Azure Redis Cache and MVC Child Actions - azure

Question

I have successfully implemented Azure Redis Cache using the Microsoft RedisOutputCacheProvider from NuGet which works as expected for general pages.
[ChildActionOnly]
[ChildActionOutputCache(CacheProfile.StaticQueryStringComponent)]
public ActionResult Show(int id)
{
// some code
}
However, I can't seem to get it to work for child actions. Prior to using Redis Cache, it was working using the default OutputCacheProvider.
Does anyone have any ideas, or is it simply a limitation?
Thanks in advance

Answer 1

In your Global.asax.cs, set a custom child action output cache that talks to Redis:
protected void Application_Start()
{
// Register Custom Memory Cache for Child Action Method Caching
OutputCacheAttribute.ChildActionCache = new CustomMemoryCache("My Cache");
}
This cache should derive from MemoryCache and implement the following members:
/// <summary>
/// A Custom MemoryCache Class.
/// </summary>
public class CustomMemoryCache : MemoryCache
{
public CustomMemoryCache(string name)
: base(name)
{
}
public override bool Add(string key, object value, DateTimeOffset absoluteExpiration, string regionName = null)
{
// Do your custom caching here, in my example I'll use standard Http Caching
HttpContext.Current.Cache.Add(key, value, null, absoluteExpiration.DateTime,
System.Web.Caching.Cache.NoSlidingExpiration, System.Web.Caching.CacheItemPriority.Normal, null);
return true;
}
public override object Get(string key, string regionName = null)
{
// Do your custom caching here, in my example I'll use standard Http Caching
return HttpContext.Current.Cache.Get(key);
}
}
More info on my blog post