我需要.NET 3.0辅助服务才能登录到Azure Application Insights和EventLog。这些都不起作用（几乎）！

这是我的CreateHostBuilder：

        public static IHostBuilder CreateHostBuilder(string[] args)
        {
            return Host.CreateDefaultBuilder(args)
                .ConfigureServices((hostContext,services) =>
                {
                    IConfiguration configuration = hostContext.Configuration;

                    WatchdogOptions options = configuration.GetSection("WorkerOptions").Get<WatchdogOptions>();
                    if (options == null) throw new WatchdogException("WorkerOptions settings are not set");

                    services.AddSingleton(options);

                    services.AddHostedService<Worker>()
                    // .AddApplicationInsightsTelemetryWorkerService();
                    ;
                })
                .ConfigureLogging(logging =>
                {
                    logging.ClearProviders();
                    //logging.AddConsole();
                    logging.AddApplicationInsights("<instr-key>");
                    logging.AddEventLog(new EventLogSettings
                    {
                        SourceName = "PNWatchdog",LogName = "Watchdog"
                    });
                });
        }

1）无论我做什么，EventLog都没有来自我的工作人员的任何记录。我确实在应用程序设置中设置了日志记录级别：

{
  "Logging": {
    "LogLevel": {
      "Default": "Debug","System": "Information","microsoft": "Information"
    }
  },"EventLog": {
    "LogLevel": {
      "Default": "Information","microsoft.Hosting.Lifetime": "Information"
    }
  }
}

2）应用洞察力仅在注释.AddApplicationInsightsTelemetryWorkerService() 并且将检测键硬编码在logging.AddApplicationInsights("8d3bc77d-1cc3-4c4a-83e4-6d8aaa87f8f7")中时获得记录。应该怎么做才能从应用程序设置中获取密钥？

3）为什么这么麻烦？

更新

完整的app.development.settings：

{
  "Logging": {
    "LogLevel": {
      "Default": "Debug","microsoft": "Information"
    },"EventLog": {
      "LogLevel": {
        "Default": "Information","microsoft.Hosting.Lifetime": "Information"
      }
    }
  },"ApplicationInsights": {
    "InstrumentationKey": "8d3bc77d-1cc5-what-ever-0000000000"
  }
}

更新2

ApplicationInsights 已添加到记录部分：

{
  "Logging": {
    "LogLevel": {
      "Default": "Debug","microsoft.Hosting.Lifetime": "Information"
      }
    },"ApplicationInsights": {
      "LogLevel": {
        "Default": "Information"
      }
    } 
  },"ApplicationInsights": {
    "InstrumentationKey": "8d3bc77d-1cc5-4c4a-83e4-6d8aaa87f8f7"
  }
}

更新3

Logging:ApplicationInsights:LogLevel的属性名称已更改：

{
  "Logging": {
    "LogLevel": {
      "Default": "Debug","ApplicationInsights": {
      "LogLevel": {
        "PushNotificationsWatchdog.Worker": "Information"
      }
    }
  },"ApplicationInsights": {
    "InstrumentationKey": "8d3bc77d-1cc5-4c4a-83e4-6d8aaa87f8f7"
  }
}

同一件事-App Insights中没有记录。仪表键正确。

解决方案

感谢@ peter-bons！

因此，我更改了ConfigureServices()和ConfigureLogging()的顺序，并使用了UPDATE 2中的appsettings，它现在可以工作了！这样我们就可以了：

public static IHostBuilder CreateHostBuilder(string[] args)
        {
            return Host.CreateDefaultBuilder(args)
                .ConfigureLogging(logging =>
                {
                    logging.ClearProviders();
                    logging.AddConsole();
                    logging.AddEventLog(new EventLogSettings
                    {
                        SourceName = "PNWatchdog",LogName = "Watchdog"
                    });
                })
                .ConfigureServices((hostContext,services) =>
                {
                    services.AddHostedService<Worker>()
                        .AddApplicationInsightsTelemetryWorkerService();
                })
                .UseWindowsService(); // windows only feature
        }