execute code on load in vb.net aspx page - asp.net

Question

I appreciate help for this issue which stoled a lot of hours.
I have this code:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
Label1.Text = "924 695 302"
Label2.Text = "690 142 449"
Dim ipvisitante = Request.ServerVariables("remote_addr")
Dim hoje = DateTime.Now
Dim informacao = ipvisitante & " --- " & hoje
'Send e-mail
Dim strFrom = "fernandopessoa#fpessoa.net" ''IMPORTANT: This must be same as your smtp authentication address.
Dim strTo = "francopessoa.espana#hotmail.com"
Dim MailMsg As New MailMessage(New MailAddress(strFrom.Trim()), New MailAddress(strTo))
MailMsg.BodyEncoding = Encoding.Default
MailMsg.Subject = "This is a test"
MailMsg.Body = "This is a sample message using SMTP authentication"
MailMsg.Priority = MailPriority.High
MailMsg.IsBodyHtml = True
'Smtpclient to send the mail message
Dim SmtpMail As New SmtpClient
Dim basicAuthenticationInfo As New Net.NetworkCredential("fernandopessoa#fpessoa.net", "---------")
''IMPORANT: Your smtp login email MUST be same as your FROM address.
SmtpMail.Host = "mail.fpessoa.net"
SmtpMail.UseDefaultCredentials = False
SmtpMail.Credentials = basicAuthenticationInfo
MsgBox("O ficheiro existe", MsgBoxStyle.Information, "SIM")
'Write to txt File
FileOpen(1, "visitas.txt", OpenMode.Append)
WriteLine(1, informacao)
FileClose()
End Sub
Now, when the page Loads, the text apears in the Labels.
Surprisingly, it doesn't execute the rest of the code, Display Msgbox, Write to the .txt File and send the e-mail.
Can anyone give me a clue of what's going wrong with my code?
Thanks in advance.

Answer 1

The code does execute... it runs on the Web Server. It does not run in the client's web browser, and never will.
That explains the MsBox() and file, though the web server may also be getting hung up waiting for someone to click "Okay" on a MsgBox no one will ever see. For the e-mail, you never call SmtpMail.Send(MailMsg)
While I'm here, that file code is using an antique api.
It sounds like you need a quick primer on how this all works, so here is what happens step by step:
User clicks a link to your page or types your page address in their address bar.
The browser sends an HTTP request to your server.
Your server receives the request, creates a new instance of your page class in a worker thread.
Code runs in your page class for ALL phases of the ASP.Net Page Lifecycle .
The ASP.Net runtime uses your page class instance to render an HTTP response (usually in html) and send it to the browser.
Your page class instance is destroyed.
The browser receives the response, parses a new Document Object Model (DOM), and renders that DOM to the display.
The user sees and interacts with your page, causing a post-back.
Go to step 2, taking special note of the "new instance" phrase when you reach step 3.