Where to ask- running Excel from .NET?

  • Thread starter Thread starter JustMe
  • Start date Start date
J

JustMe

Hi all,

I have been over at the MSDN forums and someone pointed me here.

I am trying to create an instance of Excel from within .NET so I can
populate it with some data and save it. All works fine. However, after I
tell excel to quit (which it appears to do), if I go into task manager, I can
see it is still running. And if I do the process again, I get 2 copies of
Excel in task manager. This is with Excel 2007 and Win XP.

I have tried a bunch of things, none of which have worked.

One possibility is that I work in at a defense contractor and it might be
that they have some policy or other behind the scene add on that might be
keeping Excel from exiting properly.

Anyway, I am hoping that there is a forum here where someone might have some
ideas as to what might be keeping Excel from completely closing as it should.
If so, could you point me in the correct direction?

Yes, I can provide much more details once I find the appropriate place to
discuss it.

Thank you,

JustMe
 
I'm not sure if this is still a problem under NET, but under native
COM, Excel would remain running if there was any reference to it that
was not specifically set to Nothing (VB, null in C++). Try tearing
down any reference type variables to Nothing and see if this helps.

Cordially,
Chip Pearson
Microsoft Most Valuable Professional,
Excel, 1998 - 2010
Pearson Software Consulting, LLC
www.cpearson.com
 
The difficulty of releasing Excel in .Net seems to crop up regularly (not
that I know much about it!)

See
System.Runtime.InteropServices.Marshal.ReleaseComObject
and
GC.Collect()
in this article
http://support.microsoft.com/kb/317109

Typically ReleaseComObject is wrapped up in a function, plenty of examples
'out there'

Regards,
Peter T

PS I like the conspiracy theory though!
 
Chip,

It is and I have a bunch of code to prevent it. But, so far, it's not
solving the problem. Would this be the right forum to expound on the problem?

Thanks,

JustMe
 
Peter,

Yes, looked there, tried that. Didn't fix it.

My guess is that there is a policy enforced (this is a high security
facility) that might be adding an additional thread to Excel. Something that
works fine with excel normally, but is conflicting with Excel when used via
COM.

Would this be the right forum to expand on the issue or is there a better
forum to do so?

Thanks,

JustMe
 
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