C# TCP通讯客户端源码

TCP读写器介绍：https://item.taobao.com/item.htm?spm=a1z10.5-c.w4002-17663462238.13.45d75b43xb6FYD&id=601009585329https://item.taobao.com/item.htm?spm=a1z10.5-c.w4002-17663462238.13.45d75b43xb6FYD&id=601009585329

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.Net;
using System.Net.Sockets;
using System.Threading;
using System.Management;namespace TCPIP接口读卡器C井2010例子代码
{public partial class Form8 : Form{private TcpClient tcpClient = null;private IPAddress ipaddress;int remortprot;public Boolean connok;private Thread thread;   Form1 f1;public Form8(){InitializeComponent();}private void Form8_Load(object sender, EventArgs e){f1 = (Form1)this.Owner;f1.Refresh();string connip = f1.textBox2.Text + "." + f1.textBox3.Text + "." + f1.textBox4.Text + "." + f1.textBox5.Text;ipaddress = IPAddress.Parse(connip);remortprot = Convert.ToInt32(f1.textBox8.Text);}private void button1_Click(object sender, EventArgs e){if (button1.Text == "建立与读写器的TCP连接"){try{tcpClient = new TcpClient();tcpClient.Connect(ipaddress, remortprot);       //阻塞式同步通讯工作方式        if (tcpClient.Connected){connok = true;button1.Text = "断开与读写器的TCP连接";panel1.Enabled = true;thread = new Thread(new ThreadStart(this.ReceiveHandle));thread.Start();}}catch{MessageBox.Show("TCP连接失败，请确定MODBUS TCP读写器已经开启！", "警告", MessageBoxButtons.OK, MessageBoxIcon.Error);}}else{connok = false;                button1.Text = "建立与读写器的TCP连接";panel1.Enabled = false;tcpClient.Close();}}private void ReceiveHandle(){string recestr;int i;try{while (connok){byte[] bytes = new byte[100];NetworkStream stream;stream = tcpClient.GetStream();                       //获取网络流lock (stream) ;                                       //为了保证数据的完整性以及安全性 锁定数据流int bytesRead = stream.Read(bytes, 0, bytes.Length);  //读取返回信息recestr = "FromIP：" + (ipaddress + ":" + remortprot.ToString().Trim() + "                        ").Substring(0, 22) + "电脑接收：";for (i = 0; i < bytesRead; i++){recestr = recestr + bytes[i].ToString("X2") + " ";}f1.listBox1.Items.Add(recestr);f1.listBox1.SelectedIndex = f1.listBox1.Items.Count - 1;if (bytes[0] == 0x55 && bytes.Length>11){switch (bytes[1]){case 0x05: ;DialogResult dr = MessageBox.Show("读写器已执行一次读卡操作，是否要读出寄存器内数！", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question);if (dr == DialogResult.OK){beginbuf.Value = 7;button4_Click(button4, EventArgs.Empty);}break;case 0x06: ;recestr = "";for (i = 9; i <= 9 + bytes[8];i++ ){recestr = recestr + bytes[i].ToString("X2") + " ";}textBox1.Text = recestr;break;                               case 0x08:;if (beginbuf.Value >= 10){DialogResult dr1 = MessageBox.Show("    存放IC卡扇区数据的寄存器数据更改成功，是否要驱动读卡器执行写卡操作？", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question);if (dr1 == DialogResult.OK){beginbuf.Value = 7;button5_Click(button5, EventArgs.Empty);}}break;                               }}}}catch{}}private void button32_Click(object sender, EventArgs e){byte[] sendbuf = new byte[12];sendbuf[0] = 0x55;sendbuf[1] = 0x01;sendbuf[2] = 0x00;    //MODBUS TCP协议标识sendbuf[3] = 0x00;sendbuf[4] = 0x00;sendbuf[5] = 0x06;    //指令长度sendbuf[6] = 0x00;sendbuf[7] = 0x06;    //功能码sendbuf[8] = 0x00;sendbuf[9] = 0x02;    //寄存器地址sendbuf[10] = 0x00;sendbuf[11] = (byte)(comboBox7.SelectedIndex + 1);try{NetworkStream stream;stream = tcpClient.GetStream();          //获取网络流//lock (stream) ;                           //为了保证数据的完整性以及安全性 锁定数据流stream.Write(sendbuf, 0, sendbuf.Length);//将数据写入网络流string recestr = "";recestr = "SendTo：" + (ipaddress + ":" + remortprot.ToString() .Trim() + "                        ").Substring(0, 22) + "电脑发送：";for (int i = 0; i < 12; i++){recestr = recestr + sendbuf[i].ToString("X2") + " ";}f1.listBox1.Items.Add(recestr);f1.listBox1.SelectedIndex = f1.listBox1.Items.Count - 1;}catch{connok = false;tcpClient.Close();button1.Text = "建立与读写器的TCP连接";panel1.Enabled = false;}}private void Form8_Load(){f1 = (Form1)this.Owner;f1.Refresh();string connip = f1.textBox2.Text + "." + f1.textBox3.Text + "." + f1.textBox4.Text + "." + f1.textBox5.Text;ipaddress = IPAddress.Parse(connip);remortprot = Convert.ToInt32(f1.textBox8.Text);}private void button2_Click(object sender, EventArgs e){byte[] sendbuf = new byte[12];sendbuf[0] = 0x55;sendbuf[1] = 0x02;sendbuf[2] = 0x00;    //MODBUS TCP协议标识sendbuf[3] = 0x00;sendbuf[4] = 0x00;sendbuf[5] = 0x06;    //指令长度sendbuf[6] = 0x00;sendbuf[7] = 0x06;    //功能码sendbuf[8] = 0x00;sendbuf[9] = (byte)(0x46 + comboBox8.SelectedIndex);sendbuf[10] = (byte)(swithdely.Value / 256);  //延时sendbuf[11] = (byte)(swithdely.Value % 256);try{NetworkStream stream;stream = tcpClient.GetStream();          //获取网络流lock (stream) ;                           //为了保证数据的完整性以及安全性 锁定数据流stream.Write(sendbuf, 0, sendbuf.Length);//将数据写入网络流string recestr = "";recestr = "SendTo：" + (ipaddress + ":" + remortprot.ToString().Trim() + "                        ").Substring(0, 22) + "电脑发送：";for (int i = 0; i < 12; i++){recestr = recestr + sendbuf[i].ToString("X2") + " ";}f1.listBox1.Items.Add(recestr);f1.listBox1.SelectedIndex = f1.listBox1.Items.Count - 1;}catch{connok = false;tcpClient.Close();button1.Text = "建立与读写器的TCP连接";panel1.Enabled = false;}}private void button34_Click(object sender, EventArgs e){byte[] sendbuf = new byte[12];sendbuf[0] = 0x55;sendbuf[1] = 0x03;sendbuf[2] = 0x00;    //MODBUS TCP协议标识sendbuf[3] = 0x00;sendbuf[4] = 0x00;sendbuf[5] = 0x06;    //指令长度sendbuf[6] = 0x00;sendbuf[7] = 0x06;    //功能码sendbuf[8] = 0x00;sendbuf[9] = (byte)(0x46 + comboBox8.SelectedIndex);sendbuf[10] = 0x00;   //延时sendbuf[11] = 0x00;try{NetworkStream stream;stream = tcpClient.GetStream();           //获取网络流lock (stream) ;                           //为了保证数据的完整性以及安全性 锁定数据流stream.Write(sendbuf, 0, sendbuf.Length); //将数据写入网络流string recestr = "";recestr = "SendTo：" + (ipaddress + ":" + remortprot.ToString().Trim() + "                        ").Substring(0, 22) + "电脑发送：";for (int i = 0; i < 12; i++){recestr = recestr + sendbuf[i].ToString("X2") + " ";}f1.listBox1.Items.Add(recestr);f1.listBox1.SelectedIndex = f1.listBox1.Items.Count - 1;}catch{connok = false;tcpClient.Close();button1.Text = "建立与读写器的TCP连接";panel1.Enabled = false;}}private void button35_Click(object sender, EventArgs e){byte[] sendbuf = new byte[12];sendbuf[0] = 0x55;sendbuf[1] = 0x04;sendbuf[2] = 0x00;    //MODBUS TCP协议标识sendbuf[3] = 0x00;sendbuf[4] = 0x00;sendbuf[5] = 0x06;    //指令长度sendbuf[6] = 0x00;sendbuf[7] = 0x06;    //功能码sendbuf[8] = 0x00;sendbuf[9] = 0x01;if(checkBox1.Checked ){sendbuf[10] = 