One of the common tasks in the development of responsive applications is the AJAX execution of a controller method. Sometimes, we need to execute the method with some parameters (or method arguments). Let's consider a simplified version of the library example; we will keep only the number of books. In the following example, the business model needs three methods: the addition of one book, the addition of two books, and the addition of three books. Of course, we can implement three different methods for these tasks. However, a single method with an argument is a more flexible approach.

The Model will be as follows:

public class LibraryModel
{
  public int AmountOfBooks { get; set; }

  public void AddBooks(int count)
  {
    AmountOfBooks += count;
  }
}

The Controller will be as follows:

public class LibraryController : KnockoutController
{
  public ActionResult Index()
  {
    return View(new LibraryModel());
  }

  public ActionResult AddBooks(LibraryModel...