Question

I have a database that has two tables: Order and Product. This database is exposed via an Entity Data Model and LINQ-to-Entities.

I have a product ID and I want to get all of the Order objects that reference the Product. I would like to learn how to do this with LINQ. I know I can query the products

int productID = GetProductID();
using (DatabaseContext database = new DatabaseContext())
{
  var products = from product in database.Products
               where product.ProductID = productID
               select product;

}

I know this LINQ query get me all of the products with a specific product ID. However, I want the Order objects. I was trying to figure out to do a Join and get the just the Order objects. I do not care about the products as I have the product id. Is there a way to do this?

Thank you!

Answer 1

 var orders = from product in database.Products
            join order in database.Orders on product.Key equals order.KeyField 
           where product.ProductID == productID
           select order;