June 2001
Intermediate to advanced
620 pages
19h 29m
English
Content preview from ADO: ActiveX Data ObjectsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Name
Parameter.Direction Property — (Versions 2.0, 2.1, 2.5, 2.6)
Synopsis
parameter.Direction = ParameterDirectionEnum
The Direction property specifies whether the current parameter is an input parameter, an output parameter, both an input and an output parameter, or a return value from a stored procedure.
Datatype
ParameterDirectionEnum (Long)
Description
The Direction property is both read- and write-enabled. It is to your advantage to add parameters manually to a Parameters collection so that ADO does not have to make additional calls to the data provider to locate this information itself. In some cases, you must specify the Direction property manually because the particular data provider may not be able to determine this information itself.
The Direction property may be set to one of the ParameterDirectionEnum enumerations listed in Appendix E.
Note
Not all providers can determine the value of the Direction property; therefore, for such providers the application must manually set the value of the Direction property for parameters before they are used.
See Also
ParameterDirectionEnum Enumeration
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.