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

You must check first if StreetAdditional is null.

Try

where a.Street.Contains(street) || ((a != null) && a.StreetAdditional.Contains(streetAdditional))

This works because && is a shortcut-operator and if a != null yields false, the second expression with the null-value won't be evaluated since the result will be false anyway.