NHibernate proxy causing problems with databinding

Question

I have a gridview that is bound to the result from an nhibernate query. If the first item in the list is edited the following exception is thrown:

System.Refle

Answer 1

Very late, but should help others with the same problem. The solution I used is to wrap a custom list (in this case a NotificationList) around the field in the getter.

private IList _parameters = new List();  
get  
{  
    return new NotificationList(_parameters);  
}

This list is a wrapper around the list, so that databinding will be forwarded to the original list.

public class NotificationList : IList, IList    
{
    IList myList;
    public NotificationList(IList list)
    {
        myList = list;
    }
    int IList.Add(object item)
    {
        myList.Add ((T) item);
    } 
    // implement both IList and IList
    // ...
}

For me this fixed the issue with the databinding, but created a side effect where every time the session was flushed all the items in the collection get updated in the DB, wether they changed or not. To resolve that, I changed the mapping to access the field directly. See this on Hibernate, which applies to NHibernate as well.
This is the new (Fluent) mapping:

HasMany(x => x.Parameters)
       .Cascade.All()
       .Access.CamelCaseField(Prefix.Underscore);