[我眼中的C#]创建多人聊天室_c# blazor singler 聊天室-优快云博客

本文介绍了一个简单的TCP聊天室系统的实现过程。服务器端使用C#语言，通过Socket API创建了一个监听客户端连接并广播消息的服务器。客户端同样使用C#语言编写，能够发送消息到服务器，并从服务器接收其他客户端的消息。

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服务器端：

 static List<Client> clients = new List<Client>();
        /// <summary>
        /// 广播消息
        /// </summary>
        /// <param name="message"></param>
        public static void BroadcastMessage(string message)
        {
            var notCnnected=new List<Client>();
            foreach (var client in clients)
            {
                if (client.Connected)
                {
                    client.SendMessage(message);
                }
                else
                {
                    notCnnected.Add(client);
                }
            }
            foreach (var  temp in notCnnected)
            {
                clients.Remove(temp);
            }
        }
        static void Main(string[] args)
        {
            Socket tcpServer = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            tcpServer.Bind(new IPEndPoint(IPAddress.Parse("127.0.0.1"), 7899));
            tcpServer.Listen(100);
            Console.WriteLine("开始监听！");
            while (true)
            {
                Socket tcpClient = tcpServer.Accept();
                Console.WriteLine("一个客户端已经连接！");
                Client client = new Client(tcpClient);//把与客户端通信的逻辑（收发消息）放到Client里面进行处理
                clients.Add(client);
            }
        }

服务器端还需要一个类用来处理和客户端通信的逻辑（收发消 class Client
{
private Socket clientSocket;
private Thread t;
private byte[] data = new byte[1024];
public bool Connected { get { return clientSocket.Connected; } }
public Client(Socket clientSocket)
{
this.clientSocket = clientSocket;
//启动一个线程处理客户端的数据接收
t = new Thread(ReceiveMessage);
t.Start();
}

    public void SendMessage(string message)
    {
        byte[] data = Encoding.UTF8.GetBytes(message);
        clientSocket.Send(data);
    }
    private void ReceiveMessage()
    {
        //一直接受客户端的数据
        while (true)
        {
            if (clientSocket.Poll(10,SelectMode.SelectRead))
            {
                clientSocket.Close();
                break;
            }
            int length=clientSocket.Receive(data);
            string message = Encoding.UTF8.GetString(data,0,length);
            //TODO:服务器端接收到数据的时候分发到客户端
            //广播这个消息
            Program.BroadcastMessage(message);
        }
    }
}：

static void Main(string[] args)
        {
            Socket tcpClient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            IPAddress ip = IPAddress.Parse("127.0.0.1");
            EndPoint point = new IPEndPoint(ip, 7899);
            tcpClient.Connect(point);
            Thread t = new Thread(ReceiveMessage);
            t.Start(tcpClient);
            while (true)
            {
                string message = Console.ReadLine();
                if (message == "q")
                {
                    tcpClient.Close();
                    break;
                }
                byte[] data = Encoding.UTF8.GetBytes(message);
                tcpClient.Send(data);
            }
            //tcpClient.Shutdown(SocketShutdown.Both);
        }

        static void ReceiveMessage(object s)
        {

            while (true)
            {
                byte[] data = new byte[1024];
                int length = (s as Socket).Receive(data);
                string message = Encoding.UTF8.GetString(data, 0, length);
                Console.WriteLine(message);
            }

        }