Question

VFP ODBC DRIVER Windows XP - 2nd time around

Asked by: amidonbill

I see an older thread with this title - however the links mentioned are no longer active.

I have been using the VFP ODBC drivers and would like to use the OLE stuff - but I don't know where to start?

Also - I use Crystal Report via the VFP9 ODBC - can I access Crystal with a better interface?

thank
bill

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Asked On
2008-06-08 at 15:11:22ID23467673
Tags

odbc

,

foxpro

,

driver

Topic

FoxPro Database

Participating Experts
2
Points
500
Comments
6

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Answers

 

by: CarlWarnerPosted on 2008-06-08 at 15:52:21ID: 21739911

The older ODBC driver for VFP from MS only truly supports the features and data types as of VFP6.  If you want to access data in a newer version of VFP, you may have no good choice but to go on to the OLE DB Provider for VFP. [There is an ODBC driver from Advantage Server that gets to VFP9 data, but the driver has a limited feature set.]  The OLE DB Provider is treated more like a DSN-less ODBC connection in that no prior setup is required and you just define or recall a previously used connection string.

The OLE DB Provider for VFP is here (dated May 16, 2008):

Microsoft OLE DB Provider for Visual FoxPro (through) 9.0
http://www.microsoft.com/downloads/details.aspx?FamilyID=e1a87d8f-2d58-491f-a0fa-95a3289c5fd4&DisplayLang=en

A connection string sample is here:

OLE DB Provider for Visual FoxPro
http://www.carlprothman.net/Default.aspx?tabid=87#OLEDBProviderForVisualFoxPro

 

by: amidonbillPosted on 2008-06-09 at 06:58:55ID: 21743188

Thanks Carl - that should get me going on the VFP part of it.

Does anyone know a better way of accessing VFP9 data with Crystal 11 than using the VFP ODBC - it has an issue with blank dates.

thanks

 

by: CarlWarnerPosted on 2008-06-09 at 07:45:28ID: 21743559

Since I don't use Crystal Reports, I can only suggest.

Maybe you can conditionally address date fields with a test like

IIF( EMPTY( vfp_date ),NULL,DTOS( vfp_date ) )

or something similar to handle a blank/empty date.

 

by: amidonbillPosted on 2008-06-09 at 08:03:45ID: 21743724

Yes - that is what I do now - when the date is empty the ODBC reports is as 12/30/1899 -

I wish it wouldn't do that .... <s>

 

by: ramromPosted on 2008-06-09 at 08:38:23ID: 21744030

Each field type has an initial value (in the absence of a default value). This value tests "empty".
It is not really empty. That is what NULL is for.
The initial values are:
Number - 0
Logical - .F.
Character - all blank
Date - 12/30/1899
etc.

The "proper" solution is to redefine the date field(s) as DATE NULL DEFAULT NULL.
Only then will a new row have the date field(s) initialized as null.
If you do this to a table with rows  with "empty" dates then
REPLACE datefield WITH null FOR EMPTY(datefield)

 

by: CarlWarnerPosted on 2008-06-09 at 11:56:33ID: 21745624

PRB: Error 3162 Setting FoxPro Date Field to Null
http://support.microsoft.com/kb/168837/en-us

20120131-EE-VQP-002

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