Question

I need to run a certain function in every ActionResult and return a certain value if necessary.

Let’s say this function’s name is A(). I can do this manually:

ActionResult Index() {
     if (...) return A();
     ...
}

ActionResult About() {
     if (...) return A();
}

Or I can use the Initialize() method:

override void Initialize(RequestContext r) {
    A(); // Can't do a return here
}

But the problem is that I can’t return an ActionResult value since it’s void.

Is there any way to do this?

Answer 1

You can do this with Action Filters.

public class MyActionFilter : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        if (...) {
            // modify filterContext as needed
        }
    }
}

Then you can add [MyActionFilter] to controllers and/or actions