How do I always return the same View, independent of Controller and Action?

Question

I created a View calling for Manutencao that displays a maintenance page. And whenever the Index is called I display it.

public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View("Manutencao");
    }
}

On ASP.NET MVC 5 as I do forever, independent of any Action or Controller return to View "Maintenance" ? So I avoid line repetition return View("Manutencao") in all Action (has about 80).

I need this because I will leave the page offline during the weekend for a DNS migration I mean, I need you to always return this page until I finish this migration.

Answer 1

With additional information it seems that is more or less this:

public class MvcApplication : System.Web.HttpApplication {
    public static void RegisterGlobalFilters(GlobalFilterCollection filters) {
        filters.Add(new CheckForDownPage());
    }
    //o resto do global asax
}
public sealed class CheckForDownPage : ActionFilterAttribute {
    public override void OnActionExecuting(ActionExecutingContext filterContext) {
        var path = System.Web.Hosting.HostingEnvironment.MapPath("~/Down.htm");
        if (System.IO.File.Exists(path) && IpAddress != "1.2.3.4") {
            filterContext.HttpContext.Response.Clear();
            filterContext.HttpContext.Response.Redirect("~/Down.htm");
            return;
        }
        base.OnActionExecuting(filterContext);
    }
}

Source.

Doesn’t look like that’s what it even that. If you don’t solve I’ll erase here.

I don’t know if it’s the best option but I found this:

routes.MapRoute("Offline", "{controller}/{action}/{id}",
    new {
        action = "Offline",
        controller = "Home",
        id = UrlParameter.Optional
        },
    new { constraint = new OfflineRouteConstraint() });

Source. There are some options there.

I put in the Github for future reference.

Has another proposed solution that can serve for complex comas scenarios. It may be what you want, but think about if you really need all this, the question doesn’t seem to need.

Answer 2

Leonardo,

You can create an action filter to intercept all requests when the application is in maintenance mode.

The link below shows how to do this.

https://www.khalidabuhakmeh.com/take-your-asp-net-mvc-application-offline-via-a-global-attribute