多列查询 - Nhibernate 使用 QueryOver

Question

I'm using NHibernate with oracle db and I want to make a query that selects many columns. For example, lets say I have a table named Soldiers with the following columns :

Id, first name and last name.

I want to select and return the first name and last name of all the soldiers, so in sql it will be like this: SELECT FIRSTNAME, LASTNAME FROM SOLDIERS;

How do I do it in code using QueryOver?

Answer 1

To use QueryOver , there must be mapped class Soldier . That is a must . But then it is easy to use QueryOver to get FirstName and LastName of all:

Soldier soldier = null;
var list = session
    .QueryOver<Soldier>(() => soldier)
    .SelectList(l => l
        .Select(x => x.LastName).WithAlias(() => soldier.LastName)
        .Select(x => x.FirstName).WithAlias(() => soldier.FirstName)
    )
    .TransformUsing(Transformers.AliasToBean<Soldier>())
    // .Take(10) just 10
    .List<Soldier>();

Assert.IsTrue(list.First().FirstName != null);
Assert.IsTrue(list.First().LastName != null);