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Posted 23 Aug 2006

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Send a Text Message to a Cell Phone from a VB.NET Application

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4.66 (39 votes)
23 Aug 2006
This article describes a simple way to send text messages to a cellular phone from within a VB.NET desktop application.

Sample Image - screenshot.jpg

Introduction

This article describes a simple way to send text messages to a cellular phone from within a VB.NET desktop application. The source code provided includes a relatively good list of carriers to simplify the task of connecting with a cell phone, and the task itself is really no more difficult than sending an email message through a desktop or web based application.

Getting Started

In order to begin, unzip the downloaded files and open the project provided. Within the project, you will find one main class: frmMain.vb. The main form is a Windows application form, and it contains a few controls necessary to capture the fields needed to properly form the message. These fields include:

  • Recipient’s phone number: Captures the recipient’s cellular telephone number (10 digit).
  • Recipient’s carrier: Captures the recipient’s carrier.
  • Sender’s email address: Captures the sender’s email address.
  • Sender’s email server: Captures the name of the sender’s email server.
  • Message subject line: Captures the message’s title or subject.
  • Message body: Captures the sender’s message content.

The application is simple, but could easily be improved by validating each of the required fields through the use of regular expressions or by at least validating that the text associated with each of the text boxes is not an empty string. To maintain the simplicity of the project, little in the way of error handling has been included.

The following figure (Figure 1) shows a properly configured collection of input fields in use:

Sample Image - 1.jpg

Figure 1: The Demonstration Application in Use

A quick review of the code will reveal that there is little going on there. The following imports were added to the top of the class:

Imports System
Imports System.Net.Mail

The System.Net.Mail import brings in the support necessary to transmit the messages generated using the application. Following the imports and the class declaration, there is a Declarations region identified, and within that region is a collection of private member variables; these private member variables are created in order to supply each of the required elements of the message.

#Region "Declarations"
 
    ' message elements
    Private mMailServer As String
    Private mTo As String
    Private mFrom As String
    Private mMsg As String
    Private mSubject As String

#End Region

At this point, the only thing left to do in code is to write the following three methods:

#Region "Methods"
 
Private Sub frmMain_Load(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles MyBase.Load

    ' set up the carriers list - this is a fair list,
    ' you may wish to research the topic and add others,
    ' it took a while to generate this list...
    cboCarrier.Items.Add("@itelemigcelular.com.br")
    cboCarrier.Items.Add("@message.alltel.com")
    cboCarrier.Items.Add("@message.pioneerenidcellular.com")
    cboCarrier.Items.Add("@messaging.cellone-sf.com")
    cboCarrier.Items.Add("@messaging.centurytel.net")
    cboCarrier.Items.Add("@messaging.sprintpcs.com")
    cboCarrier.Items.Add("@mobile.att.net")
    cboCarrier.Items.Add("@mobile.cell1se.com")
    cboCarrier.Items.Add("@mobile.celloneusa.com")
    cboCarrier.Items.Add("@mobile.dobson.net")
    cboCarrier.Items.Add("@mobile.mycingular.com")
    cboCarrier.Items.Add("@mobile.mycingular.net")
    cboCarrier.Items.Add("@mobile.surewest.com")
    cboCarrier.Items.Add("@msg.acsalaska.com")
    cboCarrier.Items.Add("@msg.clearnet.com")
    cboCarrier.Items.Add("@msg.mactel.com")
    cboCarrier.Items.Add("@msg.myvzw.com")
    cboCarrier.Items.Add("@msg.telus.com")
    cboCarrier.Items.Add("@mycellular.com")
    cboCarrier.Items.Add("@mycingular.com")
    cboCarrier.Items.Add("@mycingular.net")
    cboCarrier.Items.Add("@mycingular.textmsg.com")
    cboCarrier.Items.Add("@o2.net.br")
    cboCarrier.Items.Add("@ondefor.com")
    cboCarrier.Items.Add("@pcs.rogers.com")
    cboCarrier.Items.Add("@personal-net.com.ar")
    cboCarrier.Items.Add("@personal.net.py")
    cboCarrier.Items.Add("@portafree.com")
    cboCarrier.Items.Add("@qwest.com")
    cboCarrier.Items.Add("@qwestmp.com")
    cboCarrier.Items.Add("@sbcemail.com")
    cboCarrier.Items.Add("@sms.bluecell.com")
    cboCarrier.Items.Add("@sms.cwjamaica.com")
    cboCarrier.Items.Add("@sms.edgewireless.com")
    cboCarrier.Items.Add("@sms.hickorytech.com")
    cboCarrier.Items.Add("@sms.net.nz")
    cboCarrier.Items.Add("@sms.pscel.com")
    cboCarrier.Items.Add("@smsc.vzpacifica.net")
    cboCarrier.Items.Add("@speedmemo.com")
    cboCarrier.Items.Add("@suncom1.com")
    cboCarrier.Items.Add("@sungram.com")
    cboCarrier.Items.Add("@telesurf.com.py")
    cboCarrier.Items.Add("@teletexto.rcp.net.pe")
    cboCarrier.Items.Add("@text.houstoncellular.net")
    cboCarrier.Items.Add("@text.telus.com")
    cboCarrier.Items.Add("@timnet.com")
    cboCarrier.Items.Add("@timnet.com.br")
    cboCarrier.Items.Add("@tms.suncom.com")
    cboCarrier.Items.Add("@tmomail.net")
    cboCarrier.Items.Add("@tsttmobile.co.tt")
    cboCarrier.Items.Add("@txt.bellmobility.ca")
    cboCarrier.Items.Add("@typetalk.ruralcellular.com")
    cboCarrier.Items.Add("@unistar.unifon.com.ar")
    cboCarrier.Items.Add("@uscc.textmsg.com")
    cboCarrier.Items.Add("@voicestream.net")
    cboCarrier.Items.Add("@vtext.com")
    cboCarrier.Items.Add("@wireless.bellsouth.com")

