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When the web page accesses any profile information, ASP.NET calls the GetPropertyValues() method. It passes in two parameters a SettingsContext object that includes information such as the current user name and a SettingsPropertyCollection object that contains a collection of all the profile properties that the application has defined (and expects to be able to access). You need to return a SettingsPropertyValueCollection with the corresponding values. Before doing anything, you should create a new SettingsPropertyValueCollection: Public Overrides Function GetPropertyValues(ByVal context As SettingsContext, ByVal properties As SettingsPropertyCollection) As SettingsPropertyValueCollection ' This collection will store the retrieved values. Dim values As New SettingsPropertyValueCollection() ... Now create the ADO.NET objects that you need in order to execute the stored procedure that retrieves the profile information. The connection string and stored procedure name are specified through the configuration attributes that were retrieved in the Initialize() method. ... Dim con As New SqlConnection(connectionString) Dim cmd As New SqlCommand(getProcedure, con) cmd.CommandType = CommandType.StoredProcedure ... The only nonconfigurable assumption in this code is that the stored procedure accepts a parameter named @UserName. You could add other configuration attributes to make this parameter name configurable. ... cmd.Parameters.Add(New SqlParameter("@UserName", CStr(Context("UserName")))) ... Now you re ready to execute the command and retrieve the matching record. Depending on the design of the database, this record may actually represent the joining of two tables (one with a list of users and one with profile information), or all the information may come from a single table. ... Try con.Open() Dim reader As SqlDataReader = cmd.ExecuteReader(CommandBehavior.SingleRow) ' Get the first row. reader.Read() ...

Defines many types you use to control how data is serialized and deserialized within the WCF framework. This primary WCF namespace defines binding and hosting types, as well as basic security and transactional types. Defines numerous types that provide programmatic access to WCF configuration files. Defines types that provide an object model to the addresses, bindings, and contracts defined within WCF configuration files. Contains types to integrate with the MSMQ service. Defines numerous types to control aspects of the WCF security layers.

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Once you have the row, the next task is to loop through the SettingsPropertyCollection. For each defined property, you should retrieve the value from the corresponding field. However, it s perfectly valid for a user to exist without any profile information. In this case (when reader.HasRows is False), you should still create the SettingsPropertyValue objects for each requested property, but don t bother setting the property values. They ll simply keep their defaults. ... For Each theproperty As SettingsProperty In properties Dim value New SettingsPropertyValue(theproperty) If reader.HasRows Then value.PropertyValue = reader(theproperty.Name) End If values.Add(value) Next theproperty ... The final step is to close the reader and connection and to return the collection of values. ... reader.Close() Finally con.Close() End Try Return values End Function

In addition to System.ServiceModel.dll and System.Runtime.Serialization.dll, WCF provides a third assembly named System.IdentityModel.dll. This assembly contains many additional namespaces and types that support the CardSpace API. This technology allows you to establish and manage digital identities within a WCF application. Essentially, the CardSpace API provides a unified programming model to account for various security-related details for WCF applications, such as caller identity, user authentication/authorization services, and so on. You will not examine CardSpace further in this edition of the book, so be sure to consult the .NET Framework 4.0 SDK documentation if you want to learn more.

If you want to mimic the behavior of the SqlProfileProvider, you should also update the database with the last activity time whenever the GetPropertyValues() method is called.

As will be explained in more detail later in this chapter, a WCF application is typically represented by three interrelated assemblies, one of which is a *.dll that contains the types that external callers can communicate with (in other words, the WCF service itself). When you wish to build a WCF service, it is perfectly permissible to select a standard Class Library project template (see 14) as a starting point and manually reference the WCF assemblies. Alternatively, you can create a new WCF service by selecting the WCF Service Library project template of Visual Studio 2010 (see Figure 25-2). This project type automatically sets references to the

The job of updating profile properties in the SetPropertyValues() is just as straightforward as reading property values. This time, the update stored procedure is used, and every supplied value is translated into a parameter with the same name. Here s the complete code: Public Overrides Sub SetPropertyValues(ByVal context As SettingsContext, ByVal values As SettingsPropertyValueCollection) ' Prepare the command. Dim con As New SqlConnection(connectionString) Dim cmd As New SqlCommand(updateProcedure, con) cmd.CommandType = CommandType.StoredProcedure ' Add the parameters. ' The assumption is that every property maps exactly ' to a single stored procedure parameter name. For Each value As SettingsPropertyValue In values cmd.Parameters.Add(New SqlParameter(value.Name, value.PropertyValue)) Next ' Again, this provider assumes the stored procedure accepts a parameter named ' @UserName. cmd.Parameters.Add(New SqlParameter("@UserName", CStr(context("UserName")))) ' Execute the command. Try

required WCF assemblies; however, it also generates a good deal of starter code, which you will more likely than not delete.

Next, open the project properties and set the output folder to the new Spring-Hibernate server s /src/main/webapp/flex-client folder, as shown in Figure 10-19. Every time you build the Flex project, all files generated by the Flex compiler will be stored into this directory.

con.Open() cmd.ExecuteNonQuery() Finally con.Close() End Try End Sub This completes the code you need for the simple implementation of the FactoredProfileProvider.

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