C# delegate or Func for 'all methods'?

i've read something about Func's and delegates and that they can help you to pass a method as a parameter. Now i have a cachingservice, and it has this declaration:

public static void AddToCache<T>(T model, double millisecs, string cacheId) where T : class
public static T GetFromCache<T>(string cacheId) where T : class

So in a place where i want to cache some data, i check if it exists in the cache (with GetFromCache) and if not, get the data from somewhere, and the add it to the cache (with AddToCache)

Now i want to extend the AddToCache method with a parameter, which is the class+method to call to get the data Then the declaration would be like this

public static void AddToCache<T>(T model, double millisecs, string cacheId, Func/Delegate methode) where T : class

Then this method could check wether the cache has data or not, and if not, get the data itself via the method it got provided.

Then in the cal开发者_如何学编程ling code i could say:

AddToCache<Person>(p, 10000, "Person", new PersonService().GetPersonById(1));
AddToCache<Advert>(a, 100000, "Advert", new AdvertService().GetAdverts(3));

What i want to achieve is that the 'if cache is empty get data and add to cache' logic is placed on only one place.

I hope this makes sense :)

Oh, by the way, the question is: is this possible?

You probably want:

public static void AddToCache<T>(T model, double millisecs, string cacheId, 
   Func<T> methode) where T : class;

Usage:

AddToCache<Person>(p, 10000, "Person", 
       () => new PersonService().GetPersonById(1));

Like this:

public static void AddToCache<T>(T model, double millisecs, string cacheId, Func<T> getValueFunction ) where T : class
{
  // if miss:
  var person = getValueFunction.Invoke();
}

The call would look like:

AddToCache( p , 1, "Person", () => new PersonService().GetPersonById(1) );

You might want to read this blog post: Get Your Func On . It discusses the problem you are solving with the same approach.