Question

Simple LINQ query:

from transport in db.Transports  select new  {     Current = transport.CurrentLocation,     CurrentCarriers = transport.CurrentLocation.Carriers,   }; 

Problem: CurrentLocation may be null. If it is, executing this query throws a NullReference. I tried adding a check like

transport.CurrentLocation == null ? null : transport.CurrentLocation.Carriers 

but Linq to sql does not seem to be able to parse that.

Any nice solutions that do not involve sending an extra query for each transport?

Answer 1

I normally just use ‘let’.

from x in Foo let y = x.Bar where y != null select y.Baz; 

UPDATE:

I think the ?? operator does translate to SQL.