Working with the Output Cache and other Action Filters

Question

I have added Output Caching to a couple of actions in my app for some easy performance boosts. However, these actions also need to increment a counter after each request (it

Answer 1

The reason is actually in the .NET source, and nothing to do with the DonutOutputCache:

public void SetCacheability(HttpCacheability cacheability)
{
  if (cacheability < HttpCacheability.NoCache || HttpCacheability.ServerAndPrivate < cacheability)
    throw new ArgumentOutOfRangeException("cacheability");
  if (HttpCachePolicy.s_cacheabilityValues[(int) cacheability] >= HttpCachePolicy.s_cacheabilityValues[(int) this._cacheability])
    return;
  this.Dirtied();
  this._cacheability = cacheability;
}

In other words, if you set NoCache first (a value of 1), it will always return if you try to set a higher value, such as 4 (public).

The only solution is to fork the project and extend it to how you require, or perhaps send a pull request to mark protected ICacheHeadersHelper CacheHeadersHelper in DonutOutputCacheAttribute