Beginning ASP.NET 4.5 in CSharp and VB Opsylum

Introducing Query Syntax x 515
Order By genre.Name
Select New With {genre.Name, genre.Reviews}
Repeater1.DataSource = allGenres
Repeater1.DataBind()
End Using
End Sub
C#
using PlanetWroxModel;
... // Class definition goes here
protected void Page_Load(object sender, EventArgs e)
{
using (PlanetWroxEntities myEntities = new PlanetWroxEntities())
{
var allGenres = from genre in myEntities.Genres.Include("Reviews")
orderby genre.Name
select new { genre.Name, genre.Reviews };
Repeater1.DataSource = allGenres;
Repeater1.DataBind();
}
}
6. Save the changes to your page and then request it in the browser. You should see a result similar to
that shown in Figure 14-6, where each genre appears as a group header above the lists with reviews.
FIGURE 14-6
How It Works
You have two important things to look at in this exercise. First of all,
there’s the LINQ query that is used to get the genres and reviews from
the database. This query (that uses Include("Reviews") to prevent
lazy loading as you saw earlier) creates a new anonymous type with two
properties: the Name of the Genre as a String and a collection of Review
objects called Reviews. The class diagram for the new anonymous type
could look like Figure 14-7.
FIGURE 14-7