How to create datagrid template as resource

Hi,

I have an app that needs to dynamically generate a tabItem with a single datagrid on it. The only difference between the datagrid on each tabItem is the ItemsSource but they are all of the same data type.

I created a ListBox that uses the template if it matches the type. Here is the XML:

<Window.Resources><DataTemplate DataType="{x:Type l:Fruit}"><StackPanel Orientation="Horizontal"><TextBlock FontWeight="Bold" Text="{Binding Name}"/><TextBlock Text=" "/><TextBlock Text="{Binding Description}"/></StackPanel></DataTemplate></Window.Resources>
...<ListBox Name="eventList" HorizontalAlignment="Left" Width="134" />

and the C# just sets the ItemsSource:

  public class Fruit
  {
    public Fruit(String name, String description) { Name = name; Description = description; }
    public String Name { get; set; }
    public String Description { get; set; }
  }
...
    List<Fruit> fruitList = new List<Fruit>() 
    {
      new Fruit("Apple", "Sweet fruit"),
      new Fruit("Pear", "Lekker fruit"),
    };

...
    public MainWindow()
    {
      InitializeComponent();
      eventList.ItemsSource = fruitList;
    }

So the concept of binding by data type I could get working. When I tried this with a DataGrid, the DataGrid binds to the ItemsSource correctly but does not use my template. It simply uses defaults as if the template does not exist. Here is my XML:

<Window.Resources><DataTemplate DataType="{x:Type l:Car}" ><DataGrid AutoGenerateColumns="False" HorizontalScrollBarVisibility="Auto"><DataGrid.Columns><DataGridCheckBoxColumn Header="Valid" Binding="{Binding Path=Valid}" Width="40" IsReadOnly="True"/><DataGridTextColumn Header="Name" Binding="{Binding Path=Name}" Width="80" IsReadOnly="True" FontWeight="Bold"/><DataGridTextColumn Header="Description" Binding="{Binding Path=Description}" Width="100*" IsReadOnly="True"/></DataGrid.Columns></DataGrid></DataTemplate></Window.Resources>
...<Grid><DataGrid Name="xyz"/></Grid>

and the C# just sets the ItemsSource for 'xyz':

  public class Car
  {
    public Car(String name, String description, bool valid) { Name = name; Description = description; Valid = valid; }
    public bool Valid { get; set; }
    public String Name { get; set; }
    public String Description { get; set; }
  }
...
    List<Car> carList = new List<Car>() 
    {
      new Car("Polo", "VW Polo", true),
      new Car("Mazda", "Mazda 5", false),
    };
...
xyz.ItemsSource = carList;

Why does it not use my template?

Thx

Heinrich