如何过滤aspnet核心日志?

时间:2018-12-09 22:54:59

标签: c# logging asp.net-core-2.0

下面的样板程序,Microsoft为ASP.NET Core 2.1提供的C#代码应仅防止编写信息日志。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>();

我仍然看到类似这样的消息:

  

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

  

Microsoft.AspNetCore.Mvc.RazorPages.Internal.PageActionInvoker:信息:   在11.2286ms内执行动作/ Index

我故意(暂时)删除了调用AppSettings.json的代码。为什么我仍会看到信息严重性日志项?

2 个答案:

答案 0 :(得分:1)

尝试在代码中进行以下更改,将第一个AddFilter的类别设置为空

 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以便在首页/索引中进行测试

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

结果的屏幕截图

enter image description here

答案 1 :(得分:1)

对我来说,它使用AddFilter <>()通用方法(我正在使用ASP.Net Core 3.1)。我正在记录Windows事件日志,我只想警告和错误在那里。 因此,我在EventLogLoggerProvider中添加了一个过滤器,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);
        });