Web Forms :: How To Validate A Gridview Column Based On Another Checkbox Column

Apr 6, 2010

I have a gridview which displays following columns:

TaskID, TaskDescription, IsComplete, DateOfCompletion

Now what I want to achieve is, when user clicks IsComplete checkbox, she must enter the date of completion. So, I want a validation (client side) on DateOfCompletion if the checkbox is selected (checked). And, I also want to use Validator Callout Extender
if possible.

How can I achieve this?

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2)

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