Question

Can I please have a regular expression in .NET, which will allow only 24 hr time format in the textbox.

Thanks.

Best Regards,
MS

Answer 1

Regular Expressions: Time hh:mm validation 24 hours format:

([0-1]\d|2[0-3]):([0-5]\d)

If you need seconds too:

([0-1]\d|2[0-3]):([0-5]\d)(:([0-5]\d))?

Edit:
To prevent trailing AM/PM, partial match can’t be allowed or you have to put the expression between ^ and $.

^([0-1]\d|2[0-3]):([0-5]\d)(:([0-5]\d))?$