Allow - (dash) in regular expression

asp.net regex

The dash needs to be the first/last character in the character class in order to be used literally:

^[-0-9a-zA-Z \/_?:.,\s]+$^[0-9a-zA-Z \/_?:.,\s-]+$

You could also escape it, if not the first/last:

^[0-9a-zA-Z\- \/_?:.,\s]+$

asp.net regex

Simple answer, user \- in character class.

^[0-9a-zA-Z\- \/_?:.,\s]+$

asp.net regex

Escape it with \ like:

^[\-0-9a-zA-Z \/_?:.,\s]+$

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