Question

I need to select an integer value from a table:

int id = from s db.Table
         where s.Id == someParameter
         select s.intValueOfInterest;

That doesn’t work. I tried this but it looks really ugly:

int id = int.Parse((from s db.Table
         where s.Id == someParameter
         select s.intValueOfInterest).ToString());

What would be the best way to do that? Thanks.

Answer 1

Use

int id = (from s in db.Table         
         where s.Id == someParameter         
         select s.intValueOfInterest).First().Value;

if intValueOfInterest is nullable, or

int id = (from s in db.Table         
         where s.Id == someParameter         
         select s.intValueOfInterest).First();

if it’s not.

Linq is assuming that there could be more than one result (even though you’re querying against the Primary Key), so we use .First() to return a single element, and the .Value deals with a null (actually, it’ll fail if it is null).