CODEWITHSUNDEEP
c#regex
SamiHuutoniemi
SamiHuutoniemi

Reputation: 1595

How do I get the match in a Regex.Replace into the replacement string?

I need the match in the Regex.Replace to be part of the replacement string. For example, if I want to change DOMAIN to <a>DOMAIN</a>, wherever it says DOMAIN. How do I get DOMAIN into the match?

regex.Replace(input, String.Format("<a>{0}</a>" WHAT_HERE?));

How do I find the "WHAT_HERE?"?

Upvotes: 0

Views: 69

Answers (2)

DLeh
DLeh

Reputation: 24395

Andrew's answer is correct, here's how you'd do it if you wanted to name the grouping and then replace it by name (expanded from Andrew's dotnetfiddle):

using System;
using System.Text.RegularExpressions;

public class Program
{
    public static void Main()
    {
        string result = Regex.Replace("This is a test to see if DOMAIN gets replaced properly. DOMAIN", "(?<myName>DOMAIN)", "<a>${myName}</a>");

        result.Dump();
    }
}

Output:

This is a test to see if <a>DOMAIN</a> gets replaced properly. <a>DOMAIN</a>

Upvotes: 0

Andrew Whitaker
Andrew Whitaker

Reputation: 126052

You can use a grouping construct (...):

string replaced = Regex.Replace("<input>", "(DOMAIN)", "<a>$1</a>");

Example: https://dotnetfiddle.net/Hu0cEO

Upvotes: 1

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