Hopefully someone can help me out here before I spend a lot of time doing something impossible.

Let's say I have a property in my object that's a datetime, and I want to make it nullable, ie:

private DateTime? m_EstimatedEndDate;

public virtual DateTime? EstimatedEndDate
{
get
{
return m_EstimatedEndDate;
}
set
{
m_EstimatedEndDate = value;
}
}

<property name="EstimatedEndDate" type="DateTime">
<column name="EstimatedEndDate" length="8"
sqlt-type="datetime"
not-null="false"/>
</property>


The problem is, when I set it up like this, and load the object, and say bind it to a grid, ie:

IList someList = session.CreateCriteria(typeof(MyClass)).SetMaxResults(100).List();
ListGrid.DataSource = someList;
ListGrid.DataBind();

...the EstimatedEndDate field disappears altogether. No errors...just gone. Poof. I've also tried changing the type in the mapping file to DateTime?...same results.

Anyone? The latest comments in JIRA seem to indicate this should be working. Am I doing something wrong? Thanks very much in advance...

Is it not a grid characteristic?

The bug is with MS's GridView. :)

Hi... could you please explain how you found out that it is a bug in the GridView? (just curious)

With 1.2-alpha1, I would typically map it like this:

and NHibernate will figure out that it is nullable via reflection. I have been trying to find a way to explicitly tells NHibernate that the property is a DateTime?, but I am have not been able to find the proper value to use in the type="" attribute yet.

Does not work? The question mark syntax is just syntactic sugar for producing a Nullable<> under the covers. of course I've never tried specifying generic types in NHibernate, so not even sure if that's supported.

You can specify type="DateTime".