What is the differences between ViewData
and viewmodel
(所有我知道他们习惯于从控制器传递一些形式的数据来查看),也许告诉我应该使用ViewData而不是viewmodel的情况,反之亦然
提前致谢！
出击
解决方法
简而言之,使用ViewData作为支持数据,例如SelectList的数据源.
视图模型：
When a Controller class decides to render an HTML response back to a
client,it is responsible for
explicitly passing to the view
template all of the data needed to
render the response. View templates
should never perform any data
retrieval or application logic – and
should instead limit themselves to
only have rendering code that is
driven off of the model/data passed to
it by the controller.[…]
When using [the “viewmodel”] pattern we create strongly-typed classes that are optimized for our specific view scenarios,and which expose properties for the dynamic values/content needed by our view templates. Our controller classes can then populate and pass these view-optimized classes to our view template to use. This enables type-safety,compile-time checking,and editor intellisense within view templates.
