Question

Scenario:

Clicking a delete hyperlink on one product of a product list will invoke /Product/Delete HttpGet action method. The user then clicks the confirmation button to invoke /Product/Delete HttpPost action method which in turn redirect the user to /Product/Deleted HttpGet action method.

I want to prevent users from skipping /Product/Delete and directly invoking /Product/Deleted.

Answer 1

Before redirecting put something into TempData. Then in the Deleted action verify if this something is present in the TempData.

[HttpPost]
public ActionResult Delete()
{
    // TODO: Delete
    TempData["deleted"] = true;
    return RedirectToAction("deleted");
}

public ActionResult Deleted()
{
    if(TempData["deleted"] == null)
    {
        throw new HttpException(404, "not found");
    }
    return View();
}

You should be aware that there is a price to pay with this. If the user presses F5 while browsing the /product/deleted action he will get 404. So basically what you are trying to do is bad design and I would recommend you avoiding it.