Question

In child action method, i need to know which action method invoked before me so i can detect which action method cause to invoke me.

How can i know it ?

Answer 1

Inside a child action simply use the ParentActionViewContext:

[ChildActionOnly]
public ActionResult Foo()
{
    var parentActionName = ControllerContext
        .ParentActionViewContext
        .RouteData
        .GetRequiredString("action");
    ...
}