vb.net - Killing a thread completely in Multithreaded application -


i new vb bare me please....

can show/tell me i'm steering wrong this? running second thread in application read values registers in motion controller , updates values appropriate fields on ui every 100ms. when disconnect controller (ie...ethernet cable disconnected, lost comms), want destroy/terminate thread (thread1) completely. when reconnect ethernet cable, click button on ui reestablish comms controller, , execute runthread() sub. when want recreate thread , start it. however, when debugging part of code, appears thread (thread1) never destroyed though have verified code line (case 1) , execute it. after comms re-established, code goes right case 3 , starts thread1, expect jump case 2 , recreate thread. 

public class frmmain     private rmc rmclink     public thread1 system.threading.thread = new system.threading.thread(addressof readregisters)     private sub runthread()         dim conditions integer         if rmc.isconnected(pingtype.ping) = false , thread1 isnot nothing             conditions = 1         elseif rmc.isconnected(pingtype.ping) = true , thread1 nothing             conditions = 2         elseif rmc.isconnected(pingtype.ping) = true , thread1 isnot nothing             conditions = 3         end if          select case conditions             case 1                 thread.sleep(100)                 thread1.abort()             case 2                 dim thread1 system.threading.thread = new system.threading.thread(addressof readregisters)                 thread1.start()             case 3                 thread1.start()         end select     end sub

the documentation (https://msdn.microsoft.com/en-us/library/system.threading.thread.abort(v=vs.110).aspx) states terminates thread, you've found doesn't happen.

one way accomplish (i'm sure there others), create public pleasedie property thread's subroutine(s) check periodically, , if property set true, exit subroutines within thread. before thread started, you'll of course have reset pleasedie false.


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