Search ranking in LINQ, MVC 3 and Entity Framework - asp.net-mvc

Question

Previously in SQL I would use something like this to rank my search results:
--search product name
SELECT tblProduct.ProductID, 20 AS Ranking
FROM tblProduct
INNER JOIN tblManufacturer ON tblProduct.ManufacturerID=tblManufacturer.ManufacturerID
LEFT OUTER JOIN tblProductCollection ON tblProduct.CollectionID=tblProductCollection.CollectionID
WHERE tblManufacturer.Name + ISNULL(' ' + tblProductCollection.CollectionName, '') + ' ' + tblProduct.Name LIKE '%' + #term + '%' AND tblProduct.Active = 1
UNION ALL
--search product exact name
SELECT tblProduct.ProductID, 200 AS Ranking
FROM tblProduct WHERE Name = '%' + term AND tblProduct.Active = 1
UNION ALL
This example says if your search term is contained in the name: 20 is the rank, if you match the name exactly: 200 is the rank. Union the tables together, order by Ranking(descending) and hey presto!
I'm trying to do this in LINQ this time round and am unsure how to go about doing it, to be honest I'm unsure my previous example was the best way to do it originally.
So, I have a Product Entity mapped to my database and I've added a property in my partial class called SearchRanking:
var query = from p in db.Products
where p.Name.Contains(term)
select p;
var query2 = from p in db.Products
where p.Name.ToLower() == term
select p;
Somehow I need to set the properties like so:
var query = from p in db.Products
where p.Name.Contains(term)
select p, p.SearchRanking = 20;
var query2 = from p in db.Products
where p.Name.ToLower() == term
select p, p.SearchRanking = 200;
Am I on the right track?

Answer 1

If you're wanting to create a new anonymous type you could do this:
var foundProducts = (from p in products
where p.Name.Contains(term)
select new Product
{
ProductId = p.ProductId,
Category = p.Category,
Brand = p.Brand,
SearchRanking = p.Name.ToLower() == term ? 200 : 20
}).OrderBy(s => s.SearchRanking).Take(20);

Answer 2

I would do something like this;
var query = (from p in db.Products
where p.Name.Contains(term)
select p).ToList().ForEach(p => p.SearchRanking = 20);
A more efficient way would be to;
var query = (from p in db.Products
where p.Name.Contains(term)
select new Product
{
Id = p.Id,
//set the other props here
SearchRanking = 20
}).ToList();