Question

I have some SQL that does an order by case statement. It works fine. I can’t replicate it as Linq2Sql.

Here’s a quick hacked up version of the SQL i made, simplified and really dumbed down. Please ignore what the sql is trying to do (business logic wise) as i made this up, for the question.

SELECT           u.Id,     u.Name FROM Users u ORDER BY CASE              WHEN u.Name IS NULL THEN 1             WHEN LEN(u.Name) < 3 THEN 2             WHEN LEN(u.Name) < 10 THEN 3             WHEN LEN(u.Name) < 5555 THEN 4             ELSE 5         END ASC 

When i try this in some Linq2Sql .. i get an anonymous error.

Here is the Linq2Sql code :_

from u in db.User orderby new {             UserNameType = (u.Name == null ? 1 :                             u.Name.Length < 3 ? 2 :                             u.Name.Length < 10 ? 3 :                             u.Name.Length < 5555 ? 4 :                             5)              } select u; 

Any help how i can order by a case statement?

Answer 1

Don’t construct an anonymous type, just do your conditional directly on your object.

orderby (u.Name == null ? 1 :          u.Name.Length < 3 ? 2 :          u.Name.Length < 10 ? 3 :          u.Name.Length < 5555 ? 4 :          5)