CODEWITHSUNDEEP
c#regexc#-4.0
VADIVEL NATARAJAN user2505309
VADIVEL NATARAJAN user2505309

Reputation: 901

How to write the regex pattern to get the matched string?

Am struggling in writing the regular expression pattern for the below string. I used the below pattern to get the matched string. But, i got the error.

Note: The input string may be anyone of the below input string.

string input = "IN-7874 - hello";
// or "IN-7874 - Hello"
// "IN-7874 - 1) hello"
// "IN-7874 - 1. hello"
// "IN-7874 - 1)hello"
// "IN-7874 - 1.hello"
string pattern = @"^[A-Z]+\\-^[0-9]\s+\\-\\s+^[A-Z]"; //[any number of capital letters]hyphen[any number of numbers(0-9)]space[hyphen]space[numbers or strings]
var a = Regex.Match(input, pattern);

Could anyone please help me on this?

My output should be in the pattern form of [any number of capital letters]hyphen[any number of numbers(0-9)]space[hyphen]space

Example: {SAM-123 - }// don't consider the curly brace.

Upvotes: 1

Views: 59

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 627536

You can use

^[A-Z]+-[0-9]+\s+-\s+(?:[0-9]+[.)]\s*)?[A-Za-z]+

See the regex demo

Explanation:

  • ^ - start of string
  • [A-Z]+ - 1 or more uppercase ASCII letters
  • - - a hyphen
  • [0-9]+ - 1 or more digits
  • \s+ - 1+ whitespaces
  • - - a hyphen
  • \s+ - see above
  • (?:[0-9]+[.)]\s*)? - an optional sequence of:
    • [0-9]+ - 1+ digits
    • [.)] - a literal . or )
    • \s* - 0+ whitespaces
  • [A-Za-z]+ - 1 or more ASCII letters

Upvotes: 1

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