Regex to remove \n\ from a string in C# (Not \n)

Question

I am looking for a 'Regex' to replace \n\ from my string. I already looked thorough this post and other regex posts here, but in my case I need to remove the value \n\ from a string not a new line or (\n).

For example:

string eneteredString = @"abc\n\def\n\ghi\n\\";

Here \\ can be found multiple times too.

I have already tried Replacing Enviornment.NewLine, as it is not a new line in my case, it also didn't work. When I try below code,

string regout = Regex.Replace(enteredString, @"\n\","");

It says parsing "\n\" - Illegal \ at the end of pattern . Can you anyone please help me with the same. Thanks in advance.

Use a mere String.Replace. `eneteredString.Replace(@"\n\", "")` — Wiktor Stribiżew, Dec 21 '16 at 13:53
@WiktorStribiżew Thanks, but if I use `String.Replace` it will be removing only one occurrence right? — Sibeesh Venu, Dec 21 '16 at 14:00
@SibeeshVenu: Where did you get it from? String.Replace replaces all occurrences. This is not JavaScript. — Wiktor Stribiżew, Dec 21 '16 at 14:01
@WiktorStribiżew Thanks much, I totally lost my control, thanks much for the light. What I was doing is, checking the value of `eneteredString` after the statement `eneteredString.Replace(@"\n\", "")` instead of assigning that value to some other string variable and check. — Sibeesh Venu, Dec 21 '16 at 14:07

Cyril Gandon · Accepted Answer · 2016-12-21T13:55:39.380

4

Who need regex?

string regout = @"abc\n\def\n\ghi\n\\".Replace(@"\n\", "");

And just because quotes are cool, here is the famous:

Some people, when confronted with a problem, think "I know, I'll use regular expressions." Now they have two problems.

edited Dec 21 '16 at 13:55

answered Dec 21 '16 at 13:54

Cyril Gandon

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`regout` is just a lie now :) – Jonesopolis Dec 21 '16 at 13:55
@CyrilGandon Thanks, but if I use `String.Replace` it will be removing only one occurrence right? – Sibeesh Venu Dec 21 '16 at 14:01
nop, every occurence will be replaced, see @RajshekarReddy screenshot : http://stackoverflow.com/a/41264492/128662 – Cyril Gandon Dec 21 '16 at 14:03
@CyrilGandon Thanks much, I totally lost my control, thanks much for the light. What I was doing is, checking the value of `eneteredString` after the statement `eneteredString.Replace(@"\n\", "")` instead of assigning that value to some other string variable and check. – Sibeesh Venu Dec 21 '16 at 14:07
@CyrilGandon Just curious to know, what if I need to add the values we get after the `Replace` to a `List`? Can we do that without looping through? – Sibeesh Venu Dec 21 '16 at 14:18
I'm not sure what you mean. Adding the string to a List? maybe you should ask a new question. – Cyril Gandon Dec 21 '16 at 14:35

score 1 · Answer 2 · answered Dec 21 '16 at 13:57

1

use @"\\n\\" . You need to remove the meaning of the escape character \ by adding a \ before it.. Here is a testing image

answered Dec 21 '16 at 13:57

Rajshekar Reddy

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Thanks much for the light. – Sibeesh Venu Dec 21 '16 at 14:08
@SibeeshVenu glad to help.. :) – Rajshekar Reddy Dec 21 '16 at 14:09
Just curious to know, what if I need to add the values we get after the Replace to a List? Can we do that without looping through? – Sibeesh Venu Dec 21 '16 at 14:21

I'm here for Winter Hats · Answer 3 · 2016-12-21T14:02:18.103

0

This is what you want. The reason is due to how regex handles the single \

string regout = Regex.Replace(enteredString, @"\\n\\","");

edited Dec 21 '16 at 14:02

answered Dec 21 '16 at 13:56

I'm here for Winter Hats

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No, with @, it's not the compiler, it's the Regex who's responsible for that behavior – Thomas Weller Dec 21 '16 at 13:59

Regex to remove \n\ from a string in C# (Not \n)

3 Answers3