Threads and winform

[Sunny]

Hi,
If I have (hmm, at least I want to have :) ) a winform, displaying the
progress of a long duration method, which is running in a separate
thread, how do I implement canceling the thread, if I click a button on
the form.
Any directions, examples, etc.

Thanks
Sunny

[100]

Re: Threads and winform

Hi Sunny,

I would suggest using ManualResetEven t object as a flag for canceling the
worker thread.
When you want to cancel the worker thread you can set the event
(event.Set()) then the worker thread has to periodically check the state of
the event

if(event.WaitOn e(0,false))
{
//stop the work and exit
}

When the thread starts it should reset the event (event.Reset())

HTH
B\rgds
100


"Sunny" <sunnyask@icebe rgwireless.com> wrote in message
news:O133eFIpDH A.1960@TK2MSFTN GP12.phx.gbl...[color=blue]
> Hi,
> If I have (hmm, at least I want to have :) ) a winform, displaying the
> progress of a long duration method, which is running in a separate
> thread, how do I implement canceling the thread, if I click a button on
> the form.
> Any directions, examples, etc.
>
> Thanks
> Sunny[/color]

[Sunny]

Re: Threads and winform

Hi 100,
I have thought about such a thing, but I needed some working example.
And the things are a little bit more complicated, 'because I forgot to
mention, that actually this thread is invoking a remoting method, which
takes a long time to execute ...

But, if I see some good example for a non remoting program, I most
probably will figure out hot to marshal the events, etc.

Thanks
Sunny

In article <u0Vd8GJpDHA.36 88@TK2MSFTNGP11 .phx.gbl>, 100@100.com says...[color=blue]
> Hi Sunny,
>
> I would suggest using ManualResetEven t object as a flag for canceling the
> worker thread.
> When you want to cancel the worker thread you can set the event
> (event.Set()) then the worker thread has to periodically check the state of
> the event
>
> if(event.WaitOn e(0,false))
> {
> //stop the work and exit
> }
>
> When the thread starts it should reset the event (event.Reset())
>
> HTH
> B\rgds
> 100
>[/color]

[Jeffrey Tan[MSFT]]

Re: Threads and winform


Hi Sunny,

I think 100 has already provided you a clear way.
You only need follow his way to write a sample:

static AutoResetEvent myResetEvent = new AutoResetEvent( false);
private void button2_Click(o bject sender, System.EventArg s e)
{
myResetEvent.Se t();
}

private void button1_Click(o bject sender, System.EventArg s e)
{
Thread t=new Thread(new ThreadStart(lon gwork));
t.Start();
}

void longwork()
{
while(true)
{
if(myResetEvent .WaitOne(0,fals e))
{
Console.WriteLi ne("quit");
return;
}
Console.WriteLi ne("running!") ;
}
}

In project setting, change the project running as console application, then
you can see the console output of this application.

Hope this helps,

Best regards,
Jeffrey Tan
Microsoft Online Partner Support
Get Secure! - www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.

--------------------
| From: Sunny <sunnyask@icebe rgwireless.com>
| Subject: Re: Threads and winform
| Date: Thu, 6 Nov 2003 14:11:38 -0600
| References: <O133eFIpDHA.19 60@TK2MSFTNGP12 .phx.gbl>
<u0Vd8GJpDHA.36 88@TK2MSFTNGP11 .phx.gbl>
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|
| Hi 100,
| I have thought about such a thing, but I needed some working example.
| And the things are a little bit more complicated, 'because I forgot to
| mention, that actually this thread is invoking a remoting method, which
| takes a long time to execute ...
|
| But, if I see some good example for a non remoting program, I most
| probably will figure out hot to marshal the events, etc.
|
| Thanks
| Sunny
|
| In article <u0Vd8GJpDHA.36 88@TK2MSFTNGP11 .phx.gbl>, 100@100.com says...
| > Hi Sunny,
| >
| > I would suggest using ManualResetEven t object as a flag for canceling
the
| > worker thread.
| > When you want to cancel the worker thread you can set the event
| > (event.Set()) then the worker thread has to periodically check the
state of
| > the event
| >
| > if(event.WaitOn e(0,false))
| > {
| > //stop the work and exit
| > }
| >
| > When the thread starts it should reset the event (event.Reset())
| >
| > HTH
| > B\rgds
| > 100
| >
|

[Miha Markic]

Re: Threads and winform

You might use Thread.Abort method and catch ThreadAbortExce ption within
thread.

Miha

"Sunny" <sunnyask@icebe rgwireless.com> wrote in message
news:O133eFIpDH A.1960@TK2MSFTN GP12.phx.gbl...[color=blue]
> Hi,
> If I have (hmm, at least I want to have :) ) a winform, displaying the
> progress of a long duration method, which is running in a separate
> thread, how do I implement canceling the thread, if I click a button on
> the form.
> Any directions, examples, etc.
>
> Thanks
> Sunny[/color]

[Sunny]

Re: Threads and winform

Thank you all for the posts

Sunny