解决方案1: https://oren.codes/2014/12/31/datatemplateselector-for-xamarin-forms/
解决方案2: https://docs.microsoft.com/en-us/xamarin/xamarin-forms/app-fundamentals/templates/data-templates/selector
转载于:https://www.cnblogs.com/mschen/p/10443502.html
相关资源：数据结构—成绩单生成器
