Chapter 30. Investigating Web Service Consumers


ASP.NET Developer's JumpStart
By Paul D. Sheriff, Ken Getz
Table of Contents
Part IV.  Web Services


  • Compare synchronous and asynchronous calls to Web Service methods

  • Learn to create the required procedure for callbacks in order to call a Web Service asynchronously

When you create a client application that consumes a method from a Web Service, most likely your application simply calls a method in the object provided by the Web Service or so it would seem. Your code doesn't actually call a method in some remote object that wouldn't make any sense. Under the covers, your code is calling a method in a local object that knows how to contact the remote Web Service and execute the method using SOAP. This local object then retrieves a return value from the remote Web Service method and returns that value back to you.

In this chapter, you'll first create an XML Web Service consumer that calls the method of the Web Service synchronously, much as you might have done previously. Then, you'll learn how to call a Web Service method asynchronously. This allows your application to return immediately after calling the method and await the results while accomplishing other tasks.


    ASP. NET Developer's JumpStart
    ASP.NET Developers JumpStart
    ISBN: 0672323575
    EAN: 2147483647
    Year: 2002
    Pages: 234 © 2008-2017.
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