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Asynchronous Delegates

Hi!

Is it possible to wait for the callback method to finish? When using a
WaitHandle only the call of EndInvoke is awaited. I would like to do
some calculations in the callback-method. But I don't know how to inform
the main thread that the calculations are done, besides defining an
event. Is it not possible to let the callback method do the work? Or am
I getting something wrong?

THX!
Tobias
Nov 17 '05 #1
1 1231
Tobias,

You should let the callback method do your work. This will be on a
thread other than the main thread that the BeginInvoke was called on.

If you need to notify your main thread (which I assume is your UI
thread), then create a method that will serve as a callback for a delegate
you define. Then, in your callback method, when the calcs are done, call
the Invoke method on the form/control on the UI thread, passing a delegate
that wraps the method to be called.

Hope this helps.
"Tobias Matzat" <to**********@freenet.de> wrote in message
news:43***********************@newsread2.arcor-online.net...
Hi!

Is it possible to wait for the callback method to finish? When using a
WaitHandle only the call of EndInvoke is awaited. I would like to do some
calculations in the callback-method. But I don't know how to inform the
main thread that the calculations are done, besides defining an event. Is
it not possible to let the callback method do the work? Or am I getting
something wrong?

THX!
Tobias

Nov 17 '05 #2

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