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From: Rahul4ever1
Message 7 in Discussion
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Question Of The Day !!!! -- (23-06-2005)
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From:
Rahul4ever1
New Message on MumbaiUserGroup
Question Of The Day !!!! -- (23-06-2005)
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Message 2 in Discussion
From:
Rahul4ever1
An asynchronous call starts the call to the Web service on a
separate thread, allowing program execution to continue while the Web service
processes the request. For every method found on a Web service, there are two
additional methods for use asynchronously. The names of these methods are the
name of the Web method prefixed with Begin and End. Thus, if a Web service
exposes a method named MyMethod, the asynchronous methods for MyMethod are
BeginMyMethod and EndMyMethod.
You begin an asynchronous method call with the Begin method. In addition to
requiring the same parameters as a synchronous method call, a Begin method call
requires an AsyncCallback delegate that specifies the method for the Web method
to call back on and an object that allows applications to specify custom state
information.
Every Begin method has a return type of IAsyncResult. This interface is used by
the corresponding End method to retrieve the data returned by the asynchronous
call. The callback method specified by the AsyncCallback delegate must have a
signature that takes an IAsyncResult as a parameter. In the callback method,
you can call the End method to retrieve the data.
Thanks,
Dhrumit.
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