如何在Silverlight中合并样式？

我的目标是扩展已设置的对象样式.假设我有以下两种风格：

<Style targettype="Ellipse" x:Key="OriginalStyle">
    <Setter Property="Fill" Value="Blue"/>
    <Setter Property="Width" Value="100"/>
    <Setter Property="Height" Value="200"/>
</Style>
<Style targettype="Ellipse" x:Key="NewStyle">
    <Setter Property="Fill" Value="Red"/>
</Style>

我想做的是将OriginalStyle分配给Ellipse,然后应用第二种样式只更改它影响的属性.理想情况下,我想做这样的事情：

Style OriginalStyle;
Style NewStyle;
Ellipse ellipse = new Ellipse();
ellipse .Style = OriginalStyle;
// Later in an event hanler
ellipse.Style = NewStyle; // I would want to keep the settings from the old style in here: in this example setting the style like this would make me lose the Width and Height properties!

我试图动态构造一个新的Style并添加NewStyle和OldStyle的属性 – 但是样式的Property属性总是为null所以这导致死胡同：

Style combinedStyle = new Style();
foreach (Setter setter in Old.Setters)
{
     combinedStyle.Setters.Add(setter);  // Get exception "Element is already the child of another element."
}
foreach (Setter setter in NewStyle.Setters)
{
     combinedStyle.Setters.Add(setter);  // Get exception "Element is already the child of another element."
}

似乎无法在Silverlight中动态合并样式.有人可以证实这一点,或者告诉我一个更好的方法来实现合并吗？

解决方法

“BasedOn”是否适用于Silverlight？ // wpf开发者,永远不会确定