C# Socket通信Server-client

1.服务器端代码如下：
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 SocketServer
{
public partial class ServerForm : Form
{
public ServerForm()
{
InitializeComponent();
//关闭对文本框的非法线程操作检查
TextBox.CheckForIllegalCrossThreadCalls = false;
}
Thread threadWatch = null;// 负责监听客户端的线程
Socket socketWatch = null;// 负责监听客户端的套接字
Socket clientConnection = null;// 负责和客户端通信的套接字
private void btn_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(ipAddress.Text.ToString()))
{
MessageBox.Show(“监听ip地址不能为空！”);
return;
}
if (string.IsNullOrEmpty(port.Text.ToString()))
{
MessageBox.Show(“监听端口不能为空！”);
return;
}
// 定义一个套接字用于监听客户端发来的消息，包含三个参数（ipv4寻址协议，流式连接，tcp协议）
socketWatch = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// 服务端发送消息需要一个ip地址和端口号
IPAddress ip = IPAddress.Parse(ipAddress.Text.Trim());
// 把ip地址和端口号绑定在网路节点endport上
IPEndPoint endPort = new IPEndPoint(ip, int.Parse(port.Text.Trim()));
// 监听绑定的网路节点
socketWatch.Bind(endPort);
// 将套接字的监听队列长度设置限制为0，0表示无限
socketWatch.Listen(0);
// 创建一个监听线程
threadWatch = new Thread(WatchConnecting);
threadWatch.IsBackground = true;
threadWatch.Start();
chatContent.AppendText(“成功启动监听！ip：”+ip+“，端口：”+port.Text.Trim()+“\r\n”);
}
///
/// 监听客户端发来的请求
///
private void WatchConnecting()
{
//持续不断监听客户端发来的请求
while (true)
{
clientConnection = socketWatch.Accept();
chatContent.AppendText(“客户端连接成功！”+“\r\n”);
// 创建一个通信线程
ParameterizedThreadStart pts = new ParameterizedThreadStart(acceptMsg);
Thread thr = new Thread(pts);
thr.IsBackground = true;
thr.Start(clientConnection);
}
}
///
/// 接收客户端发来的消息
///
/// 客户端套接字对象
private void acceptMsg(object socket)
{
Socket socketServer = socket as Socket;
while (true)
{
//创建一个内存缓冲区 其大小为1024*1024字节 即1M
byte[] recMsg = new byte[1024 * 1024];
//将接收到的信息存入到内存缓冲区,并返回其字节数组的长度
int length = socketServer.Receive(recMsg);
//将机器接受到的字节数组转换为人可以读懂的字符串
string msg = Encoding.UTF8.GetString(recMsg,0,length);
chatContent.AppendText(“客户端(” + GetCurrentTime() + “):” + msg + “\r\n”);
}
}
///
/// 发送消息到客户端
///
///
private void serverSendMsg(string msg)
{
byte[] sendMsg = Encoding.UTF8.GetBytes(msg);
clientConnection.Send(sendMsg);
chatContent.AppendText(“服务端(”+GetCurrentTime()+“):”+msg+“\r\n”);
}
///
/// 获取当前系统时间的方法
///
/// 当前时间
private DateTime GetCurrentTime()
{
DateTime currentTime = new DateTime();
currentTime = DateTime.Now;
return currentTime;
}
///
/// 回复客户端消息
///
///
///
private void btnreply_Click(object sender, EventArgs e)
{
serverSendMsg(replyContent.Text.Trim());
}
}
}
页面如图所示

2.客户端代码如下：
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 SocketClient
{
public partial class ClientForm : Form
{
public ClientForm()
{
InitializeComponent();
//关闭对文本框的非法线程操作检查
TextBox.CheckForIllegalCrossThreadCalls = false;
}
// 创建一个客户端套接字
Socket clientSocket = null;
// 创建一个监听服务端的线程
Thread threadServer = null;
private void btn_Click(object sender, EventArgs e)
{
clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
if (string.IsNullOrEmpty(ipAddress.Text.ToString()))
{
MessageBox.Show(“监听ip地址不能为空！”);
return;
}
if (string.IsNullOrEmpty(port.Text.ToString()))
{
MessageBox.Show(“监听端口不能为空！”);
return;
}
IPAddress ip = IPAddress.Parse(ipAddress.Text.Trim());
IPEndPoint endpoint = new IPEndPoint(ip, int.Parse(port.Text.Trim()));
try
{ //这里客户端套接字连接到网络节点(服务端)用的方法是Connect 而不是Bind
clientSocket.Connect(endpoint);
chatContent.AppendText(“连接成功！\r\n”);
}
catch
{
chatContent.AppendText(“连接失败！\r\n”);
}
// 创建一个线程监听服务端发来的消息
threadServer = new Thread(recMsg);
threadServer.IsBackground = true;
threadServer.Start();
}
///
/// 接收服务端发来的消息
///
private void recMsg() {
while (true) //持续监听服务端发来的消息
{
//定义一个1M的内存缓冲区 用于临时性存储接收到的信息
byte[] arrRecMsg = new byte[1024 * 1024];
int length = 0;
try
{
//将客户端套接字接收到的数据存入内存缓冲区, 并获取其长度
length = clientSocket.Receive(arrRecMsg);
}
catch
{
return;
}
//将套接字获取到的字节数组转换为人可以看懂的字符串
string strRecMsg = Encoding.UTF8.GetString(arrRecMsg, 0, length);
//将发送的信息追加到聊天内容文本框中
chatContent.AppendText(“服务端(” + GetCurrentTime() + “):” + strRecMsg + “\r\n”);
}
}
///
/// 发送消息到服务端
///
///
private void clientSendMsg(string msg)
{
byte[] sendMsg = Encoding.UTF8.GetBytes(msg);
clientSocket.Send(sendMsg);
chatContent.AppendText(“客户端(” + GetCurrentTime() + “):” + msg + “\r\n”);
}
///
/// 获取当前系统时间的方法
///
/// 当前时间
private DateTime GetCurrentTime()
{
DateTime currentTime = new DateTime();
currentTime = DateTime.Now;
return currentTime;
}
///
/// 回复服务器端消息
///
///
///
private void btnreply_Click(object sender, EventArgs e)
{
clientSendMsg(replyContent.Text.Trim());
}
}
}
页面如图所示：