Question

I created a UserControl in WPF. This user control has several text boxes that are bound to properties on a database object which is referenced by proptery on the UserControl. The xaml looks like:

<TextBox Name='_txtFirstName' Text='{Binding Path=Contact.FirstName, UpdateSourceTrigger=PropertyChanged}'/> 

This worked properly until I made the Contact property into a dependency property so that I could bind it to the selected item in a ListBox. Once I did this the binding of the TextBoxes stopped working. Why is this?

The DependencyProperty code was:

public static readonly DependencyProperty ContactProperty = DependencyProperty.Register( 'Contact', typeof(Contacts), typeof(ContactView)); 

Answer 1

I figured out the problem. I forgot to change this code:

    public Contacts Contact     {         get { return _contact; }         set { _contact = value; }     } 

To this:

    public Contacts Contact     {         get { return (Contacts)GetValue(ContactProperty); }         set { SetValue(ContactProperty, value); }     } 

Now it works properly.