Caller ID - Cannot obtain incoming Number
<p>The Label on the UI keeps reading "RING RING" and then back to empty "". It doesn't however display the incoming number, which is what I want. I tried to add an if function checking if there is a '0' in the data but that for some reason still doesn't work. </p>

<p>The following is my code:</p>

<pre><code>using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO.Ports;

namespace CallerID
{
    public partial class CallerID : Form
    {
        public CallerID()
        {
            InitializeComponent();
            port.Open();
            WatchModem();
            SetModem();
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            WatchModem();
        }

        private SerialPort port = new SerialPort("COM3");
        string CallName;
        string CallNumber;
        string ReadData;

        private void SetModem()
        {
            port.WriteLine("AT+VCID=1\n");
            port.RtsEnable = true;
        }

        private void WatchModem()
        {
            port.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived);
        }

        public delegate void SetCallerIdText();

        private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            ReadData = port.ReadExisting();
            //Add code to split up/decode the incoming data
            if (lblCallerIDTitle.InvokeRequired)
            {
                if (ReadData.Contains('0'))
                    lblCallerIDTitle.Invoke(new SetCallerIdText(() =&gt; lblCallerIDTitle.Text = ReadData));
            }
            else
                lblCallerIDTitle.Text = ReadData;
        }
    }
}
</code></pre>
