windows phone7中的数据绑定的实现，这在app开发中非常重要，数据绑定通过页面之间的交互达到数据绑定，减轻页面数据传输的压力，减少程序员的繁琐流程-cumbersome process of data binding windows phone7 the realization, which is very important in app development, the data binding achieved by the interaction between the pa