ASP.NET Core EventLog provider

Question

I have a project using .NET Framework ASP.NET Core 2.0, and want to implement logging to windows event log, like i read here

Add log providers

public class Program
{
        public static void Main(string[] args)
        {
            BuildWebHost(args).Run();
        }

        public static IWebHost BuildWebHost(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
            .ConfigureLogging((hostingContext, logging) =>
            {
                logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging"));
                logging.AddEventSourceLogger();
                logging.AddConsole();
            })
            .UseStartup<Startup>()
            .Build();
    }

Controller

[Route("api/[controller]")]
public class ShortCodeController : Controller
{
        private readonly ILogger _logger;

        public ShortCodeController(ILogger<ShortCodeController> logger)
        {
            _logger = logger;

            _logger.LogInformation("INIT");
        }

        [HttpGet("{letters}/{digits}/{length}")]
        public string Get(bool letters, bool digits, int length)
        {
            _logger.LogError("TEST");

            return "value";
        }
    }

And it works for console, I see my log messages. But i can't find that messages in event log using event viewer. Why?

Solution 1

logging.AddEventSourceLogger()

is for Event Tracing.

For the Event Log, you want to use:

logging.AddEventLog()

Solution 2

Install Microsoft.Extensions.Logging.EventLog from Nuget.

Include the Microsoft.Extensions.Logging.EventLog on the program.cs file

Then logging.AddEventLog() will be possible and consequently you will be able to achieve your goal

Comments

[JsonStatham]

Its kind of related to this specific question and answer. Anyway, I've ran this from Package Manager Console "Install-Package Microsoft.Extensions.Logging.EventLog -Version 2.0.0" and i can see it now.

[mjwills]

The docs.microsoft.com/en-us/aspnet/core/fundamentals/logging/… link in my answer has a link to the NuGet package needed.

[thepirat000]

For AddEventSourceLogger, install nuget package Microsoft.Extensions.Logging.EventSource.

[mjwills]

@thepirat000 The context of this question is explicitly not wanting AddEventSourceLogger so I am confused why you may have added that comment?

[Derek Foulk]

Updated link for the necessary NuGet package: docs.microsoft.com/en-us/aspnet/core/fundamentals/logging/…

[Will Huang]

I still can't find any log message in EventLog Viewer. Do you know what's the default EventSource name?

[joym8]

link for dotnet core 3.1 docs.microsoft.com/en-us/aspnet/core/fundamentals/logging/…

[joym8]

Does the app running under IIS (unmanaged) need any special permission to add event log entry?

[Admin]

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