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BOOK: Beginning VB.NET 2nd Edition/Beginning VB.NET 2003
This is the forum to discuss the Wrox book Professional VB.NET 2003 by Bill Evjen, Billy Hollis, Rockford Lhotka, Tim McCarthy, Jonathan Pinnock, Rama Ramachandran, Bill Sheldon; ISBN: 9780764559921
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Old April 7th, 2004, 10:31 AM
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Default VB.NET - oledbcommand.parameters BUG

in the book VB.NET of M.Reynolds, R.Blair, J.Crossland, T.Willis there's probably a "bug" about how to set parameters in a OleDbCommand.CommandText property.

vb doesn't care about the parameter name but just about the sequence of the paramenter array. the sample code works fine, but it's a lucky case.

Book's code:
myCommand.CommandText = "INSERT INTO authors (au_id, au_lname, au_fname, contract) " & _
myCommand.Parameters.Add("@au_id", txtAuId.Text)
myCommand.Parameters.Add("@au_lname", txtLastName.Text)

But if you try to exchange parameters,
myCommand.Parameters.Add("@au_lname", txtLastName.Text)
myCommand.Parameters.Add("@au_id", txtAuId.Text)

the database field are filled wrong, with the exchanged fields!

I have VS.NET Pro 2003 italian Service Packed and I think that it's a vb bug not reported in the book.

Am I wrong?
any suggestion?
Thanks you mouch!

(the book is very good I like it much) :)


Alessandro Bernardi
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Old October 9th, 2004, 05:56 AM
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Parameters need to be added to the Parameters collection in the order in which they are defined in either your in-line SQL statements or the stored procedure that you are using.


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