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Regex: Get number only from a string | CodeAsp.Net

Regex: Get number only from a string

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In this blog I will show how to get number only from a string with REGEX. Let's say we have a string "Hello 123456789 user 456 welcome." and we want the output to be "123456789456". Below is the sample code to do the same:

using System;
using System.Linq;
using System.Text.RegularExpressions;

namespace SampleConsoleApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            const string inputString = @"Hello 123456789 user 456 welcome.";


            string output = Regex.Replace(inputString, @"[^\d]", ""); ;

            Console.WriteLine(output);
            Console.ReadLine();
        }
    }
}

Output:

Below is the explanation of regex:

[^\d]

Match any character that is NOT a “A single digit 0..9” «[^\d]»


Created with RegexBuddy

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