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I have the following regular expression but I want the text box to allow the dash character
^[0-9a-zA-Z \/_?:.,\s]+$ Anyone know how I can do this?
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The quantifier notations In regular expressions, the hyphen ("-") notation has special meaning; it indicates a range that would match any number from 0 to 9. As a result, you must escape the "-" character with a forward slash ("\") when matching the literal hyphens in a social security number.
Literal Characters and Sequences For instance, you might need to search for a dollar sign ("$") as part of a price list, or in a computer program as part of a variable name. Since the dollar sign is a metacharacter which means "end of line" in regex, you must escape it with a backslash to use it literally.
Inside character class - denotes range. e.g. 0-9 . If you want to include - , write it in beginning or ending of character class like [-0-9] or [0-9-] . You also don't need to escape .
This answer is not useful. Show activity on this post. [] denotes a character class. () denotes a capturing group. [a-z0-9] -- One character that is in the range of a-z OR 0-9.
The dash needs to be the first/last character in the character class in order to be used literally:
^[-0-9a-zA-Z \/_?:.,\s]+$ ^[0-9a-zA-Z \/_?:.,\s-]+$ You could also escape it, if not the first/last:
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