Send Message To Specific Client By Selecting Number In ComboBox

[haanjae]

I want to send a private message to particular client by selecting number in comboBox. but had tried to code it but message still receive at every clients that connected to server. i want to send the message using the worker socket object stored in ArrayList, but don't know how to get it correct.
Any help will be appreciated, thanks.

void indmsgbtn_Click(object sender, EventArgs e)
 {
     try
     {
         string msg = richtxtindmsg.Text;
         msg = "Private Admin Message: " + msg + "\n";
         byte[] byData = System.Text.Encoding.ASCII.GetBytes(msg);
         Socket workerSocket = null;
         Convert.ToInt32(comboBox1.SelectedItem);
         
         if (comboBox1.SelectedIndex != 0)
         {
             MessageBox.Show("Please Choose a Connected User no.");
             return;
         }
         for (int i = 0; i < m_workerSocketList.Count; i++)
         {
             comboBox1.SelectedItem = m_workerSocketList[i];
            // workerSocket = (Socket)m_workerSocketList[i];
             if (workerSocket != null)
             {
                 if (workerSocket.Connected)
                 {
                     workerSocket.Send(byData);
                 }
             }
         }  
     }
     catch (SocketException se)
     {
         MessageBox.Show(se.Message);
     }
 }

[Paul Johnson]

You might want to include a UID onto the message or send it to a specific IP address.

[haanjae]

thanks for reply. ya, that is why i want to use the number 1 until 9 in combobox to match the ID of client, but don't know how to code it correctly.

[haanjae]

update:
i tried to modify the codes again, but still have problem, still unable to send private message to selected client number number.
i already set that client number will be added in the comboBox each time each client connect to server.

        void indmsgbtn_Click(object sender, EventArgs e)
        {
            try
            {
  
                string msg = richtxtindmsg.Text;
                msg = "Private Admin Message: " + msg + "\n";
                byte[] byData = System.Text.Encoding.ASCII.GetBytes(msg);
                Socket workerSocket = null;
                for (int i = 0; i < m_workerSocketList.Count; i++)
                {
                   // workerSocket = (Socket)m_workerSocketList[i]; 
              //this is the code that allow send message to all the client that connected

                    comboBox1.SelectedItem == m_workerSocketList[i];
                    if (workerSocket != null)
                    {
                        if (workerSocket.Connected)
                        {
                            workerSocket.Send(byData);
                        }
                    }
                }
            }
            catch (SocketException se)
            {
                MessageBox.Show(se.Message);
            }
        }