Question

How to validate a 10-digit standard 10 digit phone number using RegEx in VB.NET

Answer 1

Imports System
Imports System.Text.RegularExpressions

Public Class Program
	Public Shared Sub Main()
        Dim phoneNumbers As String() = {"333-555-1234", "(333)-555-1234", "333 555 1234", "333.555.1234", "+91 (333) 555-1234"}
        Dim pattern As String = "^(\+\d{1,2}\s)?\(?\d{3}\)?[\s.-]?\d{3}[\s.-]?\d{4}$"

        For Each phoneNumber In phoneNumbers
            If Regex.IsMatch(phoneNumber, pattern) Then
                Console.WriteLine("Valid phone number format")
            Else
                Console.WriteLine("Invalid phone number format")
            End If
        Next
    End Sub
End Class



' run:
'
' Valid phone number format
' Valid phone number format
' Valid phone number format
' Valid phone number format
' Valid phone number format
' 

 

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