WPF DataGrid binding custom row header give me suggestion

I am t开发者_如何学编程rying to do togglebutton visiblity change on true/false properties, my togglebutton in row header template, I also create convert for change properties.

Visibility="{Binding Path=col1, Converter={StaticResource ResourceKey=DemoConvertor}}"  

refer this like: https://skydrive.live.com/P.mvc#!/selectembed.aspx/.Public/dgRowToggleButtonSample.zip?ref=11&cid=0c0b4f9d80b744cd&sc=documents