Know the properties of the class that contains a collection of objects through the objects

See more:

C#

WPF

Hi everybody,

I have this structure for my program (it's a simple book management).
MyLibraries

-Library1
--Shelf1
---Book1
----Cover (img)
----Metadata (XML, contains things such as publisher's name and so forth)
----BookFile (
---Book2
----...
---Book3
--Shelf2
---...
-Library2
--...

And so forth.
So these are the classes I created:

public class Book:INotifyPropertyChanged{
   //...other properties
   public string Path
}

public class Shelf{
   public string Name;
   ObservableCollection<Book> BooksOnShelf;
}

public class Library {
   ObservableCollection<Shelf> Shelves;
   public string Name;
}

The libraries are stored on disk in a particular fixed location and the folder tree follows the Library-Shelf-Book tree (so if I have "Basic C++" under "C++" shelf which is under "Computer Science" Library, the folder the book is stored in is "<mylibrariesfolder>/Computer Science/C++/Basic C++").

The problem is to calculate the path from the Book class based on which collection contains it.

I came up with two solution (but I do not particularly like them):

1. Add a Shelf object to the book and a Library object to the Shelf so that I can get the parent Shelf of a book and the parent Library of a Shelf

2. Create method inside Shelf that gets the path of the book and a method inside Library that gets the path of a shelf. Then I combine them together.

I do not like both, so my question is: is there another solution, cleaner and more "error-safe" than mines?

Thanks a lot for your help and time.

Gianmarco L.