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16

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1
+1  Q: 

Linq2nHibernate in business layer?

I would like to know, wheter it is a good idea and doesn't breaks n-tiered pattern, if I make the DAL return IQueryable - Collections and then use Linq in the BLL to do my queries? What is about n-tiered then? Does that mean, that all my entities are fetched from databased an then queried in memory?... that would be awesome...

A: 

It depends on your UnitOfWork implementation. Use Nhibernate LINQ, and make sure the Session is not closed every time you do a LINQ operation on the IQueryable that is returned from your DAL.

mxmissile  2010-07-20 22:38:58

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