Regex expression for a String

[Dhruvi_Arumugam]

Hi All,

Need help in generating Regex expression for the below string.

I want to use a regular expression in an if condition to check if the current string is matching that syntax or not.
String is in form of Service Now ChangeRequest Number eg → CHG1234567, CHG3247586, CHG5768479 etc. Also, it should be not case sensitive.
the digits post CHG can be n number of digits like 8,9,10 etc. Example - CHG12345678, CHG123456789 etc

Any help is appreciated.

Thanks!!

[ppr (Peter)]

pattern could look like this:
CHG\d{7}\b

@Dhruvi_Arumugam

Also, it should be not case sensitive.

for this we are using the CaseInsensitive regex option

[Tapan_Behera1 (Tapan Behera)]

Hi @Dhruvi_Arumugam check this regex pattern: (?:chg\d{1,7})

[Dhruvi_Arumugam]

Hi @ppr

Thanks for the quick reply

In the expression you provided I can see you have use d{7} but if the digits increase than 7 will in that case it will work?

The expression should ideally check for this format starting with “CHG” and then having any n number of digits that makes a valid change request.

@ppr

d{7}

Thanks

[ppr (Peter)]

we can use for this CHG\d+\b
Kindly note:

@ppr

@Dhruvi_Arumugam

Also, it should be not case sensitive.

for this we are using the CaseInsensitive regex option

[Dhruvi_Arumugam]

How can we use this in If condition?

[Dhruvi_Arumugam]

Thanks @Tapan_Behera1

The number of digits post CHG is not fixed

Thanks!

[ppr (Peter)]

[CheatSheet] - System.Text.RegularExpressions | RegEx

This CheatSheet introduces the basic use of regex functions. With further examples also special cases are presented. Introduction From the namespace System.Text.RegularExpressions following methods are offered: Regex.Match Regex.Matches Regex.isMatch Regex.Replace Regex.Split A simple usage for example would look like this: [grafik] Recommendation: add System.Text.RegularExpressions to the imports: [grafik] it allows to use the shortened statement, as the namespace part can be ommited…

System.Text.RegularExpressions.Regex.isMatch("YourString","CHG\d+\b",RegexOptions.IgnoreCase)

[Gokul001 (Gokul Balaji)]

HI @Dhruvi_Arumugam

You can Try with this Regex Expression in If activity

System.Text.RegularExpressions.Regex.IsMatch(YourString,"CHG\d*\b")

Regards
Gokul

[Tapan_Behera1 (Tapan Behera)]

@Dhruvi_Arumugam Okay then just update it to (?:chg\d*)

if you want to match at least one number or more then in that case you can change (*) to (+)

[Gokul001 (Gokul Balaji)]

Check out the screenshot @Dhruvi_Arumugam

[ppr (Peter)]

@Gokul001

Check out the screenshot @Dhruvi_Arumugam

to complete the series:

as * means 0 or unlimited it will also match CHG without numbers

[Dhruvi_Arumugam]

Thanks a lot @ppr @Gokul001 @Tapan_Behera1 for your valuable responses !