C# Socket通讯实例

      socket的英文原义是“孔”或“插座”。通常称作"套接字"，用于描述IP地址和端口，是一个通信链的句柄。在Internet上的主机一般运行了多个服务软件，同时提供几种服务。每种服务都打开一个Socket，并绑定到一个端口上，不同的端口对应于不同的服务。Socket正如其英文原意那样，象一个多孔插座。
     创建Socket通讯的基本流程图

示例代码：

一、服务端

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 CXZChatService.Service
{
public static class SocketService
{
private static byte[] result = new byte[1024];
private static int myProt = 8085; //端口号
static Socket serverSocket;

public static void startService()
{
IPAddress ip = IPAddress.Parse("127.0.0.1");
//第一个参数指定用IpV4方式寻址
//使用指定的地址族、套接字类型和协议初始化 Socket 类的新实例。
serverSocket = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
serverSocket.Bind(new IPEndPoint(ip, myProt)); //绑定IP地址：端口
serverSocket.Listen(100);//设定最多100个排队连接请求
Console.WriteLine("启动监听{0}成功", serverSocket.LocalEndPoint.ToString());
Thread myThread = new Thread(ListenClientConnect);
myThread.Start();
Console.ReadLine();
}
/// <summary>
/// 监听客户端的连接
/// </summary>
public static void ListenClientConnect()
{
while (true)
{
Socket clientSocket = serverSocket.Accept();//等待客户端的连接
// clientSocket.Send(Encoding.ASCII.GetBytes("Server Say Hello"));//向客户端发送数据

Thread receiveThread = new Thread(receiveRegister);//启动一个线程来接受数据
receiveThread.Start(clientSocket);
}
}
/// <summary>
/// 接收消息
/// </summary>
/// <param name="clientSocket"></param>
public static void ReceiveMessage(object clientSocket)
{
Socket myClientSocket = (Socket)clientSocket;
while(true)
{
try
{
int receiveNumber = myClientSocket.Receive(result);
Console.WriteLine("接收客户端{0}消息{1}", myClientSocket.RemoteEndPoint.ToString(), Encoding.ASCII.GetString(result, 0, receiveNumber));
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
myClientSocket.Shutdown(SocketShutdown.Both);
myClientSocket.Close();
break;
}
}
}

/// <summary>
/// 接收注册信息
/// </summary>
/// <param name="clientSocket"></param>
public static void receiveRegister(object clientSocket)
{
Socket myClientSocket = (Socket)clientSocket;
while(true)
{
try
{
int receiveNumber = myClientSocket.Receive(result);
string register = Encoding.ASCII.GetString(result, 0, receiveNumber);
String[] r = AnalyseString.AnalyseStr(register);
if (r[0].Equals("register"))
{
List<string> list = new List<string>();
list.Add(r[1]);
list.Add(myClientSocket.RemoteEndPoint.ToString());
User.userlist.Add(list);
Console.WriteLine(r[1]);
}
}catch (Exception ex)
{
Console.WriteLine(ex.Message);
myClientSocket.Shutdown(SocketShutdown.Both);
myClientSocket.Close();
break;
}
}
}

}
}


在主函数中调用startService()即可

二、客户端代码using System;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;
using System.Threading;

namespace CXZClient
{
class Client
{
private static byte[] result = new byte[1024];
public static void startClient()
{
string message = null;//客户端名字
IPAddress ip = IPAddress.Parse("127.0.0.1");
Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

try
{
clientSocket.Connect(new IPEndPoint(ip, 8085)); //连接服务器IP与端口
Console.WriteLine("连接服务器成功");
message = Console.ReadLine();
}
catch
{
Console.WriteLine("连接服务器失败，请按回车键退出！");
return;
}
//通过clientSocket接收数据
try
{
clientSocket.Send(Encoding.ASCII.GetBytes("register#" + message));
}
catch
{
clientSocket.Shutdown(SocketShutdown.Both);
// clientSocket.Close();
} //--------------------------
Console.WriteLine("按回车键退出");
Console.ReadLine();
}

}
}

在客户端发送完消息后回车，这是客户端代码执行完毕，服务会关闭这个客户端的连接。