ASP.NET 之正则表达式

转载自：http://www.regexlib.com/cheatsheet.htm?AspxAutoDetectCookieSupport=1

Metacharacters Defined
MChar	Definition
^	Start of a string.
$	End of a string.
.	Any character (except 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
asc	a c

Character Escapes http://tinyurl.com/5wm3wl
Escaped Char	Description
ordinary characters	Characters other than . $ ^ { [ ( | ) ] } * + ? match themselves.
a	Matches a bell (alarm) u0007.
	Matches a backspace u0008 if in a []; otherwise matches a word boundary (between w and W characters).
	Matches a tab u0009.
	Matches a carriage return u000D.
v	Matches a vertical tab u000B.
f	Matches a form feed u000C.
	Matches a new line u000A.
e	Matches an escape u001B.
40	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 40 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://tinyurl.com/5ck4ll
Char Class	Description
.	Matches any character except . 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 vx85p{Z}]. If ECMAScript-compliant behavior is specified with the ECMAScript option, s is equivalent to [ f v].
S	Matches any non-white-space character. Equivalent to the Unicode character categories [^f vx85p{Z}]. If ECMAScript-compliant behavior is specified with the ECMAScript option, S is equivalent to [^ f 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.