RemoveOutputCacheItem broken after adding querystring

Question

In MVC 3 I was outputcaching a JsonResult like this:

[OutputCache(Location = OutputCacheLocation.Server, Duration = 21600, VaryByParam = "None", VaryByCustom = "tenant")]
    public JsonResult NotifyTasks(int id) {
         return Json(new {pending = 5}, JsonRequestBehavior.AllowGet);
        }
    }

The URL to get the JSON was:

http://localhost/foo/notifytasks/1

At times I invalidate the cache pages with a simple

HttpResponse.RemoveOutputCacheItem("foo/notifytasks");

The method signature has changed and RemoveOutputCacheItem no longer works. The URL now has the querystring ?status=Status1 appended and this broke RemoveOutputCacheItem.

[OutputCache(Location = OutputCacheLocation.Server, Duration = 21600, VaryByParam = "None", VaryByCustom = "tenant")]
    public JsonResult NotifyTasks(int id, string status) {
         return Json(new {pending = 5}, JsonRequestBehavior.AllowGet);
        }
http://localhost/foo/notifytasks/1?status=Status1

How do I get RemoveOutputCacheItem to work with an appended querystring?

Answer 1

I had the same problem, I think it comes down to that RemoveOutputCacheItem only accepts a path and a querystring is not part of the path (path <> url ?).

If you would register a seperate route

routes.MapRoute(
   "DifferentRoute", 
   "{controller}/{action}/{id}/{status}", 
   new { controller = "Information", action = "Index", id = UrlParameter.Optional, status = UrlParameter.Optional } 
            );

then HttpResponse.RemoveOutputCacheItem("foo/notifytasks/1/Status1"); works fine.

I hope this is what you wanted.