I have a textbox which is bound to a field on an entity. I need to run some code whenever the entity's field changes. I've tried calling my code in the textbox's Text_Changed event, but referring to the entity's field at this point in time does not reflect the value entered in the textbox.

At what point in time would the entity's field get updated with the value entered in the textbox?

Or is there another way to trap/raise an event when the entity's filed changes?