问题帖子
https://social.msdn.microsoft.com/Forums/windowsapps/en-US/68d0e47d-c974-47b9-a6b8-d55b4989d732/uwp-xaml-eventtriggerbehavior-item-select-right-tapped?forum=wpdevelop
mvvm实现
Behavior SDK的behavior和action组件能够将特定元素的事件和参数传递到相应模型上，这对于使用MVVM框架来说是十分方便的。
Windows通用应用开发手记－Behavior SDK概述 :http://www.cnblogs.com/mantgh/p/4437892.html?utm_source=tuicool&utm_medium=referral
在Windows 8.1 store 应用中使用Behavior :http://blogs.msdn.com/b/hanxia/archive/2013/10/17/windows-8-1-store-behavior.aspx
How to execute command from GridViewItem Tap event (XAML) ： http://stackoverflow.com/questions/19940209/how-to-execute-command-from-gridviewitem-tap-event-xaml