Can I change the properties of a binding in a DataTrigger, without knowing the binding itself?

Question

I have a TextBox style that formats a number if the box is unfocused, but leaves the number unformatted whlie it\'s being edited.

This is the style I wa

Answer 1

My attempt to solve this ended up with a custom control plus a multi-binding, both of which where suggested above.

This allowed me to use markup like this:

< CustomTextBox Value="{Binding Value"} Format="N2" />

I tried to post my code but I keep getting an error about "code that is not properly formatted as code".