public override void OnValueChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
var passwordBox = (PasswordBox)sender;
var bindingMarshaller = passwordBox.GetValue(_passwordBindingMarshallerProperty) as PasswordBindingMarshaller;
if (bindingMarshaller == null)
{
bindingMarshaller = new PasswordBindingMarshaller(passwordBox);
passwordBox.SetValue(_passwordBindingMarshallerProperty, bindingMarshaller);
}
bindingMarshaller.UpdatePasswordBox(e.NewValue as SecureString);
}
private static void AttachedPropertyValueChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
// we'll need to hook up to one of the element events
// in order to allow the GC to collect the control, we'll wrap the event handler inside an object living in an attached property
// don't be tempted to use the Unloaded event as that will be fired even when the control is still alive and well (e.g. switching tabs in a tab control)
var passwordBox = (PasswordBox)d;
if (!(passwordBox.GetValue(PasswordBindingMarshallerProperty) is PasswordBindingMarshaller bindingMarshaller))
{
bindingMarshaller = new PasswordBindingMarshaller(passwordBox);
passwordBox.SetValue(PasswordBindingMarshallerProperty, bindingMarshaller);
}
bindingMarshaller.UpdatePasswordBox(e.NewValue as SecureString);
}
