BeginInvoke and EndInvoke - Is EndInvoke necessary?

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Robert Conde - 19 Jul 2004 16:38 GMT

Hi,
I'm calling my ui from a thread which is different from the ui thread.
Accordingly I need to use the BeginInvoke or Invoke functions. Now I'd
rather the calls be non-blocking so I'd like to use BeginInvoke. But the
documentation says "CAUTION Always call EndInvoke after your asynchronous
call completes." Is this really necessary? I don't need a result. I just
want to use it like PostMessage. It's gonna be a pain to hold the asynch
result and call EndInvoke somehow. It seems to be working without calling
EndInvoke, but I don't want it creeping up on me later.

Rob Conde
a.i. solutions

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Herfried K. Wagner [MVP] - 19 Jul 2004 17:38 GMT

* "Robert Conde" <conde@ai-solutions.com> scripsit:

> I'm calling my ui from a thread which is different from the ui thread.
> Accordingly I need to use the BeginInvoke or Invoke functions. Now I'd
[quoted text clipped - 4 lines]
> result and call EndInvoke somehow. It seems to be working without calling
> EndInvoke, but I don't want it creeping up on me later.

Currently, you don't need to call 'EndInvoke', but maybe there will be
problems/leaks if you don't call it in future versions of .NET.

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Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>
<URL:http://dotnet.mvps.org/dotnet/faqs/

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Jon Skeet [C# MVP] - 19 Jul 2004 17:58 GMT

> * "Robert Conde" <conde@ai-solutions.com> scripsit:
> > I'm calling my ui from a thread which is different from the ui thread.
[quoted text clipped - 8 lines]
> Currently, you don't need to call 'EndInvoke', but maybe there will be
> problems/leaks if you don't call it in future versions of .NET.

Not for UI calls - I believe the WinForms team has basically guaranteed
that EndInvoke isn't required for UI calls. For all other async
Begin/EndXXX pairs, you should call EndXXX.

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Jon Skeet - <skeet@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

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BeginInvoke and EndInvoke - Is EndInvoke necessary?

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