Question

I am trying to convert this short SQL statement into linq but I am facing some difficulties, here’s my latest attempt, apparently it has an error:

SQL:

select ProductID from products where
categoryID in (select categoryID from categories_sub 
               where categoryID='15' and category_sub_name = 'chiffon')

Linq:

’15’ and ‘chiffon’ is replaced by parameter ‘cID’ and ‘subCatID’ here:

IQueryable<Categories_Sub > cat = (from c in db.Categories_Sub
                             where c.CategoryID == cID
                              & c.Category_Sub_ID == subCatID
                             select c);   


var subcat = (from c in db.Products
              where cat.Contains(c.ProductID)
              select c); 

Answer 1

Try

var Result = from p in products 
               from subc in categories_sub 
               where subc.categoryID=15 and 
                     subc.category_sub_name = "chiffon" and 
                     p.categoryID = subc.categoryID 
               select p.ProductID;