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Can you tell me if there anybody has implemented a custom validator for checking that one of two (or N) input fields are filled?
'Insert phone number or email address' I’m using ASP.NET (Ajax) 3.5, the ajaxToolkit:ValidatorCalloutExtender (and jQuery if it’s necessary).
Oh, sure, about 10 minutes later I found this Code Project article Multiple Fields Validator – An ASP.NET Validation Control by Adam Tibi by myself: