Regex to check for specific pattern in String

Question

I am tasked to use regex to verify a pattern in a string instead of using substrings due to accuracy reasons.

The string is as follows:

I need to verify that the string is in the format as [GMT-CASE_<6 digits>].

A sample string:

[GMT-CASE_000001] Query on...

May I know how can this be done?

Thank you.

Do you mean matching 6 digits? \[GMT-CASE_[0-9]{6}]

The fourth bird
– The fourth bird

2019-09-21 12:27:44 +00:00
Commented Sep 21, 2019 at 12:27 — The fourth bird
– The fourth bird, Commented Sep 21, 2019 at 12:27
@Thefourthbird yes, matching 6 digits. my apologies.

gymcode
– gymcode

2019-09-21 12:29:33 +00:00
Commented Sep 21, 2019 at 12:29 — gymcode
– gymcode, Commented Sep 21, 2019 at 12:29

Bill Tür stands with Ukraine · Accepted Answer · 2019-09-21 12:38:30Z

1

You can use

\[GMT-CASE_[0-9]{6}\]

Explanation:

\[GMT-CASE_

This starts with the literal [GMT-CASE_. Since a square bracket has a special meaning in regular expressions you need to escape it with a backslash.

[0-9]{6}

Any character between 0 and 9, repeated 6 times.

\]

The closing bracket, again needed to be escaped.

Alternatively you can use \d instead of [0-9] for the digits. This would match non latin digits like the arabic ٦ as well.

edited Sep 21, 2019 at 12:38

answered Sep 21, 2019 at 12:31

Bill Tür stands with Ukraine

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touhid udoy · Accepted Answer · 2019-09-21 12:48:53Z

1

One possible answer would be \[GMT-CASE_[0-9]{6}\]

Check this https://regex101.com/r/tuDioP/1

edited Sep 21, 2019 at 12:48

answered Sep 21, 2019 at 12:28

touhid udoy

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medmik · Accepted Answer · 2019-09-21 13:05:44Z

0

try to use the @ before the string and the backslash before the brackets

Regex rx = new Regex(@"\[GMT-CASE_[0-9]{6}\]");
Console.WriteLine(rx.IsMatch("[GMT-CASE_000001]"));

; Use @ before to escape the \ behavior also if u want just only one match its important to mention the begin and the end of the regex ^..$

Regex rx = new Regex(@"^\[GMT-CASE_[0-9]{6}\]$");

edited Sep 21, 2019 at 13:05

answered Sep 21, 2019 at 12:50

medmik

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