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Figure 1-8. Microsoft Visual Studio 2008 2. Silverlight Tools for Visual Studio 2010: This is a package that adds the necessary items to Visual Studio to teach it how to handle Silverlight projects. The package includes a number of items, some of which are listed below:

public void delete(final UserAccount account) { getHibernateTemplate().delete(account); } The two deletion methods are of comparable simplicity. However, if we now take a look at the Hibernate-based account creation logic (see Listing 4-13), we start to see a substantial advantage of Hibernate over JDBC-based logic.

Listing 1-2 shows the SQL to enter one complete row in our Member table. The data items are in the same order as specified when the table was created (Listing 1-1). Note that the date and string values need to be enclosed in single quotes.

In the past, the list box type of control has been considered one of the common controls in programming no more special than a drop-down list. However, in Silverlight, this has all changed. The ListBox is perhaps one of the most flexible controls used to display lists of data. In fact, referring back to ASP.NET controls, the Silverlight ListBox is more a cousin to the DataList control than the ASP.NET ListBox control. Let s take a peek at this powerful control.

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public void create(final UserAccount account) { getHibernateTemplate().persist(account); } Although Listing 4-13 is not very different from Listing 4-12, the corresponding JDBC persist method would be much more complex. Listing 4-14 shows part of a JDBC-based implementation.

Listing 1-2. Inserting a Complete Row into the Member Table INSERT INTO Member VALUES (118, 'McKenzie', 'Melissa', '963270', 30, '05/10/1999', 'F')

If we wire up the ListBox to our Person data from our earlier DataGrid example, you will see that, by default, the ListBox really is just a standard ListBox. <ListBox Margin="10" x:Name="list" DisplayMemberPath="Name" /> One additional property you may have noticed in this ListBox definition is DisplayMemberPath. If you are defining a simple text-based ListBox, the ListBox needs to know which data member to display. Since the Person class contains three properties (Name, Age, and Male), we need to tell it that we want the Name to be displayed. Figure 5-14 shows the results.

public void create(final UserAccount account) { // Make the account entity persistent getTemplate().update(INSERT_ACCOUNT, account.getAccountName()); final Long accountId = getTemplate().queryForLong(SELECT_LAST_ACCOUNT_ID); account.setId(accountId); persistTransientRoles(account); } The Spring Hibernate template successfully reduces several complex operations down to a single line of code: It generates the primary key of the account entity. It ensures that the transient entity is updated with the new primary key. It ensures that associated entities (roles) are saved as necessary. The underlying complexity is hidden in two places. First, Hibernate itself removes the need to create explicit code to convert result sets into entities. The annotations in the entity class contain enough information to allow this to be deduced. If you use the default annotation values where possible (for things such as the table name, the column name, and so forth), as you can when creating a build from scratch, the annotations are extremely

If many of the data items are empty, we can specify which attributes or fields will have values. If we had only the ID and last name of a member, we could insert just those two values as in Listing 1-3. Remember that we always have to provide a value for the primary key field.

However, the ListBox control can contain much more than plain text. In fact, if you define a custom ItemTemplate for the ListBox, you can present the items in a more interesting way. Here s an example using the same Person data: <ListBox Margin="10" x:Name="list"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel Margin="5" Orientation="Vertical"> <TextBlock FontSize="17" FontWeight="Bold" Text="{Binding Name}" /> <StackPanel Margin="5,0,0,0" Orientation="Horizontal"> <TextBlock Text="Age: " /> <TextBlock Text="{Binding Age}" /> <TextBlock Text=", Male: " /> <TextBlock Text="{Binding Male}" /> </StackPanel> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> Figure 5-15 shows how this custom ListBox appears in a browser.

Listing 1-3. Inserting a Row into the Member Table When Only Some Attributes Have Values INSERT INTO Member (MemberID, LastName) VALUES (258, 'Olson')

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