End Sub

Private Sub btnSend_Click(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles btnSend.Click

' Collect user input from the form and stow content into
' the objects member variables

    mTo = Trim(txtPhoneNumber.Text) & _
        Trim(cboCarrier.SelectedItem.ToString())
    mFrom = Trim(txtSender.Text)
    mSubject = Trim(txtSubject.Text)
    mMailServer = Trim(txtMailServer.Text)
    mMsg = Trim(txtMessage.Text)

' Within a try catch, format and send the message to
' the recipient. Catch and handle any errors.
    Try

        Dim message As New MailMessage(mFrom, mTo, mSubject, mMsg)
        Dim mySmtpClient As New SmtpClient(mMailServer)
        mySmtpClient.UseDefaultCredentials = True
        mySmtpClient.Send(message)

        MessageBox.Show("The mail message has been sent to " & _
                        message.To.ToString(), "Mail", _
                        MessageBoxButtons.OK, _
                        MessageBoxIcon.Information)

    Catch ex As FormatException

        MessageBox.Show(ex.StackTrace, ex.Message, _
                        MessageBoxButtons.OK, _
                        MessageBoxIcon.Error)

    Catch ex As SmtpException

        MessageBox.Show(ex.StackTrace, ex.Message, _
                        MessageBoxButtons.OK, _
                        MessageBoxIcon.Error)

    Catch ex As Exception

        MessageBox.Show(ex.StackTrace, ex.Message, _
                        MessageBoxButtons.OK, _
                        MessageBoxIcon.Error)
    End Try
End Sub

Private Sub btnExit_Click(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles btnExit.Click

' Upon user’s request, close the application
    Application.Exit()

End Sub
#End Region

At this point, the application should be complete. You may wish to build the solution and test it. Even though this example was intended to be simple, the overall concept may be used within an application to do some seemingly complex jobs. For example, if you were tasked with writing an application that monitored some sort of trend information such as a daily stock price, and were to alert a group of end users whenever the stock price exceeded some predetermined, agreed upon value, you could do something such as looping through a collection of users subscribing to the stock price monitoring service and direct a text message to each of these users indicating that the watched stock had surpassed the threshold value.

