The fix here is to do some cleanup we've been planning to do for a while,
rather than flowing IUrlHelper and IComponentHelper as part of the
ViewContext, they now are just grabbed from the service provider.
This simplifies the code for invoking a view, and gets us closer to the
desired API surface of ViewContext
This doesn't add any new extensibility, and will likely change again in
the future when we add extensibility. For now this is a stopgap to reduce
duplication between JsonResult and JsonViewComponentResult.
- move `DynamicObject` derivation up to new `DynamicViewData` class, fixing [WebFx-169](http://projectk-tc:8080/browse/WEBFX-169)
- avoid direct `_data` lookup in previous `TryGetMember()`, fixing [#118](https://github.com/aspnet/WebFx/issues/118)
- rename ViewData -> ViewDataDictionary
Also
- flesh out `IDictionary<string, object>` implementation in `ViewData`
- provide `ViewData` copy constructor that allows TModel to change
- remove `TryGetIndex()` and `TrySetIndex()` implementations; use `ViewData[]` instead
- restore `ViewContext.ViewBag` from legacy MVC
Ryan Nowak
Pranav K
N. Taylor Mullen
dougbu