Is there an implementation of IQueryable over DbDataReader?

Question

I have a lot of existing code which uses raw ADO.NET (DbConnection, DbDataReader, etc). I would like to transition to using LINQ to SQL for new code, but for now put both t

Answer 1

I can't see any benefit in implement IQueryable<T> - that suggests more functionality than is actually available - however, you could implement it as an IEnumerable<T> easily enough, with the caveat that it is once-only. An iterator block would be a reasonable choice:

    public static IEnumerable<IDataRecord> AsEnumerable(
        this IDataReader reader)
    {
        while (reader.Read())
        {
            yield return reader; // a bit dangerous
        }
    }

The "a bit dangerous" is because the caller could cast it back and abuse it...