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Note that the original service definition that returned fault details in exception messages has been commented out (as has its associated behavior definition in serviceBehaviors), and replaced by a new service definition tag that defines the behavior configuration as being available in the MyServiceTypeBehaviors section. In this section, ServiceMetadata has its httpGetEnabled property set to true, enabling the metadata for the service to be displayed in the service harness. If you change it as specified, then you ll get the full service harness, as in Figure 7-5.

The XmlReader class is an abstract class and provides several properties and methods that you need to override when you inherit from it. Listing A-1 shows signatures of these properties and methods. Listing A-1. Properties and Methods of the XmlReader Class public public { get; } public public { get; } public { get; } public public public public { get; } public { get; } public { get; } public public public public public public public { get; } abstract int AttributeCount; abstract string BaseURI

To close the connection to the page and discard held resources, we use this code:

If you ve built ASMX web services, you ll probably be familiar with the ability to test them with a simple form that is generated for you by the application. Unfortunately, your WCF service doesn t offer the same functionality, so you have to use the svcutil.exe tool to generate a client. This screen demonstrates how you can do this. The svcutil.exe tool creates a proxy class that can be used to talk to the service, as well as the desired configuration information that enables the WCF pipelines to communicate with it. So, if you had for example enabled security or transactability on your service, the client will be configured to use the same features automatically. This is best demonstrated by example, so in the next section, you ll look at how to use these attributes to build a real-life service. This will extend the examples in the previous chapters using the address data from the AdventureWorks database.

reader.close(); connection.disconnect(); connection = null;

Figure 2-5. Using the GetElementByID() method Before you proceed with the application development, you must modify the Employees.xml file as shown in Listing 2-6. Listing 2-6. XML File with DTD < xml version="1.0" encoding="utf-8" standalone="yes" > <!-- This is list of employees --> <!DOCTYPE employees [ <!ELEMENT employees ANY> <!ELEMENT employee ANY> <!ELEMENT firstname ANY> <!ELEMENT lastname ANY> <!ELEMENT homephone ANY> <!ELEMENT notes ANY> <!ATTLIST employee employeeid ID #REQUIRED> ]> <employees> <employee employeeid="1"> <firstname>Nancy</firstname> <lastname>Davolio</lastname> <homephone>(206) 555-9857</homephone> <notes> <![CDATA[includes a BA in psychology from Colorado State University in 1970. She also completed "The Art of the Cold Call." Nancy is a member of Toastmasters International.]]> </notes> </employee> <employee employeeid="2"> <firstname>Andrew</firstname> <lastname>Fuller</lastname>

The next step is to process the page. This code assumes that the page is small enough to manage in memory:

In this section, you ll look at what it takes to create an address service similar to that in earlier chapters. However, as this is a WCF service, you ll be able to take it to the next level with some simple configuration changes for example, adding reliability, security, and transactable characteristics to it. First, create the service using the WCF Service template in the File New dialog. Next, add a new DataSet to it. The DataSet should be based on the following SQL, which makes a parameterized query against the database, filtering the addresses by the ZIP code associated with it. Here s the SQL: