LINQ to SQL and Null strings, how do I use Contains?

Question

Here is the query

from a in this._addresses
where a.Street.Contains(street) || a.StreetAdditional.Contains(streetAdditional)
select a).ToList
(         


        

Answer 1

I would create an extension method to return an empty sequence if null and then call contains method.

public static IEnumerable EmptyIfNull(this IEnumerable pSeq)
{
      return pSeq ?? Enumerable.Empty();
}

from a in this._addresses
where a.Street.Contains(street) || 
      a.StreetAdditional.EmptyIfNull().Contains(streetAdditional)
select a).ToList
()