communication problem in RS232

See more:

C#

GoodMorning;I'm working on an application in C # that makes the communication between a temperature controller and a PC via RS232, I need to read the address and the current temperature regulator for that I developed a code to respond to this but I have a load probleme.When I want to read two values or more at the same time this is virtually impossible because he can only read a single value in the time .And when I want to use values stored in a database given as the address, the program runs the database several times but resend to me only the first element to the serial port and get blocked after.
Help me please because I'm really blocked.
Thank you very much
*this is a part of my concerned 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.Collections;
using System.Data.SqlClient;
using System.IO.Ports;
namespace projet
{
    public partial class Form1 : Form
    {
        Motdepasse motdepasse = new Motdepasse();
 
        Configuration conf = new Configuration();
      
        int[] nb_preced = new int[100];
        static int nbr_it = 0;
           public static int adresse_courant = 0;
        static bool bTimeOutInterCar = false;
        static int k, l=0, m, p;
        //string EtuveASupprimer;
        ListViewItem[] it = new ListViewItem[100];
        string RxString = "";
        string x;
        public Form1()
        {
            InitializeComponent();
            configPort();
            //InitializeTimerScrutation();
            this.listView1.FullRowSelect = true;     // Select the item and subitems when selection is made.
             nbr_it = 0;
            charger_listView();
            //adressetuve();
             //Etuve_OFF();
             timerhour.Start();
            try
            {
                
               InitializeMyTimer();
            
            }
            catch (Exception Er) { MessageBox.Show("Erreur " + Er.Message); }
           
        }
        private void quitterToolStripMenuItem_Click(object sender, EventArgs e)
        {
                              this.Close();
             }
        private void communicationPortToolStripMenuItem_Click(object sender, EventArgs e)
        {
          
            timer2.Stop();
            if (serialPort.IsOpen) serialPort.Close();
            Configuration f = new Configuration();
            f.ShowDialog();
            //adressetuve();
            timer2.Start();
       }
        public void charger_listView()
        {
            StringBuilder ligne1 = new StringBuilder();
            StringBuilder ligne2 = new StringBuilder();
            try
            {
                Program.connexion.Open();
                string mySelectQuery = "SELECT Label,Adresse FROM Oven order by Label";
                SqlCommand myCommand = new SqlCommand(mySelectQuery, Program.connexion);
                SqlDataReader myReader = myCommand.ExecuteReader();
                while (myReader.Read())
                {
                    ligne1 = new StringBuilder();
                   ligne2 = new StringBuilder();
                    for (int i = 0; i < myReader.FieldCount; i += 2)
                    {
                        ligne1.Append(myReader[i].ToString());
                       ligne2.Append(myReader[i + 1].ToString());
                        it[nbr_it] = new ListViewItem();
                        it[nbr_it].Text = ligne1.ToString();
                        it[nbr_it].SubItems.Add(ligne2.ToString());
                        it[nbr_it].SubItems.Add("NC");
                     
                        this.it[nbr_it].SubItems[0].ForeColor = Color.Red;
                        this.listView1.Items.Add(it[nbr_it]);
                       nbr_it++;
                    }
                }
                myReader.Close();
            }
            catch (Exception z) { MessageBox.Show(z.ToString()); }
            Program.connexion.Close();
                       
        }
        private void timerhour_Tick(object sender, EventArgs e)
        {
            DateTime DateNow = DateTime.Now;
            THour.Text = DateNow.Hour.ToString("d2") + ":" + DateNow.Minute.ToString("d2") + ":" + DateNow.Second.ToString("d2");
           
        }
        private void InitializeMyTimer()
        {
            // Set the interval for the timer.
            timer1.Interval = 1000;
            // Connect the Tick event of the timer to its event handler.
            //timer1.Tick += new EventHandler(IncreaseProgressBar);
            timer1.Tick += new EventHandler(timer1_Tick);
            // Start the timer.
            timer1.Start();
        }
        private void DisplayData2(string msg)
        {
            lread.Invoke(new EventHandler(delegate
            {
    
