Question

Ok, so I have an abstract class called Product. I have 3 tables called Items, Kits, and Packages that implement Product. Product has a public property that exposes the object’s primary key.

That said I have a form where I pass a product. I would would like to pull that product out of a fresh datacontext without having to write a big switch reflecting it’s type to get its proper table.

I wanted to do something like this but the cast bit won’t accept foo.

public BuilderInclusionsForm(Product p) : this()         {                         Type foo = p.GetType();             product = db2.GetTable(p.GetType()).Cast<foo>().SingleOrDefault(a =>                  a.ProductID == p.ProductID); 

or this:

public BuilderInclusionsForm(Product p) : this()         {                         Type foo = p.GetType();             product = db2.GetTable(p.GetType()).OfType<foo>().SingleOrDefault(a =>                  a.ProductID == p.ProductID);    

Answer 1

With thanks to Mr. Skeet a bright member of my team pointed out the following solution.

public BuilderInclusionsForm(Product p) : this() {     IEnumerable<Product> ps = db2.GetTable(p.GetType()).Cast<Product>();     product = ps.SingleOrDefault(a => a.ProductID == p.ProductID); } 

Sorry to waste your time. Please don’t garbage collect my sorry ass John. =oD