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ColdFusion Authors: Yakov Fain, Jeremy Geelan, Maureen O'Gara, Nancy Y. Nee, Tad Anderson

Related Topics: ColdFusion, Adobe Flex

ColdFusion: Article

ColdFusion MX: A Web Service Example

Verify e-mail addresses at time-of-entry

Displaying the Results
The final step is processing the result set returned from the Web service that will be stored in the aGetXMLValidEmail ColdFusion variable created by the <CFINVOKE> tag. For this example <CFSWITCH> will be used to display, dynamically, a "user friendly" message based on the value of the result set.

<cfswitch expression="#aGetXMLValidEmail#">
<cfcase value="Valid">
E-Mail Provided Is Valid
<cfcase value="InvalidUser">
E-Mail Server is Valid but the User does not exist.
<cfcase value="InvalidServer">
E-Mail Server is not valid, cannot verify E-Mail address
provided. Please re-enter and try again.
<cfcase value="InvalidAddress">
E-Mail provided is not properly formatted. Please re-enter and try again.
<cfcase value="Error">
An error was encountered with the web service verification.
Please try again later.

Using the returned result set, a custom message can be displayed to the user (see Image V).

Sometime near the start of the Internet the term "Information Highway" was coined. Except for a very few, most drivers on this "Information Highway" got lost or missed a lot of the wondrous sights. The biggest problem, in my opinion, was that there were not enough road signs to indicate what services were available at the millions of off-ramps.

My sixth grade teacher, my mentor even now that she has been gone for many years, once told me, "The smartest person in the world is not the one who knows the most, but the one who knows where to find the most." She told me this the day she took me to the school library, gave me my first library card, and showed me how to use the card catalog to locate a book.

With this article you now have a road sign that spells out some of the services that are available on the off-ramp called Web services. Take the exit, explore the countryside, and enjoy the wonders and advantages that this article barely touches on.

A special thanks to Josh Einstein of Einstein Technologies for allowing the use of their Web service for the examples in this article.

Listings and information on hundreds of Web services can be found at the following URLs:

More Stories By Richard Gorremans

For the past four yers, Richard Gorremans has been working for EDFUND, the nonprofit side of the Student aid Commission, located in Rancho Cordova, California. A senior software engineer with over 13 years in the business, he has been working as a technical lead producing Web-based products tht enable borrowers, lenders, and schools to view and maintain student loan information via the Web.

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