duplicate data

Hey I have work with c# and Sql server for awhile but never had to build anything from start-up. I created a database with basic stored procedure. insert, update, and delete basic stuff.

I have a problem with duplicate records.
I have two tables tb1 and tb2 in these tables are the system number and project name. Every web form has two drop down list that is populate with this data. tb1 = project names and tb2 = system numbers.

When they click the save button the data is save but, tb1 has a new entry with duplicate project name and tb2 has a duplicate with system name each receives a new pk number.

I tried validation check if exist get error can't modified existing pk.
or doesn't save.

I have pk and fk on each table connected to tb1 and tb2.

any help any one can give is appreciated.

If I can get example code a link to reference(any thing) :confused

ok.. here we go.

 pid int indentity (1,1) pk

 sid int indentity (1,1) pk
 pid int fk

 cid int indentity (1,1) pk
 pid int fk
 sid int fk
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asked Sep 01, 2010 at 07:50 AM in Default

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Probably you have problem in the insert(update) stored procedures. Post the code of them here. Also Let us know which one are called when you press the save button.

Sep 01, 2010 at 08:53 AM Pavel Pawlowski
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2 answers: sort voted first

Your problem is caused by the fact that your procedure needlessly tries to insert new project record in tb1 and new system record in tb2. This action is not needed at all as these tables are your catalogs, your users don't need to insert new records in these. Your webforms have 2 dropdowns which are populated with

  • project name (as display property) and perhaps pid as value property of the dropdown values

  • system number information which is dependent on the project.

When you save data, you only need to insert tb3, that is all. You get pid from the value of the selected item of the first dropdown, and sid from the value of the selected item of the second dropdown.

Hope this helps,


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answered Sep 01, 2010 at 08:50 AM

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Thanks figure out my problem. It was a c# code problem I was actually having the drop down list connected to the project name instead to the pid and displaying the name. stop my duplicate insert.


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answered Sep 10, 2010 at 12:33 PM

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@postonoh, if Oleg resolved this for you, please mark his answer as the accepted one. The button is on the left side of the page at the top of his post.

Sep 10, 2010 at 12:57 PM Mark
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asked: Sep 01, 2010 at 07:50 AM

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Last Updated: Sep 02, 2010 at 12:49 AM

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