Email Validating using system.net.mail

Question

I have the following code to validate the email. It worked well if only simple text is entered. But when I am entering the partial text say test@ only it doesn't throws exception. Can you please guide me what am I missing.

Try
    Dim M As New System.Net.Mail.MailAddress(Txt_Email.Text)
Catch ex As FormatException
    MsgBox(ex.Message, MsgBoxStyle.Critical + MsgBoxStyle.OkOnly)
    Txt_Email.Text = string.Empty
Exit Sub
End Try

Thanks in Adavance

Omer

Check this out: http://www.regular-expressions.info/email.html, where it says `The Official Standard: RFC 5322`. — Victor Zakharov, Jul 14 '14 at 19:52

score 0 · Accepted Answer · edited May 23 '17 at 11:50

You could implement a simple check, validating the given e-mail adres like:

Public Function EmailIsValid(emailaddress As String) As Boolean
    Try
        Dim address = New MailAddress(emailaddress)
        Return True
    Catch ex As Exception
        Return False
    End Try
End Function

Call it like:

Dim result as Boolean = EmailIsValid(Txt_Email.Text)

result will be filled with true if this is a valid e-mailaddress and will be filled with false if it isn't. But, there are better ways checking if an emailaddress is valid. Perhaps using Regex.

The way I mentioned above isn't that good, since manipulating code using try/catch is a bad idea.

A Regex way of doing this can be found here: Using a regular expression to validate an email address

Email Validating using system.net.mail

1 Answers1