How to replace only a part of a Regex matched string in .NET?

Question

Given the string: "+49 ( 0 ) 162 12345 0162"

And the regex: ^(+\s*4\s*9\s*(\s*0\s*)|+\s*4\s*9|0\s*0\s*4\s*9|0|(\s*0\s*))\s*(15|16|17)

It matches: "+49 ( 0 ) 16"

Now I want to replace everything before 16, so that results in "162 12345 0162".

I have so far:

        Regex regex = new Regex( @"^(\+\s*4\s*9\s*\(\s*0\s*\)|\+\s*4\s*9|0\s*0\s*4\s*9|0|\(\s*0\s*\))\s*(15|16|17)");
        string result = regex.Replace( "+49 ( 0 ) 162 12345 0162", "" );

But that returns "2 12345 0162".

Thank you!

Wiktor Stribiżew · Accepted Answer · 2017-03-15 16:49:37Z

1

(15|16|17) part of your pattern - the second capturing group - matches and captures 16. Thus, you need to replace with $2 backreference.

string result = regex.Replace( "+49 ( 0 ) 162 12345 0162", "$2" );

See the regex demo

answered Mar 15, 2017 at 16:49

Wiktor Stribiżew

631k41 gold badges502 silver badges632 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Powerslave Over a year ago

Thank you very much

Sangbok Lee · Accepted Answer · 2017-03-15 16:51:42Z

0

Is (15|16|17) at the end really necessary? Removing it will give you desired result.

answered Mar 15, 2017 at 16:51

Sangbok Lee

2,2353 gold badges17 silver badges33 bronze badges

1 Comment

Powerslave Over a year ago

Yes it's necessary, because I dont want to match i.e. "+49 ( 0 ) 142 12345 0162"

Collectives™ on Stack Overflow

How to replace only a part of a Regex matched string in .NET?

2 Answers 2

1 Comment

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related