Question

How to remove all non-alphanumeric characters from a string except dashes (-) and spaces in C#

Answer 1

using System;
using System.Text.RegularExpressions;
 
class Program
{
    static void Main()
    {
        string s = "-c#-  >>-progr{123}amm.. #$ing-";

        Regex rgx = new Regex("[^a-zA-Z0-9 -]");
        s = rgx.Replace(s, "");
         
        Console.WriteLine(s);
    }
}
 
 
/*
run:
 
-c-  -progr123amm ing-
 
*/

 

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Answer 2

using System;
  
class Program
{
    static void Main()
    {
        string s = "-c#-  >>-progr{123}amm.. #$ing-";
          
        char[] arr = s.ToCharArray();
  
        arr = Array.FindAll<char>(arr, (ch => (char.IsLetterOrDigit(ch) 
                                           || char.IsWhiteSpace(ch) 
                                           || ch == '-')));
                                          
        s = new string(arr);
          
        Console.WriteLine(s);
    }
}
  
  
/*
run:
  
-c-  -progr123amm ing-
  
*/

 

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