Replace words in a string using regular expressions C#

Question

string sentence = "My current address is #6789, Baker Avenue (CB)".

I would like to replace #6789, Baker Avenue ( with #574, Tomson Street (.

Regular expression would be ^#.*($

How can I do this in C#?

`var result = sentence.Replace("#6789, Baker Avenue (","#574, Tomson Street (");` sorted — TheGeneral, Aug 23 '18 at 06:30
is `string sentence` the only example of what needs to be replaced? or do you have more of those sentences that share a certain pattern? — Mong Zhu, Aug 23 '18 at 06:35
All the issues are too well-known, see the linked threads that answer and *teach* you how to solve such problems in the future. — Wiktor Stribiżew, Aug 23 '18 at 06:53

mnieto · Answer 1 · 2018-08-23T06:45:27.973

2

using System;
using System.Text.RegularExpressions;

public class Program
{
    public static void Main()
    {
        string address = "My current address is #6789, Baker Avenue (CB)";
        Regex regex = new Regex("#.+\\(");
        address = regex.Replace(address, "#574, Tomson Street (");
        Console.WriteLine(address);
    }
}

You need to escape the opening bracket. Also in c# \ character must be escaped, so we need the combination \\( I have removed ^ and $ form your proposal. That characters anchor the pattern to the beginning and end of the phrase. And this is not the case.

edited Aug 23 '18 at 06:45

answered Aug 23 '18 at 06:34

mnieto

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Kinda unrelated, do you know how to quickly test .net regexp online? http://regexstorm.net/tester seems to never work for me. Giving issues with this pattern too. – Erndob Aug 23 '18 at 06:38
1

I just have tested on it. Just put `#.*\(` as pattern and `My current address is #6789, Baker Avenue (CB)` as input – mnieto Aug 23 '18 at 06:42
@Erndob try this one: https://regex101.com – Mong Zhu Aug 23 '18 at 06:42

score 1 · Answer 2 · answered Aug 23 '18 at 06:37

Try this:

string sentence = "My current address is #6789, Baker Avenue (CB)";

var result = Regex.Replace(sentence, @"#\d+,[^(]+", "#574, Tomson Street ");

The pattern is #\d+,[^(]+.

It's a hash #, followeg by at least one digit \d+, comma, and at least one character which isn't opening bracket: [^(]+

Replace words in a string using regular expressions C#

2 Answers2