有一些链接可以解释如何访问ItemTemplate或DataTemplate中包含的控件:

There are a few links out there explaining how to access controls that are contained inside an ItemTemplate or DataTemplate:

如何访问放置在内部的控件WP7中的ListBox ItemTemplate

Silverlight DataTemplate中的访问元素

希望这会有所帮助，
标记

Hope this helps,
Mark