Validation of duplicate data (add and edit)

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example records in my tables (view in gridview)

POSITION         LASTNAME

CHAIRMAN        REYES
MEMBER          LUNA
MEMBER          MARTINEZ

ADD BUTTON
EDIT BUTTON

When I edit the chairman, I can't save it because of the validation, that there must be only one chairman in the field shows it.

How can I save this, that he is still the chairman?

Thanks!

Posted 20-Feb-11 18:59pm

sevengenn

Updated 20-Feb-11 22:01pm

Dalek Dave

v3

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Prerak Patel 21-Feb-11 1:02am

Question is not clear.

[no name] 21-Feb-11 1:16am

Be Speciifc, What is your problem?

sevengenn 21-Feb-11 1:24am

prerak patel && ramaling koushik, sorry guys. I'm having a hard tome explaining my problem. but I tried to improve it. thanks

Ankur^\m/ 21-Feb-11 1:52am

When you say you edit the chairman, are you only editing his name? What validation have you done? Can you show the code?

Dalek Dave 21-Feb-11 4:01am

Edited for Readability.

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Sandeep Mewara · Answer 1 · 2011-02-20T21:11:00

In the validation check you need to include one more condition that if the current record is the previous existing one itslef then ignore.

Generally at DB level, this is handled via a key.
At UI level, you can store the current chairman. When editing and updating, just compare and see if the one editing is of current chairman or not - if so, don't put the duplicate check and just move ahead.

Bottom line, you need to keep track of current chairman and accordingly handle the validation part.