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NHibernate Version 1.2.0 Alpha


HI,

I am new to NHibernate (as well as .net) but I've managed to get the stuff working. I can extract and persist data. I am using Set to map one-to-many relations. But when using it in the application, I want to be able to convert ISet to IList.

Is there any way to do this?

Also, How to use Attributes to map (thus avoiding hbm.xml files) in NHibernate. Please point me to any articles if possible.

Many thanks,

Sath

As far as I know the ISet collection implements the following interfaces:

- ICloneable
- ICollection
- IEnumerable

This means you won't be able to cast it to an IList.

Hi Sath,

About your first question:

First I would recomend that you analyze first if the most correct mapping for your collection would be a List instead of a Set.

If the mapping really is a Set a solution (usefull for databinding) could be:



This method initializes a new list with the elements in the set (it copies all elements) (if you need to databind your set this could be an option):



Hope this helps.

Hector Cruz

Hi,

Thanks for your reply, but the code does not work. It won't convert. Error: Best overload method for List<T> (int). Cannot cast Iesis... ... set to int.

If you are aware of a solution, please do share.

regards,

Sath

Instead of a set, is it possible to use a bag? Then you can use the IList from the back-end all the way through.

Otherwise, try this.. haven't tested, but it's what the Intellisense gives as an option:



List<T> wants an empty constructor, an initial size (int constructor) or a collection that supports IEnumerable<T>. The set should do that. (I think ISet<T> supports IEnumerable<T>).

So, cast your set to an enumerable and see if it works...