How to use flags enums in Linq to Entities queries?

Question

I have a [Flags] enum like this:

[Flags]
public enum Status
{
  None = 0,
  Active = 1,
  Inactive = 2,
  Unknown = 4
}

A Status enum may c

Answer 1

I am unsure if a bitwise AND-operation will work, but try casting s to an int:

        int i = (int)s;
        var result = from r in db.Records
             select r
             where (r.Status & i) == r.Status

Which database engine are you using? Possibly the engine does not support bitwise operations.

Reference: http://www.matthidinger.com/archive/2008/02/26/entity-framework-comparison-frustration-explained.aspx

Answer 2

var result = from r in db.Records
             where r.Status == s
             select r