C # Regular Expressions

Letters:

Digital

Single digit \d

Non-digital \d

Character Boundary \b

Any character.

Character dot \.

or [ABC]: Match A or B or C can match

Repeat multiple c{2} matches two C

Repeat multiple (range) b{2,3} match repeat 2 to 3 times B

Repeat multiple times (0-Multiple) b* match 0 to multiple B

Repeat multiple (1-Multiple) B + matches 1 to multiple B

Match a single B? Match either have B or no B

Match Blank \s (small s)

Match all the places that are not blank \s (big S)

Opening ^

End $

Any length *

Comprehensive testing:

^abb.*b34$ matches all of the examples

Explanation with the beginning of ABB, any character any length matches, finally with b34 end

Match a paragraph (ABBC)

Match all (. *)

All characters \w (lowercase) one match (not including symbols)

In addition to all characters that are symbols \w (uppercase) one match

string[] values = {"111-22-3333","212-64-4321","12133213232132" }; stringPattern =@"^\d{3}-\d{2}-\d{4}"; foreach(stringAinchvalues) {                if(Regex.IsMatch (A, pattern)) {Console.WriteLine ("{0} is valid", a); }                Else{Console.WriteLine ("{0} is not valid", a); }} console.readline ();

C # Regular Expressions