die thread die!

[svb70]

Hello,
i have a problem with thread.abort. i am using it instead of autoreset event because I have minimal cleanup and when it works it is a lot quicker. I have included the core bits that I am using. btnStartExecution creates the background thread and btnStopExecution is supposed to stop it. what i am trying to do is force a ThreadAbortException and then allow join to do the rest. Unfortunately I can't seem to get Thread.Abort to throw an exception and this is what I need help with. The problem is in the code below in abortThread method. I am cleaning up manually using a custom event run.Stopped, but still need the thread to die before carrying on. Any help appreciated.

Private Delegate Sub _StopExecution_delegate()
Private Delegate Sub _abortThread_delegate()
    
Private Sub btnStartExecution_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStartExecution.Click
   '//m_thread is global thread
   m_Thread = New Thread(AddressOf StartExecution)

   With m_Thread
      .IsBackground = True
      .Start()
   End With
End Sub

Private Sub btnStopExecution_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStopExecution.Click
    frmTreeViewInstance.Invoke(New _StopExecution_delegate(AddressOf StopExecution))
End Sub

Public Sub StopExecution()
   Dim strMessage As String = "Halting execution..."
   report.Write("StopExecution", strMessage, report.Warning, 1) '//custom reporting function
   run.RunStatus = run.Stopped '//handles minimal cleanup required.
 
   Dim del As _abortThread_delegate = New _abortThread_delegate(AddressOf abortThread)
   del.Invoke()
End Sub

Private Sub abortThread()
   Try
      If m_Thread.IsAlive Then
         m_Thread.Abort()
      End If

   Catch
		  '//no ThreadAbortException ever caught?!?
   Finally
      Do Until m_Thread.Join(500) 
         Application.DoEvents()
      Loop

      Dim del As RunStateDelegate = New RunStateDelegate(AddressOf SetRunStateStopped)
      del.Invoke()
   End Try
End Sub

[sparrow1]

Hi,

Here's a link about the Thread Abort method and the ThreadAbortException:

http://msdn.microsoft.com/en-us/libr...64(VS.71).aspx

It could help you,

sparrow1

[Jenner]

Aborting threads in general can be bad. While it's more work, I find that putting loop-breakers in my thread routine works best to kill them gracefully with minimal problems. Then, all you need is a Thread.Join()