using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.IO.Ports;

using System.Collections;

using System.Threading;

using System.Timers;

using System.Xml;

using System.Runtime.InteropServices;

using System.Data.SqlClient;

using System.Configuration;



namespace 串口通信

{

    public partial class Form1 : Form

    {

        public bool isFirstTimeToStart = true;

        private int timeStamp = 50;



        public Form1()

        {   

            InitializeComponent();   

        }

        /// <summary>

        /// 初始化串口属性

        /// </summary>

        public void InitializeSerialPort()

        {

            if (isFirstTimeToStart == true)

            {

                port.DataBits = 8;

                port.PortName = ConfigurationManager.AppSettings["port"].ToString();

                port.BaudRate = 19200;

                port.DiscardNull = false;

                port.DtrEnable = false;

                port.Handshake = Handshake.None;

                port.Parity = Parity.None;

                port.ParityReplace = Convert.ToByte("63");

                port.RtsEnable = false;

                port.StopBits = StopBits.One;

                isFirstTimeToStart = false;

            }

        }



        private void comboBox1_DropDown(object sender, EventArgs e)

        {

            ///加载计算机上所有的COM串口

            comboBox1.Items.Clear();

 &