system variables via Objectdbx

Hi
I just wanted to confirm if it is not possible to set or get sysvars - even
ones stored in dwg file - via object dbx.(for example "ProjectName")
I was surprised not to find anything on this through google, probably just
didnt' find the right search terms, but "dbx" "system" "variable" didnt'
yield much.
But through experimentation, i get an error if i try to access a dbx
document method .GetSystemVariable or SetSystemVariable
My hypothesis is that it seems only the active doc can use those methods and
since the dbx cant be active, it cant access it's own variables - even
though they are stored in the document itself.
I was able to set and get with no problems if i open the doc in the editor,
but cant seem to with dbx.
Am I missing something simple? or is this really the case?
Somehow it seems strange if the variable is stored in the dwg that there
would be no property or method available to access it even through dbx but
if there is I haven't found it yet.
Thanks for any info.
I couldn't find anything on this in the help either, but again maybe I'm not
searching on the right terms to get a hit - the obvious ones don't seem to
be turning up any entries
Mark

 

Mark, that function does not work in dbx.
It's not because it only works on the active document
it's because the function can also read vars outside the dwg.

 

Since GetVariable and SetVariable are methods of AcadDocument,
they only work on AcadDocuments (they're just wrappers for
the ObjectARX counterpart of the (getvar) and (setvar) LISP
functions). So there's no method for getting/setting system
variables stored in drawings that are accessed directly via
ObjectDBX.

The AcadXDatabase class in AcadX provides a means to get
system variables from drawings accessed via ObjectDBX.
It only retrieves system variables that are stored in the
dwg file (since that's all that makes sense). I never got
around to a SetVariable method, because I never needed it,
and it is a lot of work.

 

Thanks for the confirmation,
In this case I just wanted to auto set the ProjectName on several folders
and their subfolders.
Its easy enough to just open the dwgs in a loop as go the dbx route, just
wanted to confirm that I wasn't just 'not' seeing it. I know that's a
double negative but it still seems the right way to say it!?!

The obvious downside of having to open in the editor to do whatever..is
tying up the 'hosting' application - the session of acad from which the call
to the routine was made. (assuming vba)
But it seems that's the case with dbx as well, If i start a dbx loop, it
still seems to capture acad's attention and I can print messages to command
line or such but I haven't figured a way to make a loop "run in the
background" - such that the user could go back to editing the current
drawing while the loop is doing it's thing....
I guess that should be a whole different thread.
Thanks again for the info, Tony
Mark

 

Thats how it seemed, thanks for the confirmation.

That makes sense, since I have no idea what getvar or setvar are really
doing I originally thought dbx could generally read whatever info was in
there. I see it's not the case.
Thanks
Mark

 

Mark, don't know if it helps in your case (vba), but you could try and
create a new acad session and do the loop there.
Once finished, just close the session.
But of course, it could get messy doing that from VBA.