Stopping a running process (vb2005) while updating a progress bar

[Vivek Narayanan]

I'm writing an app in which a process(the vb .net component) is executed and a progressbar is updated simultaneously thru a do .. while loop . What i want to do is to add a cancel/stop button. In the stop button event code ,i've written code to 'kill' the running process . But when i execute the form ,the stop button (or for that matter any button) is not clickable,when the process and the do-while-loop code are running .Please Advice. Regards, Vivek

[Vasudevan Deepak Kumar]

You have a child thread to spawn. I would suggest instead of playing direct with threads, you can try using the SmartThreadPool component: http://www.codeproject.com/csharp/SmartThreadPool.asp[^]

Vasudevan Deepak Kumar Personal Homepage Tech Gossips

[Vivek Narayanan]

the control works only for c#,it doesn't work in vb,can u give me example code for creating threads.

[GuyThiebaut]

I have come across the same situation you describe and using threads I coded it something like this:

Public scanInformThread As Threading.Thread


scanInformThread = New Threading.Thread(AddressOf Me.scanInformThreadProc)
scanInformThread.Priority = Threading.ThreadPriority.Lowest
scanInformThread.Start()

While scanInformThread.IsAlive = True

	check if cancel button is pressed
        if it is pressed then scanInformThreadProc.Abort()
	Yadayada Blahblah
	make a cuppa coffee


End While

Sub scanInformThreadProc()

	Yadayada Blahblah
	do something useful like surf the web

end sub

Please excuse the pseudocode. Also note that this is not thread safe so you will need to put: Control.CheckForIllegalCrossThreadCalls = False at the beginning of your code to stop the compiler from whining at you. I hope this helps. Guy:) -- modified at 8:02 Wednesday 15th August, 2007 -- modified at 8:06 Wednesday 15th August, 2007

You always pass failure on the way to success.

[MartyK2007]

hey you dont need to do the loop . just start the thread and end the function then on the buttons onclick event do a scanInformThreadProc.Abort() HTH Martin

life is a bowl of cherries go on take a byte

[GuyThiebaut]

You're right. I just hacked this out of my memory. Regards Guy

You always pass failure on the way to success.

[Vivek Narayanan]

thanks , i will try this:-D