WPF ItemsControl Binding to UserControl - wpf

Question

I have a WPF application where I need to do something like that :
<ItemsControl x:Name="lstProducts">
<ItemsControl.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding ProductName}" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
I set the ItemsSource in code like this : lstProducts.ItemsSource = MyEFContext.Products;
Up to now everything is working fine. Now I want to use my own UserControl to display a product instead of the TextBlock like that.
<ItemsControl x:Name="lstProducts">
<ItemsControl.ItemTemplate>
<DataTemplate>
<my:ProductItemCtl ProductName="{Binding ProductName}" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
In my userControl, I created a DependencyProperty like that (see below) where I set the ProductName in the OnProductNameChanged callback.
The TextBlock in my usercontrol is not updated when binding the ItemsControl, and the callback is not launched.
#region ProductName
/// <summary>
/// ProductName Dependency Property
/// </summary>
public static readonly DependencyProperty ProductNameProperty =
DependencyProperty.Register("ProductName", typeof(String), typeof(ProductItemCtl),
new FrameworkPropertyMetadata("",
new PropertyChangedCallback(OnProductNameChanged)));
/// <summary>
/// Gets or sets the ProductName property. This dependency property
/// indicates ....
/// </summary>
public String ProductName
{
get { return (String)GetValue(ProductNameProperty); }
set { SetValue(ProductNameProperty, value); }
}
/// <summary>
/// Handles changes to the ProductName property.
/// </summary>
private static void OnProductNameChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ProductItemCtl target = (ProductItemCtl)d;
String oldProductName = (String)e.OldValue;
String newProductName = target.ProductName;
target.OnProductNameChanged(oldProductName, newProductName);
}
/// <summary>
/// Provides derived classes an opportunity to handle changes to the ProductName property.
/// </summary>
protected virtual void OnProductNameChanged(String oldProductName, String newProductName)
{
// Set Product Name in the display Here!
this.txtProductName.Text = newProductName;
}
#endregion

Answer 1

Not an answer, but i can't write this as comment. What happens if you simplify your code like this:
public static readonly DependencyProperty ProductNameProperty = DependencyProperty.Register(
"ProductName", typeof(string), typeof(ProductItemCtl),
new FrameworkPropertyMetadata(string.Empty,
(o, e) => ((ProductItemCtl)o).txtProductName.Text = (string)e.NewValue));

Answer 2

Arrrghhh got it... I had this.ProductName = ""; in the constructor of my UserControl
I wasted so much time on this... And sorry for wasting all of yours.
Since I found out by trying your code Clemens I will mark your answer as "Answered".
thanks everyone.