Need help with ICriteria interface within NHibernate (C#)

[moorcroft]

Hi, I'm pretty new to the NHibernate framework and am trying to use it to query my database. I have a lookup table set up (image.hbm.xml) with the properties set out as follows:

    <property name="ForeignLink" column="FORNBLG" />
    <property name="IncludeInMerge" column="INCLUDE_IN_MERGE" />
    <property name="ReferenceNumber" column="REF_NO" type="AnsiString"/>
    <property name="FileName" column="FILENAME" type="AnsiString"/>
    <property name="Notes" column="NOTES" type="AnsiString"/>

I then also have a class set up representing the lookup table (image.cs), and the name of the table in the database is IMAGE.

OK, now what I am doing is passing a string into a web service for example "2523-ATTACHMENT-57925", and the web service parses the number at the end of this string as an Integer which represents the primary key of the IMAGE table (field name LINK). I need to use this primary key as my search criteria and return the value from the field NOTES and return it as a string.

I have the following code set up and am not too sure how to continue with it to return the string..

using (ISession session = mSessionFactory.OpenSession())
                    {
                        try
                        {
                            if (myString.IndexOf("-ATTACHMENT-") >= 0)
                            {
                                //get primary key from myString (number after -ATTACHMENT-)
                                int pk = int.Parse(myString.Substring((myString.IndexOf("-ATTACHMENT-") + 12)));
 
                                ICriteria criteria = session.CreateCriteria(typeof(Image));
                                criteria.Add(new EqExpression("Link", pk, true));
                                Image image = (Image)criteria.UniqueResult();
                               return ..............
 
etc...
                            }

[moorcroft]

I've just realised it's easier than I thought, simply now have to say:

return image.Notes

:D

[Frinavale]

I'm glad that you were able to solve your problem.
Thanks for sharing your solution, it'll probably help others facing the same problem :)

Just a note though: NHibernate is not native to the .NET environment. It is free as open source software that is mainly used to map .NET classes to database tables (from what I understand).

Because it's not part of the .NET Framework (it's open source software developed a third party), you will probably not be able to find help for it here in the .NET forum....unless you're lucky and another member has used it before.

-Frinny