WPF binding OneWayToSource sets source property to “” when the DataContext is changed

Question

I have a OneWayToSource binding that is not behaving as I expected when I set the DataContext of the target control. The property of the source is being set to default inste

Answer 1

Its a bug or perhabs not. Microsoft claims its by design. You first type x and then you kill DataContext by clicking on Button hence why the TextBox holds x and your viewModel.Text property gets newly initialized (its empty). When on datacontext changed getter will still be called. In the end you have no chance to fix this.

You can however use two way and let it be.