Avoiding duplication of code that occurs for every action in the controller

Question

I have a controller that serves multiple pages. Each page has the following code:

public class SchoolController : Controller
{
    private UnitOfWork _unitOfWork = new UnitOfWork();

    public ActionResult Details()
    {
        var viewModel = new RegistryViewModel();

        School schoolBeingAccessed = _unitOfWork.SchoolRepository.GetLoggedinSchool();

        if (!schoolBeingAccessed.IsActive())
        {
            return RedirectToAction("NotActive");
        }
        if (!schoolBeingAccessed.IsExpired())
        {
            return RedirectToAction("Expired");
        }

        .....
   }

How can I avoid duplicating this code? I can put this code in a function, but then I need to remember about calling the function from each action in the controller.

Normally I would use something like Html.Action ("CheckSchoolStatus") on the _Layout page, however I cannot do this because I am redirecting and you cannot redirect it from a child action.

Is it possible to call this code from the layout page? Or should I use a base controller? How does it work if each view has its own ViewModel?

Answer 1

Action Filters.

:

. IActionFilter . IActionFilter : OnActionExecuting OnActionExecuted. OnActionExecuting . OnActionExecuted , , , .