Regular Expression quick query table (ASP. NET)

Source: RegExLib.com Regular Expression Cheat Sheet (. NET)

Metacharacters	Description
^	Start position of matching string
$	End position of matching string
.	Match any single character (except line break \ n)
|	Alternate
{...}	Specify the quantity to limit
[...]	Character Set to be matched
(...)	Logical grouping of expressions
*	Matches zero or multiple previous expressions
+	Match one or more previous expressions
?	Matches zero or a previous expression.
\	Put it before any of the preceding characters to match the character itself. Put it behind other special characters to indicate escape characters (see below)
Character escape	Description
Original Character	Except. $ ^ {[(|)]} * +? \ All other characters match themselves
\	Matching ringtone (alert) \ u0007
\ B	Match a space \ u0008 in []. In other cases, match the word boundary (between \ w and \ W characters)
\ T	Matching tabs \ u0009
\ R	Carriage Return \ u000D
\ V	Matching vertical tab \ u000B
\ F	Match page feed \ u000C
\ N	Match line break \ u000A
\ E	Matched return key (character) \ u001B
\ 040	Matches the ASCII characters in octal notation (up to three digits). If there is no leading zero, only one digit or corresponding number corresponds to the number of a capture group, that is, backreference ). The \ 040 character represents a space.
\ X20	Matches ASCII characters in hexadecimal notation (two digits)
\ CC	Matches ASCII control characters, for example, \ cC matches Ctrl + C
\ U0020	Match Unicode characters in hexadecimal notation
\*	If the backslash is not followed by an escape character, it matches the character itself. For example, \ * is equivalent to \ x2A.
Character class	Description
.	Match any character except \ n.
[Aeiou]	Match any character contained in a specific character set
[^ Aeiou]	Match any character not contained in a specific character set
[0-9a-fA-F]	Hyphens (-) are used to specify consecutive character ranges.
\ P {name}	Match any character in the name character class specified by {name}
\ P {name}	Match text that is not included in the group or block range specified by {name}
\ W	Matching alphanumeric characters, equivalent to [a-zA-Z0-9] when specifying ECMAScript compatibility
\ W	Matching non-English alphanumeric characters is equivalent to [^ a-zA-Z0-9] When ECMAScript compatibility is specified
\ S	Matches any blank character. When ECMAScript compatibility is specified, it is equivalent to [\ f \ n \ r \ t \ v]
\ S	Matches any non-blank characters. When ECMAScript compatibility is specified, it is equivalent to [^ \ f \ n \ r \ t \ v].
\ D	Matches numeric characters. When ECMAScript compatibility is specified, it is equivalent to [0-9].
\ D	Matching non-numeric characters is equivalent to [^ 0-9] When ECMAScript compatibility is specified.

English version:

Metacharacters Defined
MChar	Definition
^	Start of a string.
$	End of a string.
.	Any character (character t \ 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://tinyurl.com/5wm3wl
Escaped Char	Description
Ordinary characters	Characters other than. $ ^ {[(|)]} * +? \ Match themselves.
\	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\ X2A.

Character Classes http://tinyurl.com/5ck4ll
Char Class	Description
.	Matches any character t \ 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 encoded 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 supported ded 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.