Hi All,

LegalPerson has 2 subclasses: Person & Organization. I've problem retrieving the objects. Linking to LegalPersonAlias with one-to-many relationship.

Similar structure of the following code didn't have problem if the class, LegalPerson, have no subclasses. But now it has the 2 sub-classes and have the problem appeared;

my HQL is like this "from LegalPerson lp, LegalPersonAlias lpa where lpa.origLegalPerson = lp";

On running the code below, it hits error as soon as (even before my if-checkings) running the line: " Object[] objs = (Object[])ie.Current;"

The error is:
"Unable to cast object of type 'RHU.RAIS.Business.Person' to type 'System.Object[]'."



How should I cast the objects to its respective (sub-)class?


portion of the code:
...
for (IEnumerator ie = q.List().GetEnumerator(); ie.MoveNext(); )
{

Object[] objs = (Object[])ie.Current;
LegalPerson lp = (LegalPerson)objs[0];

if (objs[0] is Person)
{
lp = objs[0] as Person;
}
else
{
if (objs[0] is Organization)
{
lp = objs[0] as Organization;
}
else
{
if (objs[0] is LegalPerson)
{
lp = objs[0] as LegalPerson;
}
}
}

...........

Thanks!

Why do You think that the ie.Current should be array/list instead of single value?
Try to replace

Object[] objs = (Object[])ie.Current;
LegalPerson lp = (LegalPerson)objs[0];
with
LegalPerson lp = (LegalPerson)ie.Current;

Gert

Thanks Gert,


However, my HQL is like this "from LegalPerson lp, LegalPersonAlias lpa where lpa.origLegalPerson = lp";

So, beides the LegalPerson object, I have the LegalPersonAlias object.

Then how can I get corresponding values from ie.Current?

thanks!

Sorry, I overlooked that HQL somhow. And I do not know the answer :(

Gert

Hi,

Apologize to all. As I don't see the problem now after much efforts to find out what went wrong.

Final answer is : nothing wrong. My original code works! Something wrong with my PC. Only find that the program runs with no error after rebooting few times.

Sorry.