Question

Given you have:

ControllerA
ControllerB

And in the view for ControllerA you invoke:

@Html.Action("ControllerB", "Home");

In the ‘Home’ action in ControllerB, how can you determine what the originally invoked action & controller were?

I know I can determine the URL from the http context, but for the life of me I cannot figure out how to use this to map back to the originally invoked controller and action.

Nb. The solution I’m looking for must be arbitrary depth. If ControllerB invokes Html.Action on ControllerC which invokes Html.Action on ControllerD, I need to be able to resolve that the original action was ControllerA::Home from ControllerD::Home.

Answer 1

Use the ControllerContext.IsChildAction property to determine if you are in a child action, then the ControllerContext.ParentActionViewContext property contains all the information you need. This has a RouteData property which can give you the controller and action name.