Remove action from Output Cache

I'm not completely sure about your case, but I found about child actions on view: they use their own cache (not System.Web.HttpContext.Current.Cache), which you can access through static member

CacheOutputAttribute.ChildActionCache

Cache of child actions has pretty complicated key, which I was not able to calculate. So, I end up with solution to add a new variable(such a version or timestamp) to my model and pass it as parameter to action method; so I can invalidate my cache with changing this property.

However I'm not 100% sure it is your case, as you are doing not child action caching.

I ended up using this code and it works great!

http://antix.co.uk/Blog/IfModifiedAttribute