Dropdowns behaving differently on different systems.

[bingomanatee]

I have developed what amounts to a fancy shopping cart wizard for a
scientific instrument using VB.NET. We are having some disturbing
phenomena relating to dropdown controls.

On my system and other XP based systems I can repopulate the dropdowns
just fine, to reflect different system configurations. However one of
our engineers is runnign Windows 2000 and he has noticed that the
dropdowns are showing several blank lines. They are behaving properly
within the program but he is "selecting blindly" from these lists as
they are blank.

As my code reacts to the selectedIndex of the dropdown, not the
selected item's text, I don't really know whether this is a display
issue only, or a display and data issue. None of the other users have
observed this bug but we are intending to distribute this program to a
broad audience and I'd love to hear if anyone else has seen anything
like this before.

Thanks, Dave.edelhart %a%t% varianinc %d%o%t% com

 

[Guest]

Dave,

Any chance the user with the problem is running McAfee VirusScan Enterprise
8.0i?

If so, this is a known problem and there is a fix on McAfee's web site.

Kerry Moorman

 

[Herfried K. Wagner [MVP]]

On my system and other XP based systems I can repopulate the dropdowns
just fine, to reflect different system configurations. However one of
our engineers is runnign Windows 2000 and he has noticed that the
dropdowns are showing several blank lines. They are behaving properly
within the program but he is "selecting blindly" from these lists as
they are blank.

Maybe the problem is caused by an unpatched virus scanner. These symptoms
are typically caused by a McAfee VirusScan problem that NAI is aware of and
that can be fixed by installing a patch:

Patch 5 for McAfee VirusScan Enterprise 8.0i
<URL:https://knowledgemap.nai.com/phpclient/viewKDoc.aspx?url=kb/kb_kb38717.xml&docType=DOC_KnowledgeBase>