如何过滤aspnet core日志？

Question

Microsoft 为 ASP.NET Core 2.1 提供的以下样板文件 C# 代码应防止仅写入信息日志。但事实并非如此。

    public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
        .ConfigureAppConfiguration((hostingContext, config) =>
        {
            var env = hostingContext.HostingEnvironment;
            config.AddEnvironmentVariables();
        })
        .ConfigureLogging((hostingContext, logging) =>
        {
            logging.AddConsole();
            logging.AddDebug();
            logging.AddEventSourceLogger();
        })
        .ConfigureLogging(logging => logging.SetMinimumLevel(LogLevel.Warning))
        .UseStartup<Startup>();

我仍然看到如下消息：

MyApp> info: Microsoft.AspNetCore.Mvc.RazorPages.Internal.PageActionInvoker[2]

和

Microsoft.AspNetCore.Mvc.RazorPages.Internal.PageActionInvoker:Information: Executed action /Index in 11.2286ms

我特意删除了（暂时）调用 AppSettings.json 的代码。为什么我仍然看到信息严重性日志项？

Answer 1

尝试在您的代码中进行以下更改，将第一个 AddFilter 的类别设置为 null

 public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
            .ConfigureAppConfiguration((hostingContext, config) =>
            {
                var env = hostingContext.HostingEnvironment;
                config.AddEnvironmentVariables();
            })
            .ConfigureLogging((hostingContext, logging) =>
            {
                logging.AddConsole();
                logging.AddFilter(null, LogLevel.Warning);

            })
            .UseStartup<Startup>()
            .ConfigureLogging(logging => logging.AddFilter("Microsoft", LogLevel.Warning));

添加 logWarning 以在 Home/Index

中进行测试

 private readonly ILogger _logger;
    public IndexModel(ILogger<IndexModel> logger)
    {
        _logger = logger;
    }
    public void OnGet()
    {
        _logger.LogInformation("Log Information");
        _logger.LogWarning("Log Warning");
    }

结果截图

Answer 2

对我来说，它使用 AddFilter<>() 通用方法（我正在使用 ASP.Net Core 3.1）。我正在登录 windows 事件日志，我只希望那里出现警告和错误。因此，我向 EventLogLoggerProvider 添加了一个过滤器，以仅记录来自“Microsoft”类别的警告。

services.AddLogging(logging =>
        {
            logging.AddEventLog(eventLogSettings =>
            {
                eventLogSettings.LogName = Constants.Service.EventLogName;
                eventLogSettings.SourceName = Constants.Service.EventSourceName;
            });
            logging.AddFilter<EventLogLoggerProvider>("Microsoft", LogLevel.Warning);
        });

如何过滤aspnet core日志？

How to filter aspnet core logs?

c#

logging

asp.net-core-2.0