.NET Regular Expression Cheat Sheet Metacharacters Defined MChar Definition ^ Start of a string. $ End of a string. . Any character (except \n newline) | Alternation. {...} Explicit quantifier notation. [...] Explicit set of characters to match. (...) Logical grouping of part of an expression. * 0 or more of previous expression. + 1 or more of previous expression. ? 0 or 1 of previous expression; also forces minimal matching when an expression might match several strings within a search string. \ Preceding one of the above, it makes it a literal instead of a special character. Preceding a special matching character, see below. Metacharacter Examples Pattern Sample Matches ^abc abc, abcdefg, abc123, ... abc$ abc, endsinabc, 123abc, ... a.c abc, aac, acc, adc, aec, ... bill|ted ted, bill ab{2}c abbc a[bB]c abc, aBc (abc){2} abcabc ab*c ac, abc, abbc, abbbc, ... ab+c abc, abbc, abbbc, ... ab?c ac, abc a\sc a c Character Escapes http://msdn.microsoft.com/library/en-us/cpgenref/html/cpconcharacterescapes.asp Escaped Char Description ordinary characters Characters other than . $ ^ { [ ( | ) ] } * + ? \ match themselves. \a Matches a bell (alarm) \u0007. \b Matches a backspace \u0008 if in a []; otherwise matches a word boundary (between \w and \W characters). \t Matches a tab \u0009. \r Matches a carriage return \u000D. \v Matches a vertical tab \u000B. \f Matches a form feed \u000C. \n Matches a new line \u000A. \e Matches an escape \u001B. \040 Matches an ASCII character as octal (up to three digits); numbers with no leading zero are backreferences if they have only one digit or if they correspond to a capturing group number. (For more information, see Backreferences.) For example, the character \040 represents a space. \x20 Matches an ASCII character using hexadecimal representation (exactly two digits). \cC Matches an ASCII control character; for example \cC is control-C. \u0020 Matches a Unicode character using a hexadecimal representation (exactly four digits). \* When followed by a character that is not recognized as an escaped character, matches that character. For example, \* is the same as \x2A. Character Classes http://msdn.microsoft.com/library/en-us/cpgenref/html/cpconcharacterclasses.asp Char Class Description . Matches any character except \n. If modified by the Singleline option, a period character matches any character. For more information, see Regular Expression Options. [aeiou] Matches any single character included in the specified set of characters. [^aeiou] Matches any single character not in the specified set of characters. [0-9a-fA- F] Use of a hyphen (–) allows specification of contiguous character ranges. \p{name} Matches any character in the named character class specified by {name}. Supported names are Unicode groups and block ranges. For example, Ll, Nd, Z, IsGreek, IsBoxDrawing. \P{name} Matches text not included in groups and block ranges specified in {name}. \w Matches any word character. Equivalent to the Unicode character categories [\p{Ll}\p{Lu}\p{Lt}\p{Lo}\p{Nd}\p{Pc}]. If ECMAScript-compliant behavior is specified with the ECMAScript option, \w is equivalent to [a-zA-Z_0-9]. \W Matches any nonword character. Equivalent to the Unicode categories [^\p{Ll}\p{Lu}\p{Lt}\p{Lo}\p{Nd}\p{Pc}]. If ECMAScript-compliant behavior is specified with the ECMAScript option, \W is equivalent to [^a-zA-Z_0-9]. \s Matches any white-space character. Equivalent to the Unicode character categories [\f\n\r\t\v\x85\p{Z}]. If ECMAScript-compliant behavior is specified with the ECMAScript option, \s is equivalent to [ \f\n\r\t\v]. \S Matches any non-white-space character. Equivalent to the Unicode character categories [^\f\n\r\t\v\x85\p{Z}]. If ECMAScript-compliant behavior is specified with the ECMAScript option, \S is equivalent to [^ \f\n\r\t\v]. \d Matches any decimal digit. Equivalent to \p{Nd} for Unicode and [0-9] for non-Unicode, ECMAScript behavior. \D Matches any nondigit. Equivalent to \P{Nd} for Unicode and [^0-9] for non-Unicode, ECMAScript behavior.

NET Regular Expression Cheat Sheet.doc

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