Linq for objects - linq

Question

I have:
public class Basket
{
public int BasketId { get; set;}
public string Name { get; set;}
public virtual ICollection<BasketItem> BasketItems {get; set;}
}
public class BasketItem
{
public int BasketItemId { get; set;}
public string Name { get; set;}
public int BasketId { get; set;}
public int ProductId { get; set; }
public virtual Product product { get; set;}
}
public class Product
{
public int ProductId { get; set;}
public string ProductName { get; set; }
}
Can anyone know how to query in linq to retrieve BasketList which includes basketItems list and prodcut ?
Sorry: The question had confused. I'm trying retrieve basketList with this:
(from b in Baskets
join bi in BasketItems on b.Id equals bi.BasketId
join pp in Products on bi.ProductId equals pp.Id
where b.Id == 10001
select b).ToList()
Product is not included in basketItems with above linq query. I've updated the question.

Answer 1

You've set up your objects like a relational database with ProductId and BasketId as foreign keys onto a BasketItem "table". It is better to embed your "sub" classes into your container class. That makes using Linq to query much easier.
Try:
public class BasketItem
{
public int BasketItemId { get; set; }
public string Name { get; set; }
public Basket Basket { get; set; }
public Product Product { get; set; }
}
public class Basket
{
public int BasketId { get; set; }
public string Name { get; set; }
}
public class Product
{
public int ProductId { get; set; }
public string ProductName { get; set; }
}
private void SetupAndQuery()
{
#region setup data objects
Product product01 = new Product {ProductName = "Whizzo", ProductId = 12345};
Basket basket01 = new Basket {Name = "Johns Basket", BasketId = 34535987};
Product product02 = new Product { ProductName = "Blammo", ProductId = 54321 };
Basket basket02 = new Basket { Name = "Susans Basket", BasketId = 23546758 };
List<BasketItem> basketItems = new List<BasketItem>();
BasketItem basketItem01 = new BasketItem();
basketItem01.BasketItemId = 12365;
basketItem01.Name = "Erm";
basketItem01.Basket = basket01;
basketItem01.Product = product01;
basketItems.Add(basketItem01);
BasketItem basketItem02 = new BasketItem();
basketItem02.BasketItemId = 15478;
basketItem02.Name = "What";
basketItem02.Basket = basket02;
basketItem02.Product = product02;
basketItems.Add(basketItem02);
#endregion
#region Query
//The 2 code blocks below do the same thing
//Foreach/If version of the Query
foreach (BasketItem item in basketItems)
{
if (item.Product.ProductId == 54321)
{
//Do stuff here
}
}
//LINQ version of the Query
foreach (BasketItem item in basketItems.Where(item => item.Product.ProductId == 54321))
{
//Do stuff here
}
#endregion
}
You may want to change what types go inside other types. I suggest Basket at the top and a Product list inside that. BasketItem looks unnecessary.