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C#用Socket实现TCP客户端

news 2025/7/9 5:37:32

1、TCP客户端实现代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;namespace PtLib.TcpClient
{public delegate void TcpClientReceivedEventHandler(TcpClientStateEventArgs args);public class TcpClient{//接收委托public event TcpClientReceivedEventHandler TcpReceived;//private string _ip = "127.0.0.1";//private int _port = 8080;//Socket socket = null;//Thread thread = null;/// <summary>/// /// </summary>/// <param name="ip"></param>/// <param name="port"></param>public TcpClient(string ip,int port) { _ip = ip;_port = port;}/// <summary>/// /// </summary>public void Open(){socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);IPEndPoint endPoint=new IPEndPoint(IPAddress.Parse(_ip), _port);socket.Connect(endPoint);thread = new Thread(Receiver);thread.IsBackground = true;thread.Start();}private void Receiver(){while (true){byte[] buffer = new byte[1024*1024];int length = socket.Receive(buffer);if(length > 0){byte[] b = new byte[length];Buffer.BlockCopy(buffer, 0, b, 0, length);TcpClientStateEventArgs args = new TcpClientStateEventArgs();args.buffer = b;TcpReceived?.Invoke(args);}}}public void Send(byte[] data){socket.Send(data);}/// <summary>/// /// </summary>public void Close() {socket?.Close();thread?.Abort();socket = null;thread = null;}}/// <summary>/// Tcp状态事件参数类/// </summary>public class TcpClientStateEventArgs : EventArgs{public byte[] buffer = null;}
}

2、应用程序

using PtLib.TcpServer;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;namespace TcpClient
{public partial class Form1 : Form{PtLib.TcpClient.TcpClient tcpClient = null;/// <summary>/// /// </summary>public Form1(){InitializeComponent();}/// <summary>/// /// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnConnect_Click(object sender, EventArgs e){if (btnConnect.Text.Equals("连接")){btnConnect.Text = "断开";string ip = tbClientIp.Text.Trim();int port = int.Parse(tbClientPort.Text.Trim());tcpClient = new PtLib.TcpClient.TcpClient(ip, port);tcpClient.Open();tcpClient.TcpReceived += TcpClient_TcpReceived;}else{btnConnect.Text = "连接";tcpClient.Close();}}private void TcpClient_TcpReceived(PtLib.TcpClient.TcpClientStateEventArgs args){string str = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fff") + ":";str += Encoding.UTF8.GetString(args.buffer);this.Invoke(new Action(() =>{lbxReceive.Items.Add(str);}));}/// <summary>/// /// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnSend_Click(object sender, EventArgs e){string str = tbxSend.Text.Trim();byte[] sendBytes = Encoding.UTF8.GetBytes(str);tcpClient.Send(sendBytes);}}
}