C# || How To Remove Non Alphanumeric Characters From A String Using C#

May 12, 2021 admin No comments

The following is a module with functions which demonstrates how to remove and replace non alphanumeric characters from a string using C#.

1. Alphanumeric Characters

The example below demonstrates the use of ‘Utils.Extensions.ToAlphaNumeric‘ to create an alphanumeric string.





		
		
			1. Alphanumeric Characters
			
C#
			
			// Alphanumeric Characters

using Utils;

var word = @"This-document_uses-3#other@documents!!!";

// Creates single space string
var result = word.ToAlphaNumeric();

Console.WriteLine(result);

// expected output:
/*
    This document uses 3 other documents
*/
			
				
					
				
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						// Alphanumeric Characters
 
using Utils;
 
var word = @"This-document_uses-3#other@documents!!!";
 
// Creates single space string
var result = word.ToAlphaNumeric();
 
Console.WriteLine(result);
 
// expected output:
/*
    This document uses 3 other documents
*/

2. Utils Namespace

The following is the Utils Namespace. Include this in your project to start using!





		
		
			Utils Namespace
			
C#
			
			// ============================================================================
//    Author: Kenneth Perkins
//    Date:   May 12, 2021
//    Taken From: http://programmingnotes.org/
//    File:  Utils.cs
//    Description: Handles general utility functions
// ============================================================================
using System;

namespace Utils {
    public static class Extensions {
        /// <summary>
        /// Returns the string as alphanumeric
        /// </summary>
        /// <param name="source">The source string</param>
        /// <param name="replacement">The string replacement for invalid characters</param>
        /// <returns>The modified source string</returns>
        public static string ToAlphaNumeric(this string source, string replacement = " ") {
            var pattern = "[^a-zA-Z0-9]+";
            var result = System.Text.RegularExpressions.Regex.Replace(source, pattern, replacement).Trim();
            return result;
        }
    }
}// http://programmingnotes.org/
			
				
					
				
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						// ============================================================================
//    Author: Kenneth Perkins
//    Date:   May 12, 2021
//    Taken From: http://programmingnotes.org/
//    File:  Utils.cs
//    Description: Handles general utility functions
// ============================================================================
using System;
 
namespace Utils {
    public static class Extensions {
        /// <summary>
        /// Returns the string as alphanumeric
        /// </summary>
        /// <param name="source">The source string</param>
        /// <param name="replacement">The string replacement for invalid characters</param>
        /// <returns>The modified source string</returns>
        public static string ToAlphaNumeric(this string source, string replacement = " ") {
            var pattern = "[^a-zA-Z0-9]+";
            var result = System.Text.RegularExpressions.Regex.Replace(source, pattern, replacement).Trim();
            return result;
        }
    }
}// http://programmingnotes.org/

3. More Examples

Below are more examples demonstrating the use of the ‘Utils‘ Namespace. Don’t forget to include the module when running the examples!





		
		
			More Examples
			
C#
			
			// ============================================================================
//    Author: Kenneth Perkins
//    Date:   May 12, 2021
//    Taken From: http://programmingnotes.org/
//    File:  Program.cs
//    Description: The following demonstrates the use of the Utils Namespace
// ============================================================================
using System;
using System.Diagnostics;
using Utils;

public class Program {
    static void Main(string[] args) {
        try {
            var word = @"This-document_uses-3#other@documents!!!";

            // Creates single space string
            var result = word.ToAlphaNumeric();

            Display(result);
        } catch (Exception ex) {
            Display(ex.ToString());
        } finally {
            Console.ReadLine();
        }
    }

    static void Display(string message) {
        Console.WriteLine(message);
        Debug.Print(message);
    }
}// http://programmingnotes.org/
			
				
					
				
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						// ============================================================================
//    Author: Kenneth Perkins
//    Date:   May 12, 2021
//    Taken From: http://programmingnotes.org/
//    File:  Program.cs
//    Description: The following demonstrates the use of the Utils Namespace
// ============================================================================
using System;
using System.Diagnostics;
using Utils;
 
public class Program {
    static void Main(string[] args) {
        try {
            var word = @"This-document_uses-3#other@documents!!!";
 
            // Creates single space string
            var result = word.ToAlphaNumeric();
 
            Display(result);
        } catch (Exception ex) {
            Display(ex.ToString());
        } finally {
            Console.ReadLine();
        }
    }
 
    static void Display(string message) {
        Console.WriteLine(message);
        Debug.Print(message);
    }
}// http://programmingnotes.org/

QUICK NOTES:
The highlighted lines are sections of interest to look out for.

The code is heavily commented, so no further insight is necessary. If you have any questions, feel free to leave a comment below.

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Posted in: C#, Console Tags: c-sharp, string alphanumeric

C# || How To Remove Non Alphanumeric Characters From A String Using C#

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