LostFocus (TextBox) vs. Buttons IsDefault-Property

If you bind the Text-Property of a TextBox to something, the "something" is updated when the TextBox loses focus. This is the Default-UpdateSourceTrigger defined in the Metadata for the TextBox.TextProperty. In a Data Binding you can specify another UpdateSourceTrigger, like e.g. PropertyChanged. If a TextBox has LostFocus as UpdateSourceTrigger, which is the default, you can get [...]

Lesen Sie den vollständigen Eintrag unter http://www.thomasclaudiushuber.com/blog/2008/05/02/lostfocus-textbox-vs-buttons-isdefault-property/