title: How to change wpf combobox selection with another control (e.g. button)?
body: <p>I have a combobox and two buttons on the same page.  The buttons are "Previous" and "Next".  Ideally I'd like to use the buttons to select combobox items accordingly.  Also, I'd like "Next" and "Previous" buttons to be disabled when end or beginning of the list is reached.  I don't think I would have a problem with doing this in code-behind but I wonder if this is possible through xaml/binding/mvvm.  Thanks. </p>