Re: Questions about Asynchronous Use of Webservice

From: Vitaly Filimonov [MSFT] (vitalyf_at_online.microsoft.com)
Date: 04/30/04

  • Next message: Al Bahr: "Re: Changing Web Reference URL to Dynamic URL But I get Invalid Property Value" 
    Date: Fri, 30 Apr 2004 13:40:13 -0700

    To answer your questions:

    1) Nothing bad will happen. Http response will be sent from the server, but
    won't be processed on the client app;
    2) You cannot serialize IAsyncResult since it is interface, not something
    "serializable". Remember - web services are basically http calls and the way
    web works is the way web services operate... So, if your reply came in while
    you were offline for any reason - you want see the reply at all. 

    -- 
Vitaly.
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"msnews.microsoft.com" <jon at andersoncentral dot com> wrote in message
news:OHbuMPXLEHA.3348@TK2MSFTNGP09.phx.gbl...
> I am working on a winform application that will require calls to
> webservices.  Some of these operations will take some time.  I am thinking
> about calling the asynchronous versions created automatically by dotnet
when
> I set my web reference (ie  BeginXXX and EndXXX).
>
> I have some questions about this though.
>
> 1. What happens if I never call EndXXX?  Let's say my operation (XXX)
> performs updates to a database and then returns status.  Does the database
> operation commit and I just never get the return status data?  Or does the
> lack of an EndXXX call lead to an eventual exception which causes my
> database changes to rollback?  If it doesn't eventually throw an exception
> but I never call EndXXX will there be server resources consumed (and
> theoretically never released)?
> 2. What if my application is shutdown after calling BeginXXX but before
> calling EndXXX? Can I serialize the IAsyncResult object returned from
> BeginXXX when closing the app then deserialize it next time the app opens
> and make the call to EndXXX?
>
> Any help or insights appreciated.
> Thanks, Jon
>
>
  • Next message: Al Bahr: "Re: Changing Web Reference URL to Dynamic URL But I get Invalid Property Value"

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