Question

I am having an issue trying to get this statment to work. I am trying to filter a parent set of records based off of a one to many child relationship table. I get an error that I cannot convert lambda expression to delegate type. I would like to stay with a Linq solution if possible.

result = db.ParentTable.Where(r => r.ChildTable.Where(c => c.ChildField == value));

Answer 1

Not sure if I understand what you’re after, but maybe this is it:

db.ParentTable.Where(r => r.ChildTable.Any(c => c.ChildField == value));