0x80;sendbuf[11] = (byte)(comboBox9.SelectedIndex + 2 * comboBox10.SelectedIndex);}else{sendbuf[10] = 0x00;sendbuf[11] = (byte)(comboBox9.SelectedIndex + 2 * comboBox10.SelectedIndex);}try{NetworkStream stream;stream = tcpClient.GetStream();           //获取网络流lock (stream) ;                           //为了保证数据的完整性以及安全性 锁定数据流stream.Write(sendbuf, 0, sendbuf.Length); //将数据写入网络流string recestr = "";recestr = "SendTo：" + (ipaddress + ":" + remortprot.ToString().Trim() + "                        ").Substring(0, 22) + "电脑发送：";for (int i = 0; i < 12; i++){recestr = recestr + sendbuf[i].ToString("X2") + " ";}f1.listBox1.Items.Add(recestr);f1.listBox1.SelectedIndex = f1.listBox1.Items.Count - 1;}catch{connok = false;tcpClient.Close();button1.Text = "建立与读写器的TCP连接";panel1.Enabled = false;}}private void button3_Click(object sender, EventArgs e){byte[] sendbuf = new byte[12];sendbuf[0] = 0x55;sendbuf[1] = 0x05;sendbuf[2] = 0x00;    //MODBUS TCP协议标识sendbuf[3] = 0x00;sendbuf[4] = 0x00;sendbuf[5] = 0x06;    //指令长度sendbuf[6] = 0x00;sendbuf[7] = 0x06;    //功能码sendbuf[8] = 0x00;sendbuf[9] = 0x07;sendbuf[10] = 0x00;sendbuf[11] = 0x08;try{NetworkStream stream;stream = tcpClient.GetStream();          //获取网络流lock (stream) ;                           //为了保证数据的完整性以及安全性 锁定数据流stream.Write(sendbuf, 0, sendbuf.Length);//将数据写入网络流string recestr = "";recestr = "SendTo：" + (ipaddress + ":" + remortprot.ToString().Trim() + "                        ").Substring(0, 22) + "电脑发送：";for (int i = 0; i < 12; i++){recestr = recestr + sendbuf[i].ToString("X2") + " ";}f1.listBox1.Items.Add(recestr);f1.listBox1.SelectedIndex = f1.listBox1.Items.Count - 1;}catch{connok = false;tcpClient.Close();button1.Text = "建立与读写器的TCP连接";panel1.Enabled = false;}}private void button4_Click(object sender, EventArgs e){byte[] sendbuf = new byte[12];sendbuf[0] = 0x55;sendbuf[1] = 0x06;sendbuf[2] = 0x00;    //MODBUS TCP协议标识sendbuf[3] = 0x00;sendbuf[4] = 0x00;sendbuf[5] = 0x06;    //指令长度sendbuf[6] = 0x00;sendbuf[7] = 0x03;    //功能码sendbuf[8] = 0x00;sendbuf[9] = (byte)beginbuf.Value ;sendbuf[10] = 0x00;sendbuf[11] = (byte)bufnum.Value ;try{NetworkStream stream;stream = tcpClient.GetStream();          //获取网络流lock (stream) ;                           //为了保证数据的完整性以及安全性 锁定数据流stream.Write(sendbuf, 0, sendbuf.Length);//将数据写入网络流string recestr = "";recestr = "SendTo：" + (ipaddress + ":" + remortprot.ToString().Trim() + "                        ").Substring(0, 22) + "电脑发送：";for (int i = 0; i < 12; i++){recestr = recestr + sendbuf[i].ToString("X2") + " ";}f1.listBox1.Items.Add(recestr);f1.listBox1.SelectedIndex = f1.listBox1.Items.Count - 1;}catch{connok = false;tcpClient.Close();button1.Text = "建立与读写器的TCP连接";panel1.Enabled = false;}}private void button7_Click(object sender, EventArgs e){byte wrib1;byte wrib2;string wreitstr = textBox1.Text.Trim();try{wrib1 = Convert.ToByte(Convert.ToInt32(wreitstr.Substring(0, 2), 16));wrib2 = Convert.ToByte(Convert.ToInt32(wreitstr.Substring(3, 2), 16));}catch (Exception ex){MessageBox.Show("请在右边栏中输入要写入的16进制数据！", "警告", MessageBoxButtons.OK, MessageBoxIcon.Error);return;}byte[] sendbuf = new byte[12];sendbuf[0] = 0x55;sendbuf[1] = 0x07;sendbuf[2] = 0x00;    //MODBUS TCP协议标识sendbuf[3] = 0x00;sendbuf[4] = 