Re: NULL fields

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#4563

From: Jakob Petersen
Date: Thu, 29 Nov 2001 16:13

36 lines
1958 bytes

Hi,

The Clear() method on the parameter wont work with strings.
Use

 ADOQuery1->Parameters->Items[0]->Value = System::Null

Instead which is the ONLY (XP) solution on ADO parameter clearing problems.

Best Regards,

Jakob Petersen
Microhouse

"mafi" <mafi@multimania.com> skrev i en meddelelse news:3c0281a0_1@dnews...
> Hi !
> I'm using a TADOQuery to insert data into a table with the Parameters from
> another table.
> When I execute the query, if I got a NULL field I got a EOleException that
> says "Parameter object is improperly defined. Inconsistent or incomplete
> information was provided"
>
> My code's like this:
> ADOQuery1->Parameters->Items[0]->Value =
> ADOQuery2->FieldByName("field1")->AsString;
> ...
>
> this : ADOQuery1->Parameters->Items[0]->Value = NULL;
> doesn't work as well, and the paNullable option of the Attributes property
> doesn't change anything.
>
> How can I insert data with NULL value ?
>
> Thanks
>
>

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From: "Jakob Petersen" <Jakob@microhouse.dk>
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Subject: Re: NULL fields
Date: Thu, 29 Nov 2001 17:13:54 +0100
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