I want send bulk sms

Question

1.50/5 (2 votes)

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I want to send bulk sms using usb modem.I like to load numbers to textbox and and then send to all numbers.I coded to send single sms at a time.Main thing is to send bulk sms.
I need to remove white spaces and select numbers separately and send send same sms to all of them.

This is the code I wrote to send single sms mobno,msg are text boxes:

C#

private void button1_Click(object sender, EventArgs e)
{
    try {

        SmsSubmitPdu pdu;
        byte dcs = (byte)DataCodingScheme.GeneralCoding.Alpha7BitDefault;
        pdu = new SmsSubmitPdu(msg.Text, mobno.Text, dcs);
        int times = 1;
        for (int i = 0; i < times; i++)
        {
            comm.SendMessage(pdu);
        }

        MessageBox.Show("Message sent sucessfully");
    } catch (Exception ex) {
        MessageBox.Show("Modem not avaliable");
    }


}

here is my modem loading concept:

C#

      private GsmCommMain comm;
     private delegate void SetTextCallback(string text);
     private SmsServer smsServer;

     TextBox txtmsg = new TextBox();
     TextBox txtno = new TextBox();


     private void button3_Click(object sender, EventArgs e)
     {
         if (comboBox1.Text == "")
         {
             MessageBox.Show("Invalied Port Name");
             return;
         }
         comm = new GsmCommMain(comboBox1.Text, 9600, 150);
         Cursor.Current = Cursors.Default;
         bool retry;
         do
         {
             retry = false;
             try
             {
                 Cursor.Current = Cursors.WaitCursor;
                 comm.Open();
                 Cursor.Current = Cursors.Default;
                 MessageBox.Show("Connect Successfully");
             }
             catch (Exception)
             {
                 Cursor.Current = Cursors.Default;
                 if (MessageBox.Show(this, "Modem not available", "Check", MessageBoxButtons.RetryCancel, MessageBoxIcon.Warning) == DialogResult.Retry) retry = true;
                 { return; }
             }
         } while (retry);
     }

     private void sms_Load(object sender, EventArgs e)
     {
         comboBox1.Items.Add("Com1");
         comboBox1.Items.Add("Com2");
         comboBox1.Items.Add("Com3");
         comboBox1.Items.Add("Com4");
         comboBox2.Items.Add("Com1");
         comboBox2.Items.Add("Com2");
         comboBox2.Items.Add("Com3");
         comboBox2.Items.Add("Com4");

}

Posted 13-Jan-16 21:41pm

tharukanc

Updated 13-Jan-16 23:07pm

F-ES Sitecore

v2

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Comments

OriginalGriff 14-Jan-16 4:10am

And?
What is the problem?

Afzaal Ahmad Zeeshan 14-Jan-16 5:36am

Bulk SMS is the problem. :laugh:

OriginalGriff 14-Jan-16 5:40am

:laugh:
Does sound like he wants to be a spammer, doesn't it?
But there may be a legitimate reason. Doubtful, but possible!

tharukanc 14-Jan-16 6:28am

not be a spammer man!making a database program for a company they said they want to send sms to their employees

OriginalGriff 14-Jan-16 6:37am

So what is the problem?
Where are you stuck?

tharukanc 15-Jan-16 0:51am

I can't separate numbers in the textbox and send sms

OriginalGriff 15-Jan-16 4:12am

How is the textbox organised?
Is it multiline and the numbers each on separate lines, or is are they separated by semicolons, or what?

tharukanc 17-Jan-16 11:28am

for each line one number

3 solutions

Solution 1

Why are you using a modem? If you're trying to perform SMS on the cheap, search email to text - Google Search[^]. Basically send an email to a SMS gateway that consists of <phonenumber>@<emailgateway>. Each major cell provider has one of these. The major drawback is not being able to receive replies.

Or if you're preforming the work for a company like you suggest, then they should be able to put a little money towards the project. Companies like Twilio - APIs for Text Messaging, VoIP & Voice in the Cloud[^] provide amazing .NET APIs for sending and receiving SMS messages along with multi-media messages.

I don't work for Twilio, but I use their SMS service for a website I run and it is amazing and cheap enough for a personal project.

Hogan

Posted 14-Jan-16 2:47am

snorkie

Solution 3

"How is the textbox organised?
Is it multiline and the numbers each on separate lines, or is are they separated by semicolons, or what?"

tharukanc 22 mins ago
"for each line one number"

Then they are already separated: a multiline TextBox has a Lines property which returns each separate line as a single string within an array:

C#

string[] numbers = myTextBox.Lines;

You can use a simple foreach loop to process each of them, and removing spaces for each is trivial:

C#

foreach (string line in numbers)
   {
   string number = line.Replace(" ", "");
   ... send SMS to number using your working code.
   }

Posted 17-Jan-16 5:56am

OriginalGriff

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yourfriendaks · Accepted Answer · 2016-01-14T20:47:00

Try this.

mono.Text should contains all numbers with whitespace separation.

C#

private void button1_Click(object sender, EventArgs e)
{
    try {
          foreach(string varMobNo in mono.Text.split(' '))
           {
 
            SmsSubmitPdu pdu;
            byte dcs = (byte)DataCodingScheme.GeneralCoding.Alpha7BitDefault;
            pdu = new SmsSubmitPdu(msg.Text, varMobNo , dcs);
            int times = 1;
            for (int i = 0; i < times; i++)
            {
              comm.SendMessage(pdu);
            }
            }
        MessageBox.Show("Message sent sucessfully");
    } catch (Exception ex) {
        MessageBox.Show("Modem not avaliable");
    }
 

}