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When ever a user changes a particular field in a SharePoint List, Can I force the user to enter another field?

For example, I have got two fields, lets say A and B. When ever a user changes / update the field A can I force the user to update B as well ? (If user changes B no need to force the user to change A).

Looking for some inputs!! Many thanks ...

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Are you able to use javascript/jQuery? –  spevilgenius Nov 16 '11 at 12:31
    
I did not try with that, though thanks for that, will see how can I do it ... –  Jithu Nov 16 '11 at 12:49

1 Answer 1

up vote 1 down vote accepted

Not possible Out-of-box. You can use a javascript to clear the B field. If you need some logic or validation, you have to develop custom fields.

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Most of the time JavaScript will work fine. However, it is worth noting that it is not bulletproof. The only bulletproof method is to write an Event Receiver. –  Kit Menke Nov 16 '11 at 15:41
    
With the question, I understand that he wants user to update field B when field A is updated(by user). If so, event receiver cannot help as it will not change the UI at the time of field change. The only option is to develop custom field control –  Amit Kumawat Nov 16 '11 at 16:01
    
Yes, good point about the UI. The event receiver could only enforce the data. –  Kit Menke Nov 16 '11 at 22:26
    
thank you Amit and Kit for your help on this issue !! however I would like to add one more note that the list is of type Datasheet, here also cn I use JavaScript? –  Jithu Nov 17 '11 at 4:16

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