Question

I have this fairly simple SQL query :

SELECT i.IdItem
FROM Item i
INNER JOIN Size s ON i.IdItem = s.IdItem
WHERE s.Width > 0 AND s.Width < 100

… which I’ve been trying to translate to LINQ to entities, to no avail.

So far this is what I came up with :

context.Items.Where(i => i.Sizes.Where(s => s.Width > 0 && s.Width < 100))

I have a DbSet in my DatabaseContext (context) for both Items and Sizes, my Item entity has a Sizes navigation property.

This doesn’t compile, giving me a Cannot implicitly convert type 'System.Collections.Generic.IEnumerable' to 'bool' error. I have a feeling I’m missing something really obvious here.

Answer 1

context.Items.Where(i => i.Sizes.Any(s => s.Width > 0 && s.Width < 100))

Where gives you an IEnumerable which cannot be used as a condition