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CommandBuilder vs Stored Proc for updating
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26/01/2010 21:26:39
 
 
Information générale
Forum:
ASP.NET
Catégorie:
ADO.NET
Versions des environnements
Environment:
C# 2.0
Divers
Thread ID:
01445437
Message ID:
01446100
Vues:
42
>Thank you for your reply. I don't know what "named parameters" and "positional parameters" are and how I (as a developer) have control over these. I will have to find something to read on that.

You, as a developer, have control over how you set up your Stored Procs, so you'd need to have the Stored Proc's parameters in the order that the columns are specified in your DataSets, if you are using a database that only supports positional parameters (meaning, they *have* to be in a certain order, like I think VFP requires this ... not sure about VFP actually, so don't quote me on that <g>)

If a database uses "positional parameters", then your Commands look like this (typically uses "?"):
insert into MyTable (MyColumn1, MyColumn2) values (?, ?)
whereas "named parameters" (like with SQLServer) would look like this:
insert into MyTable (MyColumn1, MyColumn2) values (@MyColumn1, @MyColumn2)
~~Bonnie


>
>>Hi Dmitry,
>>
>>>Coming back to your suggestion on how to write a stored procedure for updating database, I was wondering if you could, please, clarify something. In your blog III you have a method SetAllParameters() that iterates through columns of the table. How do you make sure that the order of parameters in the stored procedure match the order of parameters sent when executing stored procedure from DAL?
>>
>>SqlServer uses named parameters, not positional, so for SQL it doesn't matter what order they're created. For databases where positional parameters are used, then you're just going to have be careful. <g>
>>
>>~~Bonnie
Bonnie Berent DeWitt
NET/C# MVP since 2003

http://geek-goddess-bonnie.blogspot.com
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