               // textBox1.Text = msg;
                lread.Text = msg;
  
            }));
        }
        private void DisplayData1(string msg)
        {
            area.Invoke(new EventHandler(delegate
            {
               area.Text = msg;
                        }));
        }
        private byte[] HexToByte(string msg)
        {
           msg = msg.Replace(" ", "");
          
            byte[] comBuffer = new byte[msg.Length / 2];
            opert.Text = msg.Length.ToString();
          
            for (int i = 0; i < msg.Length; i += 2)
       
                comBuffer[i / 2] = (byte)Convert.ToByte(msg.Substring(i, 2), 16);
     
            //
            return comBuffer;
        }
        private void serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            byte[] comBuffer = new byte[300];
           serialPort.Read(comBuffer, 0, comBuffer.Length);
          
            string s1 = Encoding.ASCII.GetString(comBuffer);
            StringBuilder st1 = new StringBuilder(s1, 50);
  
            ArrayList trame1 = new ArrayList(50);
           //trame1.Add(st1);
            //trame.Clear();
            trame1.Add(st1[0]);
            trame1.Add(st1[1]);
            trame1.Add(st1[2]);
            trame1.Add(st1[3]);
            trame1.Add(st1[4]);
            trame1.Add(st1[5]);
            trame1.Add(st1[6]);
            //trame1.Add(st1[7]);
          
            String sList1 = "";
            int i = 0;
            for (i = 1; i < trame1.Count; i++)
            {
                sList1 += trame1[i];
              
                //sList1 = "";
            }
         
            try
            {
                if (double.Parse(sList1) - double.Parse(sList1) == 0)
                {
                    //Substring(0, 2)
                    try
                    {
                        SqlCommand myCommand = new SqlCommand("UPDATE Oven SET Area = '" + sList1.Substring(0, 2) + "',Operation = '" + sList1.Substring(2, 4) + "'WHERE Adresse = " + double.Parse(sList1.Substring(0, 2)) + "", Program.connexion);
                        
                        Program.connexion.Open();
                        myCommand.ExecuteNonQuery();
                    }
                    catch (Exception z) { MessageBox.Show(z.ToString()); }
                    Program.connexion.Close();
                    DisplayData2(sList1);
                   DisplayData1(sList1.Substring(2, 4));
                    x = sList1.Substring(0, 2);
                   
                }
            }
            catch (Exception)
            { }
            //string y = sList1;
            //textBox3.Text = y;
            }
        private void timer1_Tick(object sender, EventArgs e)
        {
         //if (serialPort.IsOpen == false) serialPort.Open();
           // configPort();
            //now open the port
    // lectur("20");
      //adressetuve();
            Program.connexion.Open();
                SqlCommand commande = new SqlCommand("select Adresse from Oven", Program.connexion);
                SqlDataReader reader = commande.ExecuteReader();
                while (reader.Read())
                {   
                    //lectur(reader[0].ToString());
                    System.Threading.Thread.Sleep(1000);
                  textBox3.Text += reader[0].ToString();
                  System.Threading.Thread.Sleep(100);
                }
                reader.Close();
         
            Program.connexion.Close();
            
       for (int i = 0; i < listView1.Items.Count; i++)
       { 
//           //System.Threading.Thread.Sleep(1000);
//           lectur(it[i].SubItems[1].Text.ToString());
        
       if (x == it[i].SubItems[1].Text)
       {it[i].SubItems[2].Text = ("OFF");
           this.it[i].SubItems[0].ForeColor = Color.Cyan;
       }
       else
       {
           it[i].SubItems[2].Text = ("NC");
           this.it[i].SubItems[0].ForeColor = Color.Green;
       }
//            //test(it[i].SubItems[1].Text);
//          textBox2.Text += it[i].SubItems[1].Text;
}
}
    
       
        private void initialiszTimer2()
        {
            timer2.Interval = 1000;
            timer2.Tick += new EventHandler(timer2_Tick);
            timer2.Start();// Start the timer.
        }
        private void timer2_Tick(object sender, EventArgs e)
        {
            if (serialPort.IsOpen == false) serialPort.Open();
           // configPort();
            //now open the port
            byte[] newMsg = new byte[20];
           
