Equiv. to Coalesce() in XAML Binding?

Question

In SQL I can do this:

Select Coalesce(Property1, Property2, Property3, \'All Null\') as Value
From MyTable 

If Property1, 2 and 3 are all n

Answer 1

The PriorityBinding is only looking for DependencyProperty.UnsetValue to advance to the next Binding. Since Property1 exists it is set and the PriorityBinding is taking the value of it.

For a pure XAML solution, this Style will do the job:

Although, it's a bit convoluted way of doing it, and IMHO, doesn't belong in the UI but in the ViewModel.