Properly stopping a .net windows service

Posted on 2009-07-01
Last Modified: 2013-12-17
How can I stop a windows service from within the code and have the service show as stopped in the WMI?  For example, if I am looking for a config file on startup and don't find it, I just want to stop the service.  I tried the code below, and it does stop executing the code in the DoWork routine (because the event log doesn't get wriitten to anymore), but the service still shows as started in the WMI.
Public Class TestService

    Private _worker As New Worker()

    Protected Overrides Sub OnStart(ByVal args() As String)

        Dim wt As System.Threading.Thread

        Dim ts As System.Threading.ThreadStart

        ts = AddressOf _worker.DoWork

        wt = New System.Threading.Thread(ts)


    End Sub

    Protected Overrides Sub OnStop()


    End Sub

    Public Class Worker

        Private m_thMain As System.Threading.Thread

        Private m_booMustStop As Boolean = False

        Private m_rndGen As New Random(Now.Millisecond)

        Public Sub StopWork()

            m_booMustStop = True

            If Not m_thMain Is Nothing Then

                If Not m_thMain.Join(100) Then


                End If

            End If

        End Sub

        Public Sub DoWork()

            Dim TestCounter As Integer = 0    'we'll stop the the service after we loop through twice

            m_thMain = System.Threading.Thread.CurrentThread

            Dim i As Integer = m_rndGen.Next

            m_thMain.Name = "Thread" & i.ToString

            While Not m_booMustStop

                TestCounter += 1

                System.Diagnostics.EventLog.WriteEntry("EmptyService", "Start work: " & m_thMain.Name)


                System.Diagnostics.EventLog.WriteEntry("EmptyService", "Finish work: " & m_thMain.Name)

                If TestCounter > 1 Then StopWork()

            End While

        End Sub

    End Class

End Class

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Question by:grantdaddy
  • 3
LVL 14

Accepted Solution

shahprabal earned 500 total points
ID: 24757811
You need to use the System.ServiceProcess.ServiceController class :

Author Comment

ID: 24763405
Thanks shahprabal.  I tried the code below and it is kind of working.  The service still shows as Started in the WMI (even if you refresh the list or exit WMI and come back in) but if you try to stop the service through the WMI, you get a windows message box saying they service could not be stopped due to an internal error.  It is like the service really is stopped but WMI does not know it.

Is the code below what you would typically use?
Dim Services() As ServiceController = ServiceController.GetServices

For Each service As ServiceController In Services

   If service.ServiceName = "Test" Then


      Exit For

   End If


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LVL 14

Expert Comment

ID: 24763463
1) Check the value of service.CanStop
This should be true else the service is created such that it can't be stopped.
2) Add this line after service.Stop()
3) Then check the status property value:
LVL 14

Expert Comment

ID: 24763471

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