Validating Email Address Using Regex or Regular Expression

A tutorial validating email address through textbox using Visual Basic .NET, So it is more on detecting the ‘@’ and the ‘.’ Symbol.

Open your Visual Basic .NET Application.

Step 1:
Create a New Project, go to File Menu and navigate to New > Project then name it ValidateEmail (see Image below)

Step 2:
Next, Add a New Form by navigating in Project Menu and Click Add Windows Form. You can change the name of your form if you want (optional).

Step 3: Add 1 Label, 1 Button and 1 TextBox (Please refer the image below).

Label Property

Name: Label1

Text: Validate Email:

TextBox Property

Name: txtEmail

Button Property

Name: btnValidate

Text: Validate

Then go to your code editor and paste this code.

Imports System.Text.RegularExpressions

Public Class frmValidateEmail

    'Validate Email Address Using Regex

    Public Function validateEmail(ByVal emailAddress) As Boolean

        Dim email As New Regex("([\w-+]+(?:\.[\w-+]+)*@(?:[\w-]+\.)+[a-zA-Z]{2,7})")

        If email.IsMatch(emailAddress) Then

            Return True

        Else

            Return False

        End If

    End Function

    Private Sub btnValidate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnValidate.Click

        If validateEmail(txtEmail.Text) = True Then

            MsgBox("Email is Valid")

            'proceed and save email

        Else

            MsgBox("Email is not Valid")

        End If

    End Sub

End Class

Final runtime output:

Enjoy!!