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What is the best way to update UI from different thread?

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Julia

Hi,

I have an application which run 3 different thread.
the main application display a window like a console window
in VS.NET.
I would like that each thread will write to this window details about it's
progress and status.
I wonder what to choose

1.BeginInvoke.
2.Invoke-will halt the calling thread isn't it?
3.Writing to a thread safe queue,use another thread to read from the queue
and output it in the main thread

Thanks.

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Richard Blewett [DevelopMentor] (VIP)

Prefer Control.BeginInvoke every time.

Using Invoke it?s not that hard to end up in a thread deadlock. And why would the calling thread want to wait around for the UI update to occur?

And as for a queue - well that?s what BeginInvoke is doing - only via the Windows message queue rather than a CLR based one.

Regards

Richard Blewett - DevelopMentor
http://staff.develop.com/richardb/weblog

nntp://news.microsoft.com/microsoft.public.dotnet.languages.csharp/

Hi,

I have an application which run 3 different thread.
the main application display a window like a console window in VS.NET.
I would like that each thread will write to this window details about it's progress and status.
I wonder what to choose

1.BeginInvoke.
2.Invoke-will halt the calling thread isn't it?
3.Writing to a thread safe queue,use another thread to read from the queue and output it in the main thread

Thanks.

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Jon Skeet [C# MVP] (VIP)

Richard Blewett [DevelopMentor] <Click here to reveal e-mail address> wrote:
[Original message clipped]

Only if you don't follow the rule of "don't call Invoke while holding a
lock". It's not hard to make sure you don't deadlock, in my experience.

[Original message clipped]

That's a much better reason to use BeginInvoke, of course.

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

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