Level Extreme platform
Subscription
Corporate profile
Products & Services
Support
Legal
Français
Detecting when user exits a VFP .exe improperly
Message
From
25/11/1996 14:56:39
 
 
To
25/11/1996 13:54:58
General information
Forum:
Visual FoxPro
Category:
Other
Miscellaneous
Thread ID:
00013353
Message ID:
00013433
Views:
31
>>I need some way to find out when a network (esp. Win95, NetBeui) user of my VFP .exe dose not exit properly (power-outage, GP fault, etc.) so that I know the next time another user logs on to "clean-up the tables" (pack/reindex/append to new structure).
>>
>>Anybody got any ideas? Note: you can't rely on the lock status of a record because a Win95 "server", as opposed to NT, does not automatically dissconnet a user/client with open files when that user crashes.
>
>Create a log table with 3 fields: UserID, LogIn(DateTimeStamp),
>LogOut(DateTimeStamp). When the user logs in, open the table and detect
>if it's a known user or the one that already used the system at least
>once. If the user is new, - append blank and store his UserID and LogIn
>dateTime stamp. If the user has used the system, - clear his LogOut field
>and store current dateTime stamp. After that close the table. On exit
>of any user fill in their LogOut field. In this situation if any record
>doesn't have a LogOut stamp you know for sure that they didn't exit
>properly. There will be very little concern over this log table and the
>logging function to be for multi-user environment because you will open
>it only for a split of a second and there will be a slim chance that
>more than one user will be attempting to open it at the same time. If you
>really want to know what files were open at the time of crash you can
>expand the structure of this logging mechanism and create one or more
>tables that will hold the file names with the DateTimeStamp as an index
>field. Every time the user goes to any module you log his LogIn value
>into that table(-s), and on exit you delete the corresponding records.
>It worked perfectly for the local University master scheduling program,
>and I was also logging all their actions performed on the data so that
>there was a complete set of information (including time spent in each
>table) for user activities. ...And it's also fun to write :)

How do you detect if the user is still in the system or just logged out improperly?
Craig Berntson
MCSD, Microsoft .Net MVP, Grape City Community Influencer
Previous
Next
Reply
Map
View

Click here to load this message in the networking platform