use hangfire as windows service by topshelf (.net core 2.2)

Question

I am trying to use hangfire as windows service by using Topshelf in console app .net core 2.2 . I just want to load hangfire dashboard, not adding any job or anything else.

Program.cs

using System;
using Topshelf;

namespace HangfireAsService
{
 class Program
{
static void Main(string[] args)
{
  HostFactory.Run(config =>
  {
    config.Service<Bootstrap>(service =>
    {
      service.ConstructUsing(s => new Bootstrap());
      service.WhenStarted(s => s.Start());
      service.WhenStopped(s => s.Stop());
    });
    config.RunAsLocalSystem();
    config.SetDescription("Hangfire as windows Service for DataCrawling Project");
    config.SetDisplayName("Hangfire Service Custom");
   });
  }
 }
}

Bootstrap.cs

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Owin.Hosting;

namespace HangfireAsService
{
  public class Bootstrap
{
private IDisposable _host;


public void Start()
{
  var options = new StartOptions { Port = 8999 };
  _host = WebApp.Start<Startup>(options);
  Console.WriteLine();
  Console.WriteLine("Hangfire has started");
  Console.WriteLine("Dashboard is available at http://localhost:8999/hangfire");
  Console.WriteLine();
}

public void Stop()
{
  _host.Dispose();
}
}
}

Startup.cs

using Hangfire;
using Microsoft.AspNetCore.Builder;
using Owin;
using System;
using System.Collections.Generic;
using System.Text;


namespace HangfireAsService
{
 public class Startup
 {
  public void Configuration(IApplicationBuilder appBuilder)
 {
  GlobalConfiguration.Configuration
    .UseSqlServerStorage("Server=111.111.11.1\\INS2017; Database=Hangfire; user=sa; 
    password=;");
  appBuilder.UseHangfireDashboard();
  appBuilder.UseHangfireServer();

  }
 }
} 

As you can see, I created 2 classes for my self-host owin and after reviewing the event viewer I got the error displayed below:

The description for Event ID 0 from source HangfireAsService cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.

If the event originated on another computer, the display information had to be saved with the event.

The following information was included with the event:

Service cannot be started. System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.Owin.Hosting.Utilities.SettingsLoader.FromConfigImplementation..ctor() at Microsoft.Owin.Hosting.Utilities.SettingsLoader.<>c.b__1_0() at System.Threading.LazyInitializer.EnsureInitializedCore[T](T& target, Func1 valueFactory) at Microsoft.Owin.Hosting.Utilities.SettingsLoader.LoadFromConfig(IDictionary2 settings) at Microsoft.Owin.Hosting.Engine.StartContext..ctor(StartOptions options) at Microsoft.Owin.Hosting.Starter.DirectHostingStarter.Start(StartOptions options) at Microsoft.Owin.Hosting.Starter.HostingStarter.Start(StartOptions options) at HangfireAsService.Bootstrap.Start() in C:\MyWorkSpace\Data Crawling\dataCrawlingConsole\HangfireAsService\Bootstrap.cs:line 17
at HangfireAsService.Program.<>c.b__0_3(Bootstrap s) in C:\MyWorkSpace\Data Crawling\dataCrawlingConsole\HangfireAsService\Program.cs:line 15
at Topshelf.ServiceConfiguratorExtensions.<>c__DisplayClass2_01.<WhenStarted>b__0(T service, HostControl control) at Topshelf.Builders.DelegateServiceBuilder1.DelegateServiceHandle.Start(HostControl hostControl) at Topshelf.Runtime.Windows.WindowsServiceHost.OnStart(String[] args)
at System.ServiceProcess.ServiceBase.ServiceQueuedMainCallback(Object state)

The message resource is present, but the message was not found in the message table.

Answer 1

i used same code inside .net framework instead of .net core and work perfectly.after a test something else i notice this problem because of OWIN happened so after i removed it and use using .net core self-host instead of OWIN everything work perfectly. below link will help you a lot.

https://medium.com/@tocalai/create-windows-service-using-net-core-console-application-dc2f278bbe42