Replace Line Breaks in a String C#

Question

How can I replace Line Breaks within a string in C#?

Answer 1

The solutions posted so far either only replace Environment.NewLine or they fail if the replacement string contains line breaks because they call string.Replace multiple times.

Here's a solution that uses a regular expression to make all three replacements in just one pass over the string. This means that the replacement string can safely contain line breaks.

string result = Regex.Replace(input, @"\r\n?|\n", replacementString);

Answer 2

Use replace with Environment.NewLine

myString = myString.Replace(System.Environment.NewLine, "replacement text"); //add a line terminating ;

As mentioned in other posts, if the string comes from another environment (OS) then you'd need to replace that particular environments implementation of new line control characters.

Answer 3

As new line can be delimited by \n, \r and \r\n, first we’ll replace \r and \r\n with \n, and only then split data string.

The following lines should go to the parseCSV method:

function parseCSV(data) {
    //alert(data);
    //replace UNIX new lines
    data = data.replace(/\r\n/g, "\n");
    //replace MAC new lines
    data = data.replace(/\r/g, "\n");
    //split into rows
    var rows = data.split("\n");
}

Answer 4

string s = Regex.Replace(source_string, "\n", "\r\n");

or

string s = Regex.Replace(source_string, "\r\n", "\n");

depending on which way you want to go.

Hopes it helps.

Answer 5

if you want to "clean" the new lines, flamebaud comment using regex @"[\r\n]+" is the best choice.

using System;
using System.Text.RegularExpressions;

class MainClass {
  public static void Main (string[] args) {
    string str = "AAA\r\nBBB\r\n\r\n\r\nCCC\r\r\rDDD\n\n\nEEE";

    Console.WriteLine (str.Replace(System.Environment.NewLine, "-"));
    /* Result:
    AAA
    -BBB
    -
    -
    -CCC


    DDD---EEE
    */
    Console.WriteLine (Regex.Replace(str, @"\r\n?|\n", "-"));
    // Result:
    // AAA-BBB---CCC---DDD---EEE

    Console.WriteLine (Regex.Replace(str, @"[\r\n]+", "-"));
    // Result:
    // AAA-BBB-CCC-DDD-EEE
  }
}