ROW_NUMBER() and nhibernate - finding an item's page

Question

given a query in the form of an ICriteria object, I would like to use NHibernate (by means of a projection?) to find an element\'s order, in a manner equivalent to using

Answer 1

After trying to find an NHibernate based solution for this myself, I ultimately just added a column to the view I happened to be using:

CREATE VIEW vw_paged AS
SELECT ROW_NUMBER() OVER (ORDER BY Id) AS [Row], p.column1, p.column2
FROM paged_table p

This doesn't really help if you need complex sorting options, but it does work for simple cases.

A Criteria query, of course, would look something like this:

    public static IList GetRange(string search, int rows)
    {
        var match = DbSession.Current.CreateCriteria()
            .Add(Restrictions.Like("Id", search + '%'))
            .AddOrder(Order.Asc("Id"))
            .SetMaxResults(1)
            .UniqueResult();

        if (match == null)
            return new List();
        if (rows == 1)
            return new List {match};

        return DbSession.Current.CreateCriteria()
            .Add(Restrictions.Like("Id", search + '%'))
            .Add(Restrictions.Ge("Row", match.Row))
            .AddOrder(Order.Asc("Id"))
            .SetMaxResults(rows)
            .List();
    }