WPF Watermark PasswordBox from Watermark TextBox

Question

I am using a Watermark textbox as in Watermark TextBox in WPF

Answer 1

you can show/hide the background by yourself instead of using triggers:

XAML:

Code behind:

// helper to hide watermark hint in password field
private void passwordChanged(object sender, RoutedEventArgs e)
{           
    if (passwordBox.Password.Length == 0)
        passwordBox.Background.Opacity = 1;
    else
        passwordBox.Background.Opacity = 0;
}