            try
            {
               
            }
            catch (FormatException)
            {
              
            }
         
        }
        public void ecrire(string adresse, string consigne)
        {
            uint bcc = 0;
            ArrayList trame_ecriture = new ArrayList();
            ArrayList Adr = new ArrayList();
            ArrayList Consigne = new ArrayList();
            StringBuilder adr = new StringBuilder(adresse);
            StringBuilder cons = new StringBuilder(consigne);
            for (int s = 0; s < adresse.Length; s++)
            {
                if (adresse.Length == 1) { Adr.Add(48); Adr.Add(48); }
                Adr.Add(Convert.ToInt32(adr[s]));
                Adr.Add(Convert.ToInt32(adr[s]));
            }
            for (int s = 0; s < consigne.Length; s++)
            {
                Consigne.Add(Convert.ToInt32(cons[s]));
            }
            trame_ecriture.Add(4);
            trame_ecriture.AddRange(Adr);
            trame_ecriture.Add(2);
            trame_ecriture.Add(83);
            trame_ecriture.Add(76);
            trame_ecriture.AddRange(Consigne);
            trame_ecriture.Add(46);
            trame_ecriture.Add(48);
            trame_ecriture.Add(3);
            for (int s = 6; s < trame_ecriture.Count; s++)
            {
                bcc = bcc ^ Convert.ToUInt32(trame_ecriture[s]);
            }
            trame_ecriture.Add(bcc);
            envoie(trame_ecriture);
        }
         public void lectur(string adresse)
        {
           
            ArrayList trame_ecriture = new ArrayList();
            ArrayList Adr = new ArrayList();
            
            StringBuilder adr = new StringBuilder(adresse);
          
            for (int s = 0; s < adresse.Length; s++)
            {
                if (adresse.Length == 1) { Adr.Add(30); Adr.Add(30); }
                //Adr.Add(Convert.ToInt32(adr[s]).ToString());
                Adr.Add(Convert.ToString(adr[s],16));
                Adr.Add(" ");
                Adr.Add(Convert.ToString(adr[s],16));
               Adr.Add(" ");
            }
        
            trame_ecriture.Add("04");
            trame_ecriture.Add(" ");
            trame_ecriture.AddRange(Adr);
            trame_ecriture.Add(" ");
            trame_ecriture.Add("50");
            trame_ecriture.Add(" ");
            trame_ecriture.Add("56");
            trame_ecriture.Add(" ");
            trame_ecriture.Add("05");
            trame_ecriture.Add(" ");
            int i = 0;
            string List = "";
            for (i = 0; i < trame_ecriture.Count-1; i++)
            {
                List += trame_ecriture[i];
            }
            //
         textBox1.Text = List;
         //
            if (serialPort.IsOpen == false) serialPort.Open();
            byte[] newMsg1 = new byte[20];
            try
            {
                //convert the message to byte array
                newMsg1 = HexToByte(List);
                //opert.Text = newMsg1.ToString();
                //send the message to the port
                serialPort.Write(newMsg1, 0, newMsg1.Length);
            
            }
            catch (FormatException)
            {
            }
        }
        
        public void adressetuve()
        {
            try
            {
                Program.connexion.Open();
                SqlCommand commande = new SqlCommand("select Adresse,Temperat_Con_1 from Oven", Program.connexion);
                SqlDataReader reader = commande.ExecuteReader();
                while (reader.Read())
                {
                    lectur(reader[0].ToString());
                }
                reader.Close();
            }
            catch (Exception z) { MessageBox.Show(z.ToString()); }
            Program.connexion.Close();
    
        }
        public void envoie(ArrayList liste)
        {
            if (serialPort.IsOpen == false) serialPort.Open();
            Byte[] T = new Byte[liste.Count];
            for (int s = 0; s < T.Length; s++)
            {
                T[s] = Convert.ToByte(liste[s]);
            }
            serialPort.Write(T, 0, T.Length);
            serialPort.Close();
        }
       
 
    }