removing Output cache in Index view on update in asp.net mvc

Question

I'm using output caching for some Index views because they contain a lot of data. I want to keep it specific for every user. because the view can differ depending on the roles.

    [OutputCache(Duration = 3600, VaryByParam = "none", Location = OutputCacheLocation.Client)]
    public ActionResult Index(string schooljaarparam) {
        return View(_db.Lesplaatsens.Where(l => l.Schooljaar.Sch_Schooljaar == schooljaarparam).OrderBy(q => q.Lpl_Gemeente).ThenBy(q => q.Lpl_Instelling).ToList());
    }

Now when someone creates a new item and returns to the Index view. How do I remove the cache of the Index page, so that the newly created item will show up in the list?

I thought this would be a common question but I did not find a solution yet.

I guess you need to use HttpResponse.RemoveOutputCacheItem() but how do I find the route. And where can I see the current cached items in the debugger?

Answer 1

You can't remove the cached item because it isn't there (ie you are not caching it on the server).

When you say Location = OutputCacheLocation.Client, the browser will cache the response and won't even send a new request to your server when the user asks for the same page unless the cache expires or the user specifically asks for the latest version by hitting F5.