Question

how to retrieve a single column’s value of type string using HQL.
I tried the following way but is not working.

    public virtual string GetCityById(int Id)
    {
        using (var session = sessionFactory.OpenSession())
        {
            using (var transaction = session.BeginTransaction())
            {
                var queryString = string.Format("SELECT C.CityName FROM {0} AS C WHERE Id=:Id", typeof(T));
                return session.CreateQuery(queryString).SetInt32("Id", Id).ToString(); <--Also tried with .SetParameter("Id",Id)
            }
        }
    }

Expected Output is:

NEWYORK

Actual Output is:

Select Name FROM FNHHelper.Entites.Cities WHERE Id=:Id

Answer 1

You’re returning the String representation of the query. You just need to execute the query, and return its unique result:

session.CreateQuery(queryString).SetInt32("Id", Id).UniqueResult();

(assuming the method name is the same as in the Java version).