Exemplo n.º 1
0
        public override void OnValueChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        {
            if (!(sender is PasswordBox passwordBox))
            {
                throw new NotSupportedException($"{nameof(MonitorPasswordProperty)} may only be attached to a PasswordBox");
            }

            // Remove any previous events
            passwordBox.PasswordChanged -= PasswordBox_PasswordChanged;

            // If the caller set MonitorPassword to true...
            if ((bool)e.NewValue)
            {
                // Set default value
                HasTextProperty.SetValue(passwordBox);

                // Start listening out for password changes
                passwordBox.PasswordChanged += PasswordBox_PasswordChanged;
            }
        }