Question

I have this query that I tried to join 2 tables together, one which holds the product name, and product numbers, and take a product number, and go to the other where to find a Art_no which is like the product number.

ProductNamesList = (From ProductSeries In context.Products
                             From ProductRevisions In context.TestResults
                             Where ((ProductSeries.Product = CurrentProduct) And (ProductRevisions.Art_no.Contains(ProductSeries.Product_no)))
                             Order By ProductRevisions.Art_no
                             Select ProductRevisions.Art_no).Distinct.ToList

Hope anyone can help,
Thank you.

Answer 1

Check the post : SQL to LINQ ( Case 7 – Filter data by using IN and NOT IN clause)

you solution is divided into two queries as below

//first get the list of product which satisfy your condition

    var ids = (from p in context.Products
              Where p.Product = CurrentProduct
              select p.Product_no).ToList();

//second filter the revision products by using contains

    var myProducts = from p in context.TestResults
                     where ids.Contains(p.Art_no)
                     Order By p.Art_no
                     Select p.Art_no;