Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Auto Increment primary key issue

Posted on 2006-06-28
1
Medium Priority
?
240 Views
Last Modified: 2010-04-23
Hi,
I have a sql server database, and for a primary key I use an auto incrementing integer field.  In my code I create a new row like this...

Dim rowNewRow As DataRow
rowNewRow = Me.DsTheDataSet.TheTable.NewRow
rowNewRow.Item("Field1") = "something"
Me.DsTheDataSet.TheTable.Rows.Add(rowNewRow)

That works fine, but the primary key created for the new row isn't the real key, it's just an auto increment starting from 1.  Once the data is save the primary key updates to the real one.  The thing is I want to be able to use the primary key value before saving the dataset.  Is this possible?

Thanks a lot
0
Comment
Question by:hmcnasty
1 Comment
 
LVL 17

Accepted Solution

by:
ZeonFlash earned 2000 total points
ID: 17001787
I can see several possiblities, but none of which are very safe.  First, you can use IDENT_CURRENT('tablename') to get the current identity value...so IDENT_CURRENT('tablename') + IncrementValue [usually 1] would be the NEXT primary key that will be inserted.  You can use this knowledge in tandem with your row creation, but it's a very very very bad idea if someone else could be adding rows at the same time, in which case you would end up with spurious records.

Another method would be to write a stored procedure that inserts your new row and returns the PK.  After you get the PK, you can assign it to the row in the dataset and go about your business.
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: jpaulino
XML Literals are a great way to handle XML files and the community doesn’t use it as much as it should.  An XML Literal is like a String (http://msdn.microsoft.com/en-us/library/system.string.aspx) Literal, only instead of starting and ending with w…
Introduction As chip makers focus on adding processor cores over increasing clock speed, developers need to utilize the features of modern CPUs.  One of the ways we can do this is by implementing parallel algorithms in our software.   One recent…
Video by: ITPro.TV
In this episode Don builds upon the troubleshooting techniques by demonstrating how to properly monitor a vSphere deployment to detect problems before they occur. He begins the show using tools found within the vSphere suite as ends the show demonst…
Loops Section Overview
Suggested Courses

916 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question