How to accomplish two-way data binding in WPF?

Question

I have heard a lot about two-way bindings in WPF, but I\'m not entirely clear on how to accomplish it or what it actually means.

I have a ListView with

Answer 1

If you haven't you'll need to implement INotifyPropertyChanged for your class that you're binding to.

Also, when you say you want the ListBox item to be updated immediately, you mean that you want it to change as you type in the TextBox. By default the TextBox.Text property updates its source when it loses focus, but you can change this by setting the binding UpdateSourceTrigger to PropertyChanged:

{Binding Source={...}, Path=Whatever, UpdateSourceTrigger=PropertyChanged}