Can we update a source that is not DepencyProperty or not INotifyPropertyChanged compliant

Question

I have a business object that comes from the core of the application. That object does not inherit from INotifyPropertyChanged. It contains some property that my XAML code bind to it. I only want to update the properties not the UI dynamically (OneWayToSource style).

By example, if I change the text of a text box, the source item does not get updated. It is a limitation of silverlight that if the object does not implement INotifyPropertyChanged or use DepencyProperties that the source of the binding cannot be updated?

Answer 1

If your business object has a set method on the property you want to update, then the value should be updated, provided the value you enter doesn't trigger an exception.

Not implementing INotifyPropertyChanged hinders just visual feedback.

Answer 2

The source property does not need to be a dependency property nor does the class that exposes it need to implement INotifyPropertyChanged.

If you have the binding on the TextBox set to use the TwoWay mode editing the text box should update the bound property even if it is a plain "vanila" property. Note by default the focus has to leave the TextBox in order for the binding to update.