Question

How to do a case-insensitive where in NHibernate Linq query?

e.g.

//note this one doesn't work if the entry in database has lowercase
q => q.Where(entity => 
    entity.CaseInsensitiveField == DesiredField.Trim().ToUpper())

Answer 1

Try this:

q => q.Where(entity => entity.CaseInsensitiveField.ToUpper() == DesiredField.Trim().ToUpper())

Also, I would suggest to set the parameter outside the query:

var value = DesiredField.Trim().ToUpper();

...

q => q.Where(entity => entity.CaseInsensitiveField.ToUpper() == value)