how to use Custom Validator to valid the date input, such as Feb does not have 30th or April does not have 31st....
I don't want to use Calender control...
If you don't "have" to use the custom validator, then why not use a compare
validator? Set the Operator property of the validator to "DataTypeCheck",
and the Type property to "Date".
It's pretty smart too, I just tested it out and it validated (even on client
side), leap years, and everything you mentioned in your post.
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