Also, please note that, whilst it does cost you a dime to send a message to a cell phone in this manner, it may well cost the recipient something to receive it. Bearing that in mind, as you test your version of the code, be mindful of any expenses you may be generating for yourself (if, for example, you are sending messages to yourself) or another person.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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About the Author

salysle
Software Developer (Senior)
United States United States
No Biography provided

Comments and Discussions

 
Generalmobile carriers of Pakistan Pin
Osama10015-Oct-08 22:10
MemberOsama10015-Oct-08 22:10 
GeneralI want the mobile carrier for Nigeria Pin
chikezie25-Nov-07 23:40
Memberchikezie25-Nov-07 23:40 
Generalnonetrying Pin
colliebee12-Oct-07 15:13
Membercolliebee12-Oct-07 15:13 
GeneralGood List Pin
Norberto Olazabal9-Oct-07 3:35
MemberNorberto Olazabal9-Oct-07 3:35 
QuestionHow about the list of carriers in the Philippines? Pin
ANDY@AVGTECH4-Oct-07 18:21
MemberANDY@AVGTECH4-Oct-07 18:21 
QuestionHow do we determine the mail server? Pin
Rohant Kunnat6-Jul-07 18:27
MemberRohant Kunnat6-Jul-07 18:27 
GeneralSMS Gateways should be better Pin
Vasudevan Deepak Kumar19-Jun-07 23:03
MemberVasudevan Deepak Kumar19-Jun-07 23:03 
GeneralRe: SMS Gateways should be better Pin
hulinning29-Oct-10 2:24
Memberhulinning29-Oct-10 2:24 
It is not free. I just use Google email account to send to our SMS enable clients.
QuestionInstant Messenger Pin
chse72026-Apr-07 7:02
Memberchse72026-Apr-07 7:02 
AnswerRe: Instant Messenger Pin
Vasudevan Deepak Kumar19-Jun-07 23:05
MemberVasudevan Deepak Kumar19-Jun-07 23:05 
GeneralRe: Instant Messenger Pin
chse72023-Jun-07 1:55
Memberchse72023-Jun-07 1:55 
GeneralDo you have the providers of India. Pin
albert arul prakash29-Mar-07 0:11
Memberalbert arul prakash29-Mar-07 0:11 
GeneralRe: Do you have the providers of India. Pin
salysle29-Mar-07 9:14
Membersalysle29-Mar-07 9:14 
GeneralRe: Do you have the providers of India. Pin
ANDY@AVGTECH4-Oct-07 18:16
MemberANDY@AVGTECH4-Oct-07 18:16 
GeneralRe: Do you have the providers of India. Pin
Vasudevan Deepak Kumar19-Jun-07 23:01
MemberVasudevan Deepak Kumar19-Jun-07 23:01 
Generalsi ije Pin
sabanali7-Mar-07 2:50
Membersabanali7-Mar-07 2:50 
QuestionAbout the carrier list Pin
dashing8415-Nov-06 23:28
Memberdashing8415-Nov-06 23:28 
GeneralTeleFlip Pin
DFU235-Oct-06 10:17
MemberDFU235-Oct-06 10:17 
GeneralRe: TeleFlip Pin
salysle5-Oct-06 11:15
Membersalysle5-Oct-06 11:15 
GeneralAdaptable Pin
davidmknoble4-Oct-06 9:14
Memberdavidmknoble4-Oct-06 9:14 
GeneralRe: Adaptable Pin
salysle4-Oct-06 16:51
Membersalysle4-Oct-06 16:51 
GeneralThis is Mail2SMS forwarding, not SMS sending Pin
vmihalj25-Sep-06 22:03
Membervmihalj25-Sep-06 22:03 
GeneralRe: This is Mail2SMS forwarding, not SMS sending Pin
Jasmine250116-Oct-06 12:02
MemberJasmine250116-Oct-06 12:02 
GeneralExtremely Kewl Pin
m.sherman25-Sep-06 18:42
Memberm.sherman25-Sep-06 18:42 
GeneralRe: Extremely Kewl Pin
salysle25-Sep-06 19:34
Membersalysle25-Sep-06 19:34 

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