This change moves the responsibility for saving TempData into a filter,
which is registered with other View features. This moves TempData into the
ViewFeatures package.
ActionResults which require TempData to be kept use a new marker interface
which is handled by the filter.
- #2825
- new class names align with existing types such as `HttpNotFoundResult` and `HttpNotFoundObjectResult`
- remove similar types from WebApiCompatShim and use replacements in `ApiController`
- `NegotiatedContentResult<T>` remains because Core doesn't have an exact replacement
nits:
- add missing periods in some `Controller` doc comments
Makes it easier to render a view component from inside a controller. This
makes it possible to implement behavior where an ajax request refreshes
part of a page.
- Changing HtmlHelper and HelperResult to implement IHtmlContent.
- Introducing BufferedHtmlContent.
- Making RazorPage handle only IHtmlContent and clearing out other types.
- Making StringCollectionTextWriter use BufferedHtmlContent so that it can be returned where necessary.
- Updating places which involve Write/Copy to pass in encoders.
- The encoders are currently not being used during write. But when HtmlString is modified to carry encode metadata, the encoder can be used for writing. This is a perf optimization and hence not a part of this change.
- Making TagHelperContent implement IHtmlContent.