CODEWITHSUNDEEP
c#.net-corewindows-services
Chris Ward
Chris Ward

Reputation: 817

How do I enable Event Logging in a .NET Core WorkerService running as a Window Service

I'm trying to build a .NET Core WorkerService that runs as a Windows Service and is able to log to the Application Event Log.

I'm not getting any errors or anything the service does run using the sc create then sc start but I'm getting nothing in the event application event log as expected.

What have I missed?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.EventLog;

namespace FreshIQPrinterProxy
{
    public class Program
    {
        public static void Main(string[] args)
        {
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
            .UseWindowsService()
            .ConfigureLogging((context, logging) =>
            {
                logging.AddEventLog(new EventLogSettings()
                {
                    SourceName = "MyApp"
                });
            })
            .ConfigureServices((hostContext, services) =>
            {
                services.AddHostedService<Worker>();
            });
    }
}

Here is my Worker.cs file

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.EventLog;

namespace FreshIQPrinterProxy
{
    public class Worker : BackgroundService
    {
        private readonly ILogger<Worker> _logger;

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

        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {
            while (!stoppingToken.IsCancellationRequested)
            {
                _logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
                await Task.Delay(1000, stoppingToken);
            }
        }
    }
}

And here is my appsettings.json file

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "EventLog": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  }
}

Upvotes: 2

Views: 4199

Answers (1)

Stephen Cleary
Stephen Cleary

Reputation: 457302

In your appsettings.json, the EventLog node needs to be underneath the Logging node, e.g.:

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    },
    "EventLog": {
      "LogLevel": {
        "Default": "Information",
        "Microsoft.Hosting.Lifetime": "Information"
      }
    }
  }
}

Upvotes: 10

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