A quick search for currency regex brings up a lot of results.
The problem I have in choosing one is that regex is difficult to verify without testing all the edge cases. Does anyone have a regex for U.S. currency that has been thoroughly tested?
My only requirement is that the matched string is U.S. currency and parses to System.Decimal:
[ws][sign][digits,]digits[.fractional-digits][ws] Elements in square brackets ([ and ]) are optional. The following table describes each element. ELEMENT DESCRIPTION ws Optional white space. sign An optional sign. digits A sequence of digits ranging from 0 to 9. , A culture-specific thousands separator symbol. . A culture-specific decimal point symbol. fractional-digits A sequence of digits ranging from 0 to 9.
here's some stuff from the makers of Regex Buddy. These came from the library so i'm confident they have been thoroughly tested.
Number: Currency amount (cents mandatory) Optional thousands separators; mandatory two-digit fraction
Match; JGsoft:
^[+-]?[0-9]{1,3}(?:,?[0-9]{3})*\.[0-9]{2}$
Number: Currency amount (cents optional) Optional thousands separators; optional two-digit fraction
Match; JGsoft:
^[+-]?[0-9]{1,3}(?:,?[0-9]{3})*(?:\.[0-9]{2})?$
Number: Currency amount US & EU (cents optional) Can use US-style 123,456.78 notation and European-style 123.456,78 notation. Optional thousands separators; optional two-digit fraction
Match; JGsoft:
^[+-]?[0-9]{1,3}(?:[0-9]*(?:[.,][0-9]{2})?|(?:,[0-9]{3})*(?:\.[0-9]{2})?|(?:\.[0-9]{3})*(?:,[0-9]{2})?)$