Hardware Interfacing C#, Serial Port Communication with Hankshake / Flow Control in C#

In this post I will describe how can we use System.IO.Ports class to listen data coming from external hardware devices, In my next post I will describe how to send data to external devices via serial port or USB.

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 ComPortListener

{

    public partial class Form1 : Form

    {

       

      //Creating newSerial Port Object

        private SerialPort port = new SerialPort();

      // String container for data

        List<String> messages= new List<String>();

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

             try

            {

                /*

                  GUI oprations, getting data from GUI and setting it into SerialPort object

                  */   

                button2.Enabled = true;

                button1.Enabled = false;

                  // Setting Form GUI values into SerialPort object    

                port.PortName = TxtPortName.Text.ToString();

                port.BaudRate = Convert.ToInt16(TxtbaudRate.Text.ToString());

                port.Parity = (Parity)ComboParity.SelectedIndex;

                port.DataBits = Convert.ToInt16(TxtDataBits.Text.ToString());

                port.StopBits = (StopBits)(ComboStopBits.SelectedIndex);

                 

                  //Setting flow control or handshake

                port.Handshake = (Handshake)(comboFlowControl.SelectedIndex);

                port.Open();

               

            }

            catch (Exception ex)

            {

         MessageBox.Show("Port Already open or some other error preventing opening             port");

                button2.Enabled = false;

                button1.Enabled = true;

            }

        }

        private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)

        {

           

            string dataReceived =port.ReadExisting();

            ListBoxInComingData.Items.Add(dataReceived);

        

        }

        void processHeader(String dataReceive)

        {

            RecID = dataReceive.Substring(29, 15).Trim();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            button2.Enabled = false;

            ComboParity.SelectedIndex = 1;

            ComboStopBits.SelectedIndex = 1;

            comboFlowControl.SelectedIndex = 0;

            ListBox.CheckForIllegalCrossThreadCalls = false;

            port.DataReceived += new  SerialDataReceivedEventHandler(port_DataReceived);

        }

        private void button2_Click(object sender, EventArgs e)

        {

            port.Close();

           

            button1.Enabled = true;

            button2.Enabled = false;

        }

    

    }

}

Download Code Here(Password:"asadyousufi.blogspot.com") 

http://www.filefactory.com/file/a1c4763/n/ComportListner_Blogger.rar

Direct Download Link