TextBox and default Button binding does update too late

Question

I\'ve got a simple WPF dialog with these two controls:

Answer 1

Add the UpdateSourceTrigger to your TextBox with the value PropertyChanged. The default behavior of the Textbox is to update the source, when it´s lost focus.

<TextBox Text="{Binding MyText, UpdateSourceTrigger=PropertyChanged}"/>

Answer 2

One Solution ist, to create your own Class OKButton that calls Me.Focus in the OnClick-Method. This will be called before the Click_Event and before any Command that is bound to the button. You just have to remember to use an OKButton instead of setting IsDefault=True

Public Class OKButton
  Inherits System.Windows.Controls.Button

  Public Sub New()
  MyBase.New()
  Me.Content = "OK"
  Me.IsDefault = True
  End Sub

  Protected Overrides Sub OnClick()
  Me.Focus()
  MyBase.OnClick()
  End Sub
End Class

Answer 3

Try this. This code moves focus on the button clicked. Thus binding completes before command processed.

    public App()
    {
        EventManager.RegisterClassHandler(typeof(Button), Button.ClickEvent, new RoutedEventHandler(GenericButtonClickHandler));
    }

    void GenericButtonClickHandler(object sender, RoutedEventArgs e)
    {
        var button = sender as Button;
        if (button == null)
            return;
        if (button.IsDefault)
            button.Focus();
    }