Textbox.Selectall() works when going through the keyboard, when simulo no

Question

Good staff,

I have a way for 3 Textbox to run when they win Focus:

private void NumericKeyboardTextBox_GotFocus(object sender, RoutedEventArgs e)
{
    e.Handled = true;
    this.textBoxForNumeric = sender as TextBox;
    this.textBoxForNumericFirstTime = true;
    this.textBoxForNumeric.Focus();
    this.textBoxForNumeric.SelectAll();
}

By a point break it stops there is the enter given by the keyboard or by the simulation. When it is through the keyboard it always selects everything that is inside the Textbox, when it is through the simulation of the Key.Enter goes through the top but does not do the SelectAll();

Here’s how I’m simulating the key enter (which is from a number keyboard I made in WPF)

Keyboard.FocusedElement.RaiseEvent(new KeyEventArgs(Keyboard.PrimaryDevice, PresentationSource.FromVisual(this.textBoxForNumeric), 0, Key.Enter)
{
    RoutedEvent = Keyboard.KeyUpEvent
});

By pressing the enter button on the keyboard I made, it passes the method but does not do the SelectAll to TextBox

What could be wrong here ?

Edit.

Added the Events to the Keyup

#region Events for KeyUp for the TextBoxPrice & TextBoxNewQtd
private void textBoxBarCodToSearch_KeyUp(object sender, KeyEventArgs e)
{
    if (e.Key == Key.Enter)
    {
        if (!String.IsNullOrEmpty(this.textBoxBarCodToSearch.Text))
        {
            FindProdForEventsDataGridAllProds(this.textBoxBarCodToSearch.Text);
        }
    }
}

private void textBoxPrice_KeyUp(object sender, KeyEventArgs e)
{
    if (e.Key == Key.Enter)
    {
        this.textBoxNewQtd.Focus();
    }
}

private void textBoxNewQtd_KeyUp(object sender, KeyEventArgs e)
{
    if (e.Key == Key.Enter)
    {
        BindingExpression binding = this.textBoxNewQtd.GetBindingExpression(TextBox.TextProperty);
        binding.UpdateSource();
        AddNewProdToDoc();
    }
}
#endregion

Edit 2:

This is how the method was initially NumericKeyboardTextBox_GotFocus

private void NumericKeyboardTextBox_GotFocus(object sender, RoutedEventArgs e)
{
    // Passar para a variavel para saber qual o texto a modificar com o teclado virtual criado na WPF
    // As 2 linhas abaixo é como tinha inicialmente, o resto foi adicionado/removido para ver se resolvia o problema
    this.textBoxForNumeric = sender as TextBox;
    (sender as TextBox).SelectAll();
}