Remove a cache item

[jhoefnagels]

I would like to remove a page from the output cache from a controller after a db update but I could not find a way to make this work. The cache key is hard to construct outside the controller that contains the action filter that added the cache item.

[Jan Jongboom]

Let's see if I can find an elegant way to invalidate pages. For now a quick intro on the cache key. It's in MothAction.cs. The cache key consists of min. 2 items:

• Controller name
• Action name
• Hashcodes of Parameter values

The action HomeController.Index(int pageId, string something) where pageId = 3 and something = "hi" will be constructed as:

var items = new List<string>();
items.Add("Home");
items.Add("Index");
items.Add(3.GetHashCode());
items.Add("hi".GetHashCode());

var key = string.Join("|", items.ToArray());

You can delete this item from the cache via:

new AspNetCacheProvider().Store(key, null, new TimeSpan(0, 0, 1));