Asynchronous Pattern in Windows Communication Foundation
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Published: 13 Jul 2007
In this article Keyvan shows how to implement an asynchronous pattern in Windows Communication Foundation for services and clients to enable easy execution of long running operations.
by Keyvan Nayyeri
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Asynchronous pattern is a very well known and common design pattern in systems that are built on top of executions.  You are probably familiar with some of asynchronous pattern implementations in different aspects of technology.  In software and electronic systems, asynchronous pattern have been widely used.

Like many other technologies, this pattern has an implementation in Windows Communication Foundation which is the topic of this article.

In this article first I will describe an asynchronous pattern in general and how it is supported by Microsoft in .NET Framework then will talk about its definition in WCF.  After giving this basic information, I will talk about details of its configurations as well as its implementation in service and client sides of a WCF application by discovering an example.

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Title: Thanks !   
Name: shibu
Date: 2011-01-18 2:34:06 AM
is there any version
Title: thanks!   
Name: dulcissa
Date: 2010-12-09 3:54:17 PM
thank you! very useful!
Title: Very very useful......   
Name: Devender Yadav
Date: 2010-10-29 11:16:13 PM
Thanks for this articles
Title: Is this joke?   
Name: Jigga
Date: 2010-07-23 1:19:04 PM
Where are You using it asynchronously? Yor client code makes no sense.
Title: Very Helpful   
Name: Ted
Date: 2010-07-07 12:05:06 PM
Very instructive and useful
Title: Where's the Client?   
Name: Adam
Date: 2009-06-02 4:09:23 PM
There is no call in the client side that makes use of the callback routine to discover when the operation is complete. It looks like you did a ton of work to create an asynchronous way to call the Add function, and then the client totally skips it and calls it synchrously. Am I missing something?
Title: Thanx   
Name: MC
Date: 2008-02-21 4:02:44 PM
Very hepful !
Title: Event-Based Asynchronous Programming   
Name: Nirmala
Date: 2007-11-23 7:47:55 AM
Why Event-Based Asynchronous Programming is not supported in WCF proxy? Is there any work around to fill the gap?
Title: InvokeAsync in WCF   
Name: Nirmala
Date: 2007-11-23 7:33:17 AM
In WebService proxy, we have InvokeAsync (of SoapHttpClientProtocol).
But, WCF proxy is missing the InvokeAsync.

Will VS 2008/3.5 support InvokeAsync?
Title: Asynchronous Pattern in WCF   
Name: Nirmala Patthi
Date: 2007-11-19 6:02:17 AM
Hi Keyvan Nayyeri,

Thanks for your article. Do you have any idea how to implement Async2 patten in WCF? In the dotnet WebServices, SoapHttpClientProtocol has InvokeAsync that implements Async2 pattern (that is newly introduced in 2.0 framework).
When we create a WebService proxy, it will have the InvokeAsync implemented by default.
However, when we create a WCF proxy, InvokeAsync is not generated, rather we will have BeginInvoke, EndInvoke though.
I am not sure about if dotnet 3.5 framework, if WCF will come with Async2 pattern.
Can you please comment on this?
Title: Thanks   
Name: Keyvan Nayyeri
Date: 2007-07-13 3:19:21 AM
Thank you Darren :-)
Title: Nice!   
Name: Darren Neimke
Date: 2007-07-13 3:04:25 AM
Nice stuff Keyvan... thanks for sharing :-)

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