How do I determine at runtime whether the style applied to an object is the default style?

I want to be able to apply a style at runtime to an object ONLY if the current style is the default style. I don't want to override any user defined styles. Anyone know how to do this?

From stackoverflow

• Check the DefaultStyleKeyProperty, which is a static property of any custom control.

  string styleKeyName = DefaultStyleKeyProperty.Name;
  

  Usually if there is no style associated with the control, the Name will be "DefaultStyleKey"

• It appears you can do it this way:

  DependencyPropertyHelper.GetValueSource(
      someControl, FrameworkElement.StyleProperty).BaseValueSource 
      == BaseValueSource.Default;
  

  You can wrap that up in an extension method like this:

  static public bool HasDefaultStyle(this FrameworkElement item)
  {
      return DependencyPropertyHelper.GetValueSource(
          item, FrameworkElement.StyleProperty).BaseValueSource 
          == BaseValueSource.Default;
  }
  

  Then you can just call someControl.HasDefaultStyle().

  Also, have a look at this article: Default Templates in WPF

  Micah : Bonus points for the extension method idea!!