Recently I discovered that there’s no one standard way for AJAX-driven server-side paging in ASP.NET MVC (in Web API, you can expose an IQueryable). For the case in hand, I decided to use PagedList for the server bit of the game.
The PagedList interface looks a bit like this (for demonstration only, real code is a bit different, check its source code for the real stuff):
It provides nice properties for paging, and exposes itself as enumerable and has an indexer. Apart from this snippet, the library also provides an extension method ToPagedList() to apply to any enumerable and allow it to populate the properties from it (by enumerating on it, and by calling the Count() method).
The JSON.NET Serialization Problem
Well, yes, except when you have a custom collection like PagedList, and you want to treat it as an object that has several properties, not as an array. JSON.NET does provide a solution for this actually, all you need to do is apply the [JsonObject] attribute to your class.
Unless you don’t own the source code of this class.
In this case, you need to inherit from it. By doing this, I lose the nice ToPagedList() extention method (because it creates an object of the PagedList class directly), but luckily it does nothing but calling new PagedList() with the parameters we give it, so, we don’t lose much.