基本信息

---

下载

   友情提示：（无需注册或充值，赞助后即可获取资源下载链接）

---

     嘿，亲！知识可是无价之宝呢，但咱这精心整理的资料也耗费了不少心血呀。小小地破费一下，绝对物超所值哦！如有下载和支付问题，请联系我们QQ(微信同号)：78630559

本次赞助数额为： 2 元　

支付宝支付

微信支付

   源码介绍

---

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace COMcommunication
{
    public partial class Form1 : Form
    {
        private SerialPort sp = new SerialPort();
        bool isHex = false; //十六进制显示标志
        bool isOpen = false; //
        bool isSetProperty = false; //属性设置标志
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            
        }

        private bool CheckSendDate() //检测发送数据是否为空
        {
            if (textBox2.Text.Trim() == "") return false;
            return true;
        }
        private void SetPortProperty() //
        {

            sp = new SerialPort();
            sp.PortName = comboBox1.Text.Trim();  //设置串口名
            sp.BaudRate = Convert.ToInt32(comboBox3.Text.Trim()); //设置串口波特率
            string f = comboBox5.Text.Trim(); //设置停止位            
            switch (f)
            {
                //case 0:
                //    sp.StopBits = StopBits.None;
                //    break;
                case "1":
                    sp.StopBits = StopBits.One;
                    break;
                //case 15:
                //    sp.StopBits = StopBits.OnePointFive;
                //    break;
                case "2":
                    sp.StopBits = StopBits.Two;
                    break;
                //default:
                //    sp.StopBits = StopBits.None;
                //    break;
            }
            sp.DataBits = Convert.ToInt16(comboBox4.Text.Trim()); //设置数据位
            string parityType = comboBox2.Text.Trim(); //设置奇偶校验
            switch (parityType)
            {
                case "无校验":
                    sp.Parity = Parity.None;
                    break;
                case "奇校验":
                    sp.Parity = Parity.Odd;
                    break;
                case "偶校验":
                    sp.Parity = Parity.Even;
                    break;
                default:
                    sp.Parity = Parity.None;
                    break;
            }
            sp.ReadTimeout = -1; //超时读取时间
            sp.RtsEnable = true; // 指示本设备准备好可接收数据
            //定义Data Received事件，当串口收到数据后出发事件
            sp.DataReceived  = new SerialDataReceivedEventHandler(sp_DataReceived);
        }
        private void sp_DataReceived(object sender, EventArgs e)
        {
            System.Threading.Thread.Sleep(100);  //延迟100ms等待接收完成数据
            this.Invoke((EventHandler)(
                delegate 
                {
                    if (isHex == false)
                    {
                       // System.Text.UTF8Encoding utf8 = new System.Text.UTF8Encoding();// 显示汉字与字符
                        Byte[] readBytes = new Byte[sp.BytesToRead];
                        sp.Read(readBytes, 0, readBytes.Length);
                        string decodedString = byteToHexStr(readBytes);//utf8.GetString(readBytes);
                        textBox1.Text  = decodedString;
                    }
                    else
                    {

                    }

                }
            ));
        }
        /// <summary>
        /// 16进制字节数组转字符串
        /// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        public static string byteToHexStr(byte[] bytes)
        {
            string returnStr = "";
            if (bytes != null)
            {
                for (int i = 0; i < bytes.Length; i  )
                {
                    returnStr  = bytes[i].ToString("X2")   ' ';
                }
            }
            return returnStr.Trim();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (isOpen == false)
            {
                //if (!CheckSendDate())  //检测串口设置
                //{
                //    MessageBox.Show("串口未设置", "错误提示");
                //    return;
                //}
                if (isSetProperty == false) // 检测
                {
                    SetPortProperty();
                    isSetProperty = true;
                }
                try //打开串口
                {
                    sp.Open();
                    isOpen = true;
                    button2.Text = "关闭串口";
                    //串口打开后相关的串口设置按钮不再可选择
                    comboBox1.Enabled = false;
                    comboBox2.Enabled = false;
                    comboBox3.Enabled = false;
                    comboBox4.Enabled = false;
                    comboBox5.Enabled = false;
                }
                catch (Exception)
                {   //失败后设置
                    isSetProperty = false;
                    isOpen = false;
                    MessageBox.Show("串口无效或已经被占用！", "错误提示");
                }
            }
            else
            {
                sp.Close();
                isOpen = false;
                isSetProperty = false;
                button2.Text = "打开串口";
                //重置选择按钮有效
                comboBox1.Enabled = true;
                comboBox2.Enabled = true;
                comboBox3.Enabled = true;
                comboBox4.Enabled = true;
                comboBox5.Enabled = true;
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            try
            {
                //System.Text.UTF8Encoding utf8 = new System.Text.UTF8Encoding();
                //byte[] writeBytes = utf8.GetBytes(textBox2.Text);

                //byte[] writeBytes11 = new Byte[data1.length]; //
                byte[] writeBytes = HexStringToBytes(textBox2.Text);
                sp.Write(writeBytes, 0, writeBytes.Length); //发送数据内容


            }
            catch (Exception)
            {
                MessageBox.Show("发送数据时发生错误！", "错误提示");
                return;

            }
        }
        //将16进制的字符转16进制的字节
        public static byte[] HexStringToBytes(string hs)
        {
            string[] strArr = hs.Trim().Split(' ');//空格分组7E 30 30 30 31 32 41 35 30 30 30 30 30 30 30 46 44 34 37 0D
            byte[] b = new byte[strArr.Length];
            //逐个字符变为16进制字节数据
            for (int i = 0; i < strArr.Length; i  )
            {
                b[i] = Convert.ToByte(strArr[i], 16);
            }
            //按照指定编码将字节数组变为字符串
            return b;
        }
    }
}