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As soon as you have configured the roles service, you can create users and roles and then assign users to these roles using either the WAT or the Roles class in your code. On the Security tab, just click the Create or Manage Roles link. Then you can create roles and add users to roles, as shown in Figure 23-4. After you have configured users and roles, you need to configure the authorization rules for your application. You have already learned all the necessary details. Just configure the appropriate <authorization> sections in the different directories of your application. Fortunately, you even don t have to do this manually. When selecting the Security tab, you just need to click one of the links in the Access Rules section, as shown in Figure 23-5.

The final part of the EF puzzle is the ObjectContext class, which is a member of the System.Data.Objects namespace. When you generate your *.edmx file, you get the entity classes that map to the database tables and a class that extends ObjectContext. You typically use this class to interact with object services and entity client functionality indirectly. ObjectContext provides a number of core services to child classes, including the ability to save all changes (which results in a database update), tweak the connection string, delete objects, call stored procedures, and handle other fundamental details. Table 23-1 describes some of the core members of the ObjectContext class (be aware that a majority of these members stay in memory until you call SaveChanges()).

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<property name="locations"> <list> <value>classpath:jdbc.properties</value> </list> </property> </bean> <bean id="dataSource" class="org.springframework.jdbc.datasource .DriverManagerDataSource"> <property name="driverClassName" value="${jdbc.driverClassName}"/> <property name="url" value="${jdbc.url}"/> <property name="username" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> </bean> <bean name="userDao" class="com.apress.flexjava.usermanager .dao.jdbc.UserDaoSpringJdbcImpl"> <property name="dataSource" ref="dataSource" /> </bean> <!-- Hibernate SessionFactory --> <bean id="sessionFactory" class="org.springframework.orm.hibernate3 .annotation.AnnotationSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="configLocation" value="classpath:hibernate.cfg.xml"/> <property name="hibernateProperties"> <value> hibernate.dialect=${hibernate.dialect} hibernate.query.substitutions=true 'Y', false 'N' hibernate.cache.use_second_level_cache=true hibernate.cache.provider_class=org.hibernate.cache.EhCacheProvider hibernate.hbm2ddl.auto=update hibernate.use_sql_comments=true hibernate.show_sql=true </value> </property>

AcceptAllChanges()

When the roles service is enabled, the RoleManagerModule automatically creates a RolePrincipal instance containing both the authenticated user s identity and the roles of the user. The RolePrincipal is just a custom implementation of IPrincipal, which is the base interface for all principal classes. It

Accepts all changes made to entity objects within the object context. Adds an object to the object context. Marks an object for deletion. Executes a stored procedure in the database. Allows you to send a SQL command to the data store directly. Locates an object within the object context by its key. Sends all updates to the data store. This property gets or sets the timeout value in seconds for all object context operations. This property returns the connection string used by the current object context. This event fires when the object context saves changes to the data store.

therefore supports the default functionality, such as access to the authenticated identity and a method for verifying a role membership condition through the IsInRole() method. Furthermore, it employs a couple of additional properties for accessing more detailed information about the principal. You can use the properties in the following code for extracting information from the instance as well as for performing authorization checks by calling the IsInRole() method: Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) If User.Identity.IsAuthenticated Then Dim rp As RolePrincipal = CType(User, RolePrincipal) Dim RoleInfo As New StringBuilder() RoleInfo.AppendFormat("<h2>Welcome {0}</h2>", rp.Identity.Name) RoleInfo.AppendFormat("<b>Provider:</b> {0}<br/>", rp.ProviderName) RoleInfo.AppendFormat("<b>Version:</b> {0}<br/>", rp.Version) RoleInfo.AppendFormat("<b>Expires at:</b> {0}<br/>", rp.ExpireDate) RoleInfo.Append("<b>Roles:</b> ") Dim roles As String() = rp.GetRoles() Dim i As Integer = 0 Do While i < roles.Length If i > 0 Then RoleInfo.Append(", ") End If RoleInfo.Append(roles(i)) i += 1 Loop LabelRoleInformation.Text = RoleInfo.ToString() End If End Sub

AddObject() DeleteObject() ExecuteFunction<T>() ExecuteStoreCommand()

In the previous chapter, you learned details about the security controls that ship with ASP .NET. One of these controls is the LoginView control. You used this control in 21 for displaying different controls for anonymous and logged-in users. The control uses templates for implementing this functionality. In 21 you used the <LoggedInTemplate> and <AnonymousTemplate> templates. The control supports one additional template that enables you to create different views based on the roles to which a user belongs. For this purpose you need to add a RoleGroups template with <asp:RoleGroup> controls. Within every <asp:RoleGroup> control, you specify a comma-separated list of roles in the Roles attribute for which its <ContentTemplate> will be displayed, as follows: <asp:LoginView runat="server" ID="MainView"> <LoggedInTemplate> <h2>This is the logged in template</h2> </LoggedInTemplate> <RoleGroups> <asp:RoleGroup Roles="Admin"> <ContentTemplate> <h2>Only Admins will see this</h2> </ContentTemplate> </asp:RoleGroup> <asp:RoleGroup Roles="Contributor"> <ContentTemplate> <h2>This is for contributors!</h2> </ContentTemplate>

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