I am not able to start the service through command prompt. I got error System.NullRederenceException: Object reference not set to be an instance of an object

[Rajamanickam Thangavel]

Hi 

I heard my sr techie about topshelf windows service. i did the below coding logic, code is compiled and working fine, but not able to start the service in command prompt administrator mode. how to fix this. I tried sample service from http://www.christophdebaene.com/blog/2011/03/16/create-a-net-windows-service-in-5-steps-with-topshelf/ but not able to start from command prompt.

pl let me know where is the problem and appreciate your help. thanks

Program cs:

class Program

    {

        static void Main(string[] args)

        {

            ILog _log = LogManager.GetLogger(typeof(WorkLoadService));

            try

            {

                XmlConfigurator.ConfigureAndWatch(

                new FileInfo(".\\log4net.config"));

                var host = HostFactory.New(x =>

                {

                //x.EnableDashboard();

                x.Service<WorkLoadService>(s =>

                    {

                        s.SetServiceName("WorkLoadService");

                        s.ConstructUsing(name => new WorkLoadService());

                        s.WhenStarted(tc =>

                        {

                            XmlConfigurator.ConfigureAndWatch(

                                new FileInfo(".\\log4net.config"));

                            tc.Start();

                        });

                        s.WhenStopped(tc => tc.Stop());

                    });

                    x.RunAsLocalSystem();

                    x.StartAutomatically();

                    x.SetDescription("WorkLoadService Description");

                    x.SetDisplayName("WorkLoadService");

                    x.SetServiceName("WorkLoadService");

                });

                host.Run();

            }

            catch(Exception ex)

            {

                _log.Error(ex.Message);

                _log.Info(ex.Message);

            }

        }

    }

public class WorkLoadService

    {

        private Timer _timer = null;

        readonly ILog _log = LogManager.GetLogger(typeof(WorkLoadService));

        public WorkLoadService()

        {

            double interval = 10000; //TBD need to take from config file.

            _timer = new Timer(interval);

            _timer.Elapsed += new ElapsedEventHandler(OnTick);

        }

        protected virtual void OnTick(object sender, ElapsedEventArgs e)

        {

            _log.Debug("Tick:" + DateTime.Now.ToLongTimeString());

            //using(Queueing queueing = new Queueing())

            //{

            //    queueing.ProcessStart();

            //}

           

        }

        public void Start()

        {

            _log.Info("WorkLoadService is Started");

            _timer.AutoReset = true;

            _timer.Enabled = true;

            _timer.Start();

        }

        public void Stop()

        {

            _log.Info("WorkLoadService is Stopped");

            _timer.AutoReset = false;

            _timer.Enabled = false;

        }

    }

screen shot

event log:

-

System

- Provider [ Name] .NET Runtime

- EventID 1026 [ Qualifiers] 0

Level 2

Task 0

Keywords 0x80000000000000

- TimeCreated [ SystemTime] 2016-05-15T00:59:36.000000000Z

EventRecordID 221424

Channel Application

Computer Infinite-lp0133

Security

-

EventData

Application: ICS.MDE.Win.WorkLoad.exe Framework Version: v4.0.30319 Description: The process was terminated due to an unhandled exception. Exception Info: System.NullReferenceException at Topshelf.WindowsServiceCode.HostInstaller.Install(System.Collections.IDictionary) at System.Configuration.Install.Installer.Install(System.Collections.IDictionary) at System.Configuration.Install.TransactedInstaller.Install(System.Collections.IDictionary) Exception Info: System.InvalidOperationException at System.Configuration.Install.TransactedInstaller.Install(System.Collections.IDictionary) at Topshelf.Hosts.InstallHost.<Run>b__6(System.Configuration.Install.TransactedInstaller) at Topshelf.Hosts.AbstractInstallerHost.WithInstaller(System.Action`1<System.Configuration.Install.TransactedInstaller>) at Topshelf.Hosts.InstallHost.Run() at ICS.MDE.Win.WorkLoad.Program.Main(System.String[])   - System - Provider [ Name] Application Error - EventID 1000 [ Qualifiers] 0 Level 2 Task 100 Keywords 0x80000000000000 - TimeCreated [ SystemTime] 2016-05-15T00:59:37.000000000Z EventRecordID 221425 Channel Application Computer Infinite-lp0133 Security - EventData ICS.MDE.Win.WorkLoad.exe 1.0.0.0 5737c99b KERNELBASE.dll 6.1.7601.23418 5708a7e4 e0434352 0000c54f 1ac0 01d1ae450895a792 C:\Development\CareNet\SourceCode\Windows Service\WorkLoad\ICS.MDE.Win.WorkLoad\bin\Debug\ICS.MDE.Win.WorkLoad.exe C:\Windows\syswow64\KERNELBASE.dll 4b44d29d-1a38-11e6-82b3-00607349ee54

[Chris Patterson]

You might just review the documentation and make sure you haven't missed anything.

http://docs.topshelf-project.com/en/latest/configuration/quickstart.html

A null reference exception on the installer seems really outside the expected behavior, particularly from the command-line.

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[Rajamanickam Thangavel]

Hi chris

i tried same example TownCrier (no modification), but while start service from command prompt administrator is not started. see the attached screen shot.

[Travis Smith]

So there could be something messed up with you administrator profile. What OS version is this? Can you duplicate it on another machine? Have you installed a Topshelf logging package and examined or attached the logs? What version of .NET and Topshelf are you using?

--

-Travis