December 2008
Intermediate to advanced
368 pages
11h 2m
English
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Creating an ASMX Web Service
Generally, developers will either communicate with an existing web service or create a web service for their own purposes. This chapter will demonstrate a few variations of web services and how you can communicate with them from Silverlight 2 clients. First, we’ll examine what you need in order to create an ASMX web service and communicate with it from a Silverlight 2 client application.
The example Silverlight 2 application we’ll create will allow a
user to send an email message. Because the Silverlight client does not
have access to the System.Net.Mail
namespace, it must communicate with a server that allows it to send
email messages. Otherwise, the
client could invoke the default mail application and use it to send a
message. However, a server-based solution is often more advantageous, as
it allows for far more customization.
The Silverlight 2 application shown in Figure 5-2 simply allows the user to enter the basic information for sending an email message. When the user enters the information for the email message and clicks the Send via ASMX button, the Silverlight application creates a proxy to the ASMX web service, adds an event handler to handle the return of the ASMX web service call, and invokes the web service asynchronously. The web service is passed the information from the Silverlight client application, which the service then uses to send the email to the recipient(s).
Figure 5-2. Silverlight email client
Getting Started with the Example
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.