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Having problem with InstanceContextMode.PerSession & ConcurrencyMode.Multiple when hosting WCF by winform

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Hi all,

I developed an WCF, set InstanceContextMode.PerSession & ConcurrencyMode.Multiple. I used a winform to start and stop WCF service. However, when i created 5 concurrency users to call WCF, it created 5 instances to process the client calls. But when i investigate my log file i saw that all 5 instances use the same thread and process calls sequence. I expected that there should be an interlanced but not.

Then i tried to using the console app to hosting the WCF, 5 instances use different threads to handle client's calls and i saw the interlance as well.

Could someone tell me why this happen? I cant explain why the win form hosting working like that? Is there anything behind its scene?

Thanks.

Smile
- Moved by nobugz Wednesday, June 18, 2008 7:06 PM Post to old site
Wednesday, June 18, 2008 11:32 AM

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Hi Huong,

This is probably related to the use of a synchronization context. Check out the documentation for the
UseSynchronizationContext property of the ServiceBehaviorAttribute.

Good luck,

--larsw

PS: It is more relevant to ask this question in the Windows Communication Foundation ("Indigo") group at the old forum site.
Good luck, --larsw
- Marked as answer by huong nguyen Thursday, June 19, 2008 10:33 AM
Wednesday, June 18, 2008 6:34 PM

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Hi Huong,

This is probably related to the use of a synchronization context. Check out the documentation for the
UseSynchronizationContext property of the ServiceBehaviorAttribute.

Good luck,

--larsw

PS: It is more relevant to ask this question in the Windows Communication Foundation ("Indigo") group at the old forum site.
Good luck, --larsw
- Marked as answer by huong nguyen Thursday, June 19, 2008 10:33 AM
Wednesday, June 18, 2008 6:34 PM
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Hi Lars,

Thank you so much for your great help. After correct the UseSynchronizationContext property, win form host work as expected.

Thanks again!
Huong Nguyen

P/S: This is my first time to post question so next time i will find more relevant place :). Anyway, i had my answer :P

Smile

Thursday, June 19, 2008 10:44 AM