Question

How to check if a string contains only letters and numbers using RegEx in VB.NET

Answer 1

Imports System
Imports System.Text.RegularExpressions

Public Class Program
	Public Shared Function IsAlphanumeric(ByVal str As String) As Boolean
        Dim alphanumericPattern As String = "^[a-zA-Z0-9]+$"
        Return Regex.IsMatch(str, alphanumericPattern)
    End Function

    Public Shared Sub Main()
        Dim str As String = "VuZ3q7J4wo35Pi"

        If IsAlphanumeric(str) Then
            Console.WriteLine("The string contains only letters and numbers.")
        Else
            Console.WriteLine("The string contains characters other than letters and numbers.")
        End If
    End Sub
End Class


 
' run:
'
' The string contains only letters and numbers.
'

 

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