Container does not open

Question

hello,I have a question.
I am building a tool by Visual C++.net 2003.
When I wrote the source just like sample code,
the query went well.
now I just changed that into methods of class.
then, other things for example putDocument, etc, went well,
but I always fail to query.
I always meet this error message:Cannot query in container
dbxml:/~~~~/Container.dbxml. Container not open and auto-open is not enabled.
However, I set even the flag "DBXML_ALLOW_AUTO_OPEN"and "DBXML_ALLOW_EXTERNAL_ACCESS".
and the container always well opened, of course.
the Query is like this:
for $b in collection("/XMLs/BDBEnv/Container.dbxml")
where $b//~~~
return $b//~~~
should I do any other thing except setting flag or opening the container?
I will very appriciate if I can get any help or advise.
thank you,and regards,
Lee

Answer 1

Hi Lee,
In order to query efficiently, you should if possible open all containers before you query them. You will need to hold a reference to the container at least until after the query has been prepared.
John