C# 网络通信的基本框架 源代码

一、基于 Socket 的 TCP 通信

服务器端

using System;
using System.Text;
using System.Net;
using System.Net.Sockets;

namespace SimpleIMSocketTcpServer
{
    class Program
    {
        static void Main(string[] args)
        {
            Socket localSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            IPEndPoint iep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 888);
            localSocket.Bind(iep);
            localSocket.Listen(1);
            Socket clientSocket = localSocket.Accept();

            Console.WriteLine("localSocket: {0}:{1} .", ((IPEndPoint)localSocket.LocalEndPoint).Address, ((IPEndPoint)localSocket.LocalEndPoint).Port);
            //Console.WriteLine("localSocket: {0}:{1} <-> {2}:{3} .", ((IPEndPoint)localSocket.LocalEndPoint).Address, ((IPEndPoint)localSocket.LocalEndPoint).Port, ((IPEndPoint)localSocket.RemoteEndPoint).Address, ((IPEndPoint)localSocket.RemoteEndPoint).Port);
            Console.WriteLine("clientSocket: {0}:{1} <-> {2}:{3} .", ((IPEndPoint)clientSocket.LocalEndPoint).Address, ((IPEndPoint)clientSocket.LocalEndPoint).Port, ((IPEndPoint)clientSocket.RemoteEndPoint).Address, ((IPEndPoint)clientSocket.RemoteEndPoint).Port);

            clientSocket.Send(Encoding.Default.GetBytes("服务器端: 欢迎加入"));
            byte[] myresult = new byte[1024];
            int length = clientSocket.Receive(myresult);
            string szData = Encoding.Default.GetString(myresult, 0, length);
            //myresult[length] = 0;
            Console.WriteLine("来自 {0} : {1}", clientSocket.RemoteEndPoint, szData);

            //localSocket.Shutdown(SocketShutdown.Both);
            localSocket.Close();
        }
    }
}

 

客户端

using System;
using System.Text;
using System.Net;
using System.Net.Sockets;

namespace SimpleIMSocketTcpClient
{
    class Program
    {
        static void Main(string[] args)
        {
            IPAddress remoteHost = IPAddress.Parse("127.0.0.1");
            IPEndPoint iep = new IPEndPoint(remoteHost, 888);

            Socket localSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            localSocket.Connect(iep);

            string sendMessage = "客户端: 你好";
            localSocket.Send(Encoding.Default.GetBytes(sendMessage));

            byte[] result = new byte[1024];
            int length = localSocket.Receive(result);
            Console.WriteLine("localSocket: {0} <-> {1} .", localSocket.LocalEndPoint, localSocket.RemoteEndPoint);
            Console.WriteLine("来自: {0} : {1}", localSocket.RemoteEndPoint, Encoding.Default.GetString(result, 0, length));

            localSocket.Shutdown(SocketShutdown.Both);
            localSocket.Close();
        }
    }
}

 

二、基于 Socket 的 UDP 通信

服务器端

using System;
using System.Text;
using System.Net;
using System.Net.Sockets;

namespace SimpleIMSocketUdpServer
{
    class Program
    {
        static void Main(string[] args)
        {
            // 开启服务器的 888 端口，用来接收任何传送到本机的讯息。
            IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 888);
            // 建立接收的 Socket，并使用 Udp 的 Datagram 方式接收。
            Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
            // 绑定 Socket (newsock) 与 IPEndPoint (ipep)，让 Socket 接收 888 端口的讯息。
            newsock.Bind(ipep);
            Console.WriteLine("等待客户连入 . . . ");

            // 建立 Remote 对象以便取得封包的接收来源的 EndPoint 对象。
            IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
            EndPoint Remote = (EndPoint)(sender);

            while (true) // 无穷循环，不断接收讯息并显示到屏幕上。
            {
                byte[] data = new byte[1024]; // 设定接收缓冲区的数组变量。
                int recv = newsock.ReceiveFrom(data, ref Remote); // 接收对方传来的封包。
                // 将该封包以 UTF8 的格式译码为字符串，并显示到屏幕上。
                string recvString = Encoding.UTF8.GetString(data, 0, recv);    // 读取键盘输入
                Console.WriteLine(recvString);
                if (recvString == "exit")
                    break;
            }
            Console.WriteLine("断开连接");
            newsock.Close();
        }
    }
}

 

