一、效果图
二、服务器端代码（源码下载地址：https://download.csdn.net/download/xiaochenxihua/10748789）
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;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Test_AsynSocketTcp
{
public partial class Server : Form
{
public Server()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
Control.CheckForIllegalCrossThreadCalls = false;
}
//开始监听
private void button1_Click(object sender, EventArgs e)
{
//ip地址
IPAddress ip = IPAddress.Parse(txtIP.Text);
// IPAddress ip = IPAddress.Any;
//端口号
IPEndPoint point = new IPEndPoint(ip, int.Parse(txtPort.Text));
//创建监听用的Socket
/*
* AddressFamily.InterNetWork：使用 IP4地址。
SocketType.Stream：支持可靠、双向、基于连接的字节流，而不重复数据。此类型的 Socket 与单个对方主机进行通信，并且在通信开始之前需要远程主机连接。Stream 使用传输控制协议 (Tcp) ProtocolType 和 InterNetworkAddressFamily。
ProtocolType.Tcp：使用传输控制协议。
*/
//使用IPv4地址，流式socket方式，tcp协议传递数据
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//创建好socket后，必须告诉socket绑定的IP地址和端口号。
//让socket监听point
try
{
//socket监听哪个端口
socket.Bind(point);
//同一个时间点过来10个客户端，排队
socket.Listen(10);
ShowMsg("服务器开始监听");
Thread thread = new Thread(AcceptInfo);
thread.IsBackground = true;
thread.Start(socket);
}
catch (Exception ex)
{
ShowMsg(ex.Message);
}
}
//记录通信用的Socket
Dictionary<string, Socket> dic = new Dictionary<string, Socket>();
// private Socket client;
private void AcceptInfo(object o)
{
Socket socket = o as Socket;
while (true)
{
//通信用socket
try
{
//创建通信用的Socket
Socket tSocket = socket.Accept();
string point = tSocket.RemoteEndPoint.ToString();
//IPEndPoint endPoint = (IPEndPoint)client.RemoteEndPoint;
//string me = Dns.GetHostName();//得到本机名称
//MessageBox.Show(me);
ShowMsg(point + "连接成功！");
cboIpPort.Items.Add(point);
dic.Add(point, tSocket);
//接收消息
Thread th = new Thread(ReceiveMsg);
th.IsBackground = true;
th.Start(tSocket);
}
catch (Exception ex)
{
ShowMsg(ex.Message);
break;
}
}
}
//接收消息
void ReceiveMsg(object o)
{
Socket client = o as Socket;
while (true)
{
//接收客户端发送过来的数据
try
{
//定义byte数组存放从客户端接收过来的数据
byte[] buffer = new byte[1024 * 1024];
//将接收过来的数据放到buffer中，并返回实际接受数据的长度
int n = client.Receive(buffer);
//将字节转换成字符串
string words = Encoding.UTF8.GetString(buffer, 0, n);
ShowMsg(client.RemoteEndPoint.ToString() + ":" + words);
}
catch (Exception ex)
{
ShowMsg(ex.Message);
break;
}
}
}
void ShowMsg(string msg)
{
txtLog.AppendText(msg + "\r\n");
}
//给客户端发送消息
private void button2_Click(object sender, EventArgs e)
{
try
{
ShowMsg(txtMsg.Text);
string ip = cboIpPort.Text;
byte[] buffer = Encoding.UTF8.GetBytes(txtMsg.Text);
dic[ip].Send(buffer);
// client.Send(buffer);
}
catch (Exception ex)
{
ShowMsg(ex.Message);
}
}
}//Class_end
}
三、客户端代码（源码下载地址：https://download.csdn.net/download/xiaochenxihua/10748794）
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;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Test_AsynSocketTcpClient
{
public partial class Client : Form
{
Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
public Client()
{
InitializeComponent();
}
private void btnConnection_Click(object sender, EventArgs e)
{
//连接到的目标IP
IPAddress ip = IPAddress.Parse(txtIP.Text);
//IPAddress ip = IPAddress.Any;
//连接到目标IP的哪个应用(端口号！)
IPEndPoint point = new IPEndPoint(ip, int.Parse(txtPort.Text));
try
{
//连接到服务器
client.Connect(point);
ShowMsg("连接成功");
ShowMsg("服务器" + client.RemoteEndPoint.ToString());
ShowMsg("客户端:" + client.LocalEndPoint.ToString());
//连接成功后，就可以接收服务器发送的信息了
Thread th = new Thread(ReceiveMsg);
th.IsBackground = true;
th.Start();
}
catch (Exception ex)
{
ShowMsg(ex.Message);
}
}
//接收服务器的消息
private void ReceiveMsg()
{
while (true)
{
try
{
byte[] buffer = new byte[1024 * 1024];
int n = client.Receive(buffer);
string s = Encoding.UTF8.GetString(buffer, 0, n);
ShowMsg(client.RemoteEndPoint.ToString() + ":" + s);
}
catch (Exception ex)
{
ShowMsg(ex.Message);
break;
}
}
}
/// <summary>
/// 展示消息
/// </summary>
/// <param name="msg"></param>
void ShowMsg(string msg)
{
txtInfo.AppendText(msg + "\r\n");
}
private void btnSend_Click(object sender, EventArgs e)
{
//客户端给服务器发消息
if (client != null)
{
try
{
ShowMsg(txtMsg.Text);
byte[] buffer = Encoding.UTF8.GetBytes(txtMsg.Text);
client.Send(buffer);
}
catch (Exception ex)
{
ShowMsg(ex.Message);
}
}
}
private void Client_Load(object sender, EventArgs e)
{
Control.CheckForIllegalCrossThreadCalls = false;
}
}//class_end
}
注意：该内容来自：http://www.cnblogs.com/weilengdeyu/archive/2013/03/08/2949101.html