VB.NET || How To Remove Non Alphanumeric Characters From A String Using VB.NET

November 24, 2020 admin No comments

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

1. Alphanumeric Characters

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





		
		
			1. Alphanumeric Characters
			
Visual Basic .NET
			
			' Alphanumeric Characters

Imports Utils

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

' Create alpha numeric string
Dim result = word.ToAlphaNumeric

Debug.Print(result)

' expected output:
'    This document uses 3 other documents
			
				
					
				
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						' Alphanumeric Characters
 
Imports Utils
 
Dim word = "This-document_uses-3#other@documents!!!"
 
' Create alpha numeric string
Dim result = word.ToAlphaNumeric
 
Debug.Print(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
			
Visual Basic .NET
			
			' ============================================================================
'    Author: Kenneth Perkins
'    Date:   Nov 24, 2020
'    Taken From: http://programmingnotes.org/
'    File: Utils.vb
'    Description: Handles general utility functions
' ============================================================================
Option Strict On
Option Explicit On

Namespace Global.Utils
    Public Module modUtils
        ''' <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>
        <Runtime.CompilerServices.Extension()>
        Public Function ToAlphaNumeric(source As String, Optional replacement As String = " ") As String
            Dim pattern = "[^a-zA-Z0-9]+"
            Dim result = System.Text.RegularExpressions.Regex.Replace(source, pattern, replacement).Trim
            Return result
        End Function
    End Module
End Namespace ' http://programmingnotes.org/
			
				
					
				
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						' ============================================================================
'    Author: Kenneth Perkins
'    Date:   Nov 24, 2020
'    Taken From: http://programmingnotes.org/
'    File: Utils.vb
'    Description: Handles general utility functions
' ============================================================================
Option Strict On
Option Explicit On
 
Namespace Global.Utils
    Public Module modUtils
        ''' <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>
        <Runtime.CompilerServices.Extension()>
        Public Function ToAlphaNumeric(source As String, Optional replacement As String = " ") As String
            Dim pattern = "[^a-zA-Z0-9]+"
            Dim result = System.Text.RegularExpressions.Regex.Replace(source, pattern, replacement).Trim
            Return result
        End Function
    End Module
End Namespace ' 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
			
Visual Basic .NET
			
			' ============================================================================
'    Author: Kenneth Perkins
'    Date:   Nov 24, 2020
'    Taken From: http://programmingnotes.org/
'    File: Program.vb
'    Description: The following demonstrates the use of the Utils Namespace
' ============================================================================
Option Strict On
Option Explicit On
Imports System
Imports Utils

Module Program
    Sub Main(args As String())
        Try
            Dim word = "This-document_uses-3#other@documents!!!"

            ' Create alpha numeric string
            Dim result = word.ToAlphaNumeric

            Display(result)
        Catch ex As Exception
            Display(ex.ToString)
        Finally
            Console.ReadLine()
        End Try
    End Sub

    Public Sub Display(message As String)
        Console.WriteLine(message)
        Debug.Print(message)
    End Sub
End Module ' http://programmingnotes.org/
			
				
					
				
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						' ============================================================================
'    Author: Kenneth Perkins
'    Date:   Nov 24, 2020
'    Taken From: http://programmingnotes.org/
'    File: Program.vb
'    Description: The following demonstrates the use of the Utils Namespace
' ============================================================================
Option Strict On
Option Explicit On
Imports System
Imports Utils
 
Module Program
    Sub Main(args As String())
        Try
            Dim word = "This-document_uses-3#other@documents!!!"
 
            ' Create alpha numeric string
            Dim result = word.ToAlphaNumeric
 
            Display(result)
        Catch ex As Exception
            Display(ex.ToString)
        Finally
            Console.ReadLine()
        End Try
    End Sub
 
    Public Sub Display(message As String)
        Console.WriteLine(message)
        Debug.Print(message)
    End Sub
End Module ' 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: Console, VB.NET Tags: string alphanumeric, vb.net

VB.NET || How To Remove Non Alphanumeric Characters From A String Using VB.NET

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