客户端

using System;
using System.Text;
using System.Net;
using System.Net.Sockets;

namespace SimpleIMSocketUdpClient
{
    class Program
    {
        static void Main(string[] args)
        {
            // 连接到 args[0] 参数所指定的 Server，使用端口 888
            //IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(args[0]), 888);
            IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 888);
            // 建立 Socket，连接到 Internet (InterNetwork)，使用 Udp 协议的 Datagram 方式 (Dgram)。
            Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
            while (true)     // 不断读取键盘输入，并传送输入讯息给服务器。
            {
                string input = Console.ReadLine();    // 读取键盘输入
                server.SendTo(Encoding.UTF8.GetBytes(input), ipep);    // 将讯息以 UTF8 的方式编码后传出。
                if (input == "exit")    // 如果输入为 exit，则强制离开程序。
                    break;
            }
            Console.WriteLine("客户端停止");    // 印出 Stopping client 讯息。
            server.Close();    // 关闭联机。
        }
    }
}

 

三、基于 TcpListener 和 TcpClient 的 TCP 通信

服务器端

using System;
using System.Text;
using System.Net;
using System.Net.Sockets;

namespace SimpleIMTcpServer
{
    class Program
    {
        static void Main(string[] args)
        {
            IPAddress localip = IPAddress.Any;
            TcpListener listener = new TcpListener(localip, 888);
            listener.Start();
            while (true)
            {
                //等待客户端连接；
                TcpClient client = listener.AcceptTcpClient();
                Console.WriteLine("{0} <-> {1}", client.Client.LocalEndPoint, client.Client.RemoteEndPoint);
                //确定连接后，发送信息；
                string msg = "来自服务器端的消息. ";
                NetworkStream clientStream = client.GetStream();
                byte[] temp = Encoding.Default.GetBytes(msg);
                clientStream.Write(temp, 0, temp.Length);

                byte[] result = new byte[1024];
                int length = clientStream.Read(result, 0, 1024);
                string szData = Encoding.Default.GetString(result, 0, length);
                Console.WriteLine("来自 {0} : {1}", client.Client.RemoteEndPoint, szData);

                //发送完毕后关闭连接；
                clientStream.Close();
                client.Close();
            }

        }
    }
}

 

客户端

using System;
using System.Text;
using System.Net.Sockets;

namespace SimpleIMTcpClient
{
    class Program
    {
        static void Main(string[] args)
        {
            TcpClient client = new TcpClient();
            try
            {
                client.Connect("127.0.0.1", 888);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            //读取信息
            NetworkStream serverStream = client.GetStream();
            string sendMessage = "客户端: 你好";
            serverStream.Write(Encoding.Default.GetBytes(sendMessage), 0, sendMessage.Length);

            byte[] buffer = new byte[1024];
            int bytesread = serverStream.Read(buffer, 0, 1024);
            string message = Encoding.Default.GetString(buffer, 0, bytesread);
            Console.WriteLine("{0} <-> {1}", client.Client.LocalEndPoint, client.Client.RemoteEndPoint);
            Console.WriteLine(message);
            //关闭连接
            serverStream.Close();
            client.Close();
        }
    }
}

 

四、基于 UdpClient 的 UDP 通信

服务器端

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

namespace SimpleIMUdpServer
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建UDPClient对象  
            UdpClient client = new UdpClient(888);
            //接受发送主机的IP地址信息  
            IPEndPoint remoteclient = new IPEndPoint(IPAddress.Any, 0);

            while (true)
            {
                //Receive方法包含一个IPEndPoint，携带远程发送主机的IP地址信息  
                byte[] recv = client.Receive(ref remoteclient);
                string data = Encoding.Default.GetString(recv);
                Console.WriteLine("来源 : {0}", remoteclient.ToString());
                Console.WriteLine("内容 : {0}", data);
                if (data == "exit")
                    break;
            }
            Console.WriteLine("连接已断开.");
            client.Close();
        }
    }
}

 

客户端

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

namespace SimpleIMUdpClient
{
    class Program
    {
        static void Main(string[] args)
        {
            //UDPClient对象创建，发送数据  
            UdpClient client1 = new UdpClient(889);
            IPEndPoint ipe = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 888);
            while (true)
            {
                string sendMsg = Console.ReadLine();    // 读取键盘输入
                client1.Send(Encoding.Default.GetBytes(sendMsg), sendMsg.Length, ipe);
                if (sendMsg == "exit")    // 如果输入为 exit，则强制离开程序。
                    break;
            }
            Console.WriteLine("客户端停止");    // 印出 Stopping client 讯息。
            client1.Close();
        }
    }
}

 

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