0x00;sendbuf[5] = 0x06;    //指令长度sendbuf[6] = 0x00;sendbuf[7] = 0x06;    //功能码sendbuf[8] = 0x00;sendbuf[9] = (byte)beginbuf.Value;sendbuf[10] = wrib1;sendbuf[11] = wrib2;try{NetworkStream stream;stream = tcpClient.GetStream();          //获取网络流lock (stream) ;                           //为了保证数据的完整性以及安全性 锁定数据流stream.Write(sendbuf, 0, sendbuf.Length);//将数据写入网络流string recestr = "";recestr = "SendTo：" + (ipaddress + ":" + remortprot.ToString().Trim() + "                        ").Substring(0, 22) + "电脑发送：";for (int i = 0; i < 12; i++){recestr = recestr + sendbuf[i].ToString("X2") + " ";}f1.listBox1.Items.Add(recestr);f1.listBox1.SelectedIndex = f1.listBox1.Items.Count - 1;}catch{connok = false;tcpClient.Close();button1.Text = "建立与读写器的TCP连接";panel1.Enabled = false;}}private void button6_Click(object sender, EventArgs e){byte[] Writbuf = new byte[48];int WritNum =(int)(bufnum.Value * 2);int i;string wreitstr = textBox1.Text.Trim();try{for (i = 0; i < WritNum;i++ ){Writbuf[i] = Convert.ToByte(Convert.ToInt32(wreitstr.Substring(i*3, 2), 16));}}catch (Exception ex){MessageBox.Show("请在右边栏中输入要写入的16进制数据，每个寄存器要写入2个字节数据！", "警告", MessageBoxButtons.OK, MessageBoxIcon.Error);return;}byte[] sendbuf = new byte[WritNum+13];sendbuf[0] = 0x55;sendbuf[1] = 0x08;sendbuf[2] = 0x00;    //MODBUS TCP协议标识sendbuf[3] = 0x00;sendbuf[4] = 0x00;sendbuf[5] = 0x06;    //指令长度sendbuf[6] = 0x00;sendbuf[7] = 0x10;    //功能码sendbuf[8] = 0x00;sendbuf[9] = (byte)beginbuf.Value;sendbuf[10] = 0x00;sendbuf[11] = (byte)bufnum.Value;sendbuf[12] = (byte)WritNum;for (i = 1; i <= WritNum; i++){sendbuf[12 + i] = Writbuf[i - 1];}try{NetworkStream stream;stream = tcpClient.GetStream();          //获取网络流lock (stream) ;                           //为了保证数据的完整性以及安全性 锁定数据流stream.Write(sendbuf, 0, sendbuf.Length);//将数据写入网络流string recestr = "";recestr = "SendTo：" + (ipaddress + ":" + remortprot.ToString().Trim() + "                        ").Substring(0, 22) + "电脑发送：";for (i = 0; i <= 12 + WritNum; i++){recestr = recestr + sendbuf[i].ToString("X2") + " ";}f1.listBox1.Items.Add(recestr);f1.listBox1.SelectedIndex = f1.listBox1.Items.Count - 1;}catch{connok = false;tcpClient.Close();button1.Text = "建立与读写器的TCP连接";panel1.Enabled = false;}}private void button5_Click(object sender, EventArgs e){byte[] sendbuf = new byte[12];sendbuf[0] = 0x55;sendbuf[1] = 0x09;sendbuf[2] = 0x00;    //MODBUS TCP协议标识sendbuf[3] = 0x00;sendbuf[4] = 0x00;sendbuf[5] = 0x06;    //指令长度sendbuf[6] = 0x00;sendbuf[7] = 0x06;    //功能码sendbuf[8] = 0x00;sendbuf[9] = 0x07;sendbuf[10] = 0x00;sendbuf[11] = 0x04;try{NetworkStream stream;stream = tcpClient.GetStream();          //获取网络流lock (stream) ;                           //为了保证数据的完整性以及安全性 锁定数据流stream.Write(sendbuf, 0, sendbuf.Length);//将数据写入网络流string recestr = "";recestr = "SendTo：" + (ipaddress + ":" + remortprot.ToString().Trim() + "                        ").Substring(0, 22) + "电脑发送：";for (int i = 0; i < 12; i++){recestr = recestr + sendbuf[i].ToString("X2") + " ";}f1.listBox1.Items.Add(recestr);f1.listBox1.SelectedIndex = f1.listBox1.Items.Count - 1;}catch{connok = false;tcpClient.Close();button1.Text = "建立与读写器的TCP连接";panel1.Enabled = false;}}    }
}

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