Programming Data-Driven Web Applications with ASP.NET

Using the HttpCachePolicy Class to Enable Output Caching

As previously mentioned, the @OutputCache directive is derived from the HttpCachePolicy class, which gives you lower-level access to the output cache. The HttpCachePolicy class is exposed through the HttpResponse.Cache property; and it is a member of the System.Web namespace. You would want to use the HttpCachePolicy rather than the @OutputCache when you need to dynamically set the output cache settings. For instance, if you want to dynamically set how long the item should remain in the cache.

The @OutputCache directive exposes nearly all the functionality available from using the HttpCachePolicy class, but the class does offer more functionality than @OutputCache. For instance, when using ...