件中。

我在程序中添加了自定义文件记录器提供程序.cs：

public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .ConfigureLogging((hostingContext, logging) => 
                {
                    logging.AddProvider(new FileLoggerProvider(Path.Combine(Directory.GetCurrentDirectory(), "logger.txt")));
                    logging.SetMinimumLevel(LogLevel.None);
                })
                .UseStartup<Startup>();

为了测试我添加了登录控制器：

public class HomeController : Controller
    {
        private ILogger<HomeController> logger;
        public HomeController(ILogger<HomeController> log)
        {
            logger = log;
        }
        public IActionResult Index()
        {
            logger.LogDebug($"test index path!!!");
            return View();
        }
}

工作，但是在除测试索引路径之外的文件中，我看到了许多其他信息。我不需要这些信息。我只需要将控制器中的日志保存在文件中。

Request starting HTTP/1.1 GET http://localhost:44339/  
Route matched with {action = "Index", controller = "Home", page = "", area = ""}. Executing action LoggingTest.Controllers.HomeController.Index (LoggingTest)
Executing action method LoggingTest.Controllers.HomeController.Index (LoggingTest) - Validation state: Valid
test index path!!!
Executed action method LoggingTest.Controllers.HomeController.Index (LoggingTest), returned result Microsoft.AspNetCore.Mvc.ViewResult in 11.8159ms.
Executing ViewResult, running view Index.
Executed ViewResult - view Index executed in 43.4928ms.
Executed action LoggingTest.Controllers.HomeController.Index (LoggingTest) in 224.1184ms
Request finished in 400.2906ms 200 text/html; charset=utf-8
Request starting HTTP/1.1 GET http://localhost:44339/favicon.ico  
Sending file. Request path: '/favicon.ico'. Physical path: 'C:UsersdborovskyprojectsLoggingTestLoggingTestwwwrootfavicon.ico'
Request finished in 39.8394ms 200 image/x-icon

我该如何解决这个问题？谢谢

更新appsettings.json

{
  "ConnectionStrings": {
    "DefaultConnection": "CONSTRING"
  },
  "Logging": {
    "LogLevel": {
      "Default": "None",
      "System": "None",
      "Microsoft": "None"
    }
  },
  "AllowedHosts": "*"
}

Answer 1

也许您希望使用配置来防止记录所有事件。

我建议您在配置服务(.从程序配置日志记录.cs至少你想记录虚拟主机事件(：

public void ConfigureServices(IServiceCollection services)
        {
            services.AddLogging(loggers=> 
            {
                loggers.AddConsole();
                loggers.AddDebug();
                loggers.AddProvider(new FileLoggerProvider(Path.Combine(Directory.GetCurrentDirectory(), "logger.txt")));
            });

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
        }

然后，您可以按如下方式进行配置(确保您已正确配置环境变体(：

{
  "ConnectionStrings": {
    "DefaultConnection": "CONSTRING"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Debug",
      "System": "None",
      "Microsoft": "None"
    }
  },
  "AllowedHosts": "*"
}

和实现：

public class HomeController : Controller
    {
        private ILogger<HomeController> logger;
        public HomeController(ILogger<HomeController> log)
        {
            logger = log;
        }
        public IActionResult Index()
        {
            logger.LogDebug($"test index path!!!");
            return View();
        }
}

这是Microsoft关于日志记录的非常好的文章：

https://learn.microsoft.com/en-us/aspnet/core/fundamentals/logging/?view=aspnetcore-2.2