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Vladimir Stefanovic
Guest
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 Posted: Thu Feb 17, 2005 9:53 pm Post subject: Cannot perform this operation on a closed dataset ?! |
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Hi,
There is a weird thing happened to me today with opening
ADO connections in the most simpliest example I have shown
in my previous post. I made many ADO programs so far and
never had such problem.
For example:
ADOConnection1->Connected = true;
ADOTable1->Open();
ADOTable2->Open();
if ( ADOTable1->Active )
{
ADOTable1->...do something ...
// Cannot perform this operation on a closed dataset ???!!!
}
That means ADOTable1 *is* active but system thinks it's closed!
When 'Active' is set at design-time everything went OK. Why?
Best regards,
Vladimir Stefanovic
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Viatcheslav V. Vassiliev
Guest
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| Posted: Sat Feb 19, 2005 2:36 pm Post subject: Re: Cannot perform this operation on a closed dataset ?! |
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Completely rebuild your project, not just recompile. This could help.
//------------------------------------------
Regards,
Vassiliev V. V.
http://www.managed-vcl.com - using .Net objects in Delphi for Win32 +
ADO.Net
http://www.oledbdirect.com - The fastest way to access MS SQL Server,
MS Jet (Access) and Interbase (through OLEDB)
"Vladimir Stefanovic" <antivari (AT) po (DOT) sbb.co.yu> сообщил/сообщила в новостях
следующее: news:42151246 (AT) newsgroups (DOT) borland.com...
| Quote: | Hi,
There is a weird thing happened to me today with opening
ADO connections in the most simpliest example I have shown
in my previous post. I made many ADO programs so far and
never had such problem.
For example:
ADOConnection1->Connected = true;
ADOTable1->Open();
ADOTable2->Open();
if ( ADOTable1->Active )
{
ADOTable1->...do something ...
// Cannot perform this operation on a closed dataset ???!!!
}
That means ADOTable1 *is* active but system thinks it's closed!
When 'Active' is set at design-time everything went OK. Why?
Best regards,
Vladimir Stefanovic
|
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| Back to top |
|
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Jochen Reichenberg
Guest
|
| Posted: Tue Feb 22, 2005 8:40 am Post subject: Re: Cannot perform this operation on a closed dataset ?! |
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Getting rid of the TADOTable components might solve your problems
AFAIK TADOTable is only for quick and dirty conversions of old applications
that used TTable. It should not be used in new projects.
"Vladimir Stefanovic" <antivari (AT) po (DOT) sbb.co.yu> schrieb im Newsbeitrag
news:42151246 (AT) newsgroups (DOT) borland.com...
| Quote: | Hi,
There is a weird thing happened to me today with opening
ADO connections in the most simpliest example I have shown
in my previous post. I made many ADO programs so far and
never had such problem.
For example:
ADOConnection1->Connected = true;
ADOTable1->Open();
ADOTable2->Open();
if ( ADOTable1->Active )
{
ADOTable1->...do something ...
// Cannot perform this operation on a closed dataset ???!!!
}
That means ADOTable1 *is* active but system thinks it's closed!
When 'Active' is set at design-time everything went OK. Why?
Best regards,
Vladimir Stefanovic
|
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