新手 求C# 的MODBUS TCP 源码

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Net;using System.Net.Sockets;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace WinFormsApp1{ public partial class Form1 : Form { public static Socket ClientSocket; public static string IP = "192.168.0.200"; public static int port = 8899; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { } private void SocketSendMessage(string CMD) { IPAddress ip = IPAddress.Parse(IP); //将IP地址字符串转换成IPAddress实例 ClientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//使用指定的地址簇协议、套接字类型和通信协议 IPEndPoint endPoint = new IPEndPoint(ip, port); // 用指定的ip和端口号初始化IPEndPoint实例 ClientSocket.Connect(endPoint); //与远程主机建立连接 byte[] message = HexStrTobyte(CMD); ClientSocket.Send(message); byte[] receive = new byte[message.Length]; int length = ClientSocket.Receive(receive); // length 接收字节数组长度 richTextBox1.Text = DateTime.Now.ToString("HH:mm:ss") + ":" + byteToHexStr(receive)+"\n" + richTextBox1.Text; ClientSocket.Close(); //关闭连接 } private static byte[] HexStrTobyte(string hexString) { hexString = hexString.Replace(" ", ""); if ((hexString.Length % 2) != 0) hexString += " "; byte[] returnBytes = new byte[hexString.Length / 2]; for (int i = 0; i < returnBytes.Length; i++) returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2).Trim(), 16); return returnBytes; } // 字节数组转16进制字符串 public static string byteToHexStr(byte[] bytes) { string returnStr = ""; if (bytes != null) { for (int i = 0; i < bytes.Length; i++) { returnStr = returnStr+" "+ bytes[i].ToString("X2");//ToString("X2") 为C#中的字符串格式控制符 } } return returnStr; } private void button1_Click(object sender, EventArgs e) { SocketSendMessage("01 06 00 00 00 01 48 0A"); } private void button2_Click(object sender, EventArgs e) { SocketSendMessage("01 06 00 00 00 00 89 CA"); } private void button4_Click(object sender, EventArgs e) { SocketSendMessage("01 06 00 01 00 01 19 CA"); } private void button3_Click(object sender, EventArgs e) { SocketSendMessage("01 06 00 01 00 00 D8 0A"); } private void button6_Click(object sender, EventArgs e) { SocketSendMessage("01 06 00 02 00 01 E9 CA"); } private void button5_Click(object sender, EventArgs e) { SocketSendMessage("01 06 00 02 00 00 28 0A"); } private void button8_Click(object sender, EventArgs e) { SocketSendMessage("01 06 00 03 00 01 B8 0A"); } private void button7_Click(object sender, EventArgs e) { SocketSendMessage("01 06 00 03 00 00 79 CA"); } private void button9_Click(object sender, EventArgs e) { } private void button10_Click(object sender, EventArgs e) { } private void button9_Click_1(object sender, EventArgs e) { richTextBox1.Text = ""; } }}