异步StreamWriter读写C＃

Question

我一直在编写由两部分组成的聊天程序：服务器和客户端。 服务器使用TcpListener侦听加入服务器的传入请求，而客户端使用TcpClient连接服务器并发送消息。 到目前为止，我已经有了握手，这是客户端连接时发送的第一条消息-它包含客户端的IP地址和昵称集。 我不知道如何使服务器异步监听，因为如果它不是异步的，那么聊天将是client -> server -> client -> server而它需要一次连接到多个客户端，并接收多个消息一次。 到目前为止，我的代码是同步编写的：
客户：

public void StartClient(string serverIP)
{
    ReadWrite rw = new ReadWrite();
    string nick = rw.GetNick();
    string handshakeContents = "HANDSHAKE:" + nick + ":" + GetIP();
    Int32 serverPort = 1336; // yay
    TcpClient client = new TcpClient(serverIP, serverPort);
    Console.WriteLine("Sending initial handshake: {0}", handshakeContents);
    Byte[] data = System.Text.Encoding.ASCII.GetBytes(handshakeContents); // Convert handshakeContents to Byte[]
    NetworkStream stream = client.GetStream(); // Instantiate object "stream" for use in read/write
    stream.Write(data, 0, data.Length); // Send handshakeContents in Byte[] to server
    Console.WriteLine(" - Connecting to IlanChat Server on ip {0}", serverIP);
    Thread.Sleep(1000); // sleep 1s
    data = new Byte[256];
    string responseHandshake = String.Empty; // response handshake from server
    Int32 bytes = stream.Read(data, 0, data.Length); // Read handshake.
    responseHandshake = System.Text.Encoding.ASCII.GetString(data, 0, bytes); // Decode from Byte[] to ASCII string
    Console.WriteLine(" -  Received response handshake: {0}", responseHandshake);
    Console.WriteLine(" - Successfully connected to IlanChat server on IP {0}", serverIP); // display message
    Thread.Sleep(2000);
    Console.Clear();
    List<string> messagesRecieved = new List<string>();
    while(true)
    {
        Console.Clear();
        foreach (string msg in messagesRecieved)
        {
            Console.WriteLine(msg);
        }
        Console.WriteLine();
        Console.Write("Enter message: ");
        string msgRaw = Console.ReadLine();
        string sendMsg = nick + ": " + msgRaw;
        data = new Byte[256];
        data = System.Text.Encoding.ASCII.GetBytes(sendMsg);
        stream.Write(data, 0, data.Length); // finish this async shit
    }
}

服务器：

        List<string> clientIP = new List<string>();
        List<string> clientNicks = new List<string>();
        string responseHandshake = "hello";
        Int32 serverPort = 1336;
        IPAddress machineIP = IPAddress.Parse(GetIP());
        Console.Clear();
        Console.WriteLine(" - Starting IlanChat server on IP {0}", machineIP);
        TcpListener server = null;
        server = new TcpListener(machineIP, serverPort);
        server.Start();
        Byte[] buffer = new Byte[256];
        String data = null;
        Console.WriteLine("Successfully started IlanChat server!");
        while (true) // first alpha - only one user at a time
        {
            Console.WriteLine();
            Console.WriteLine("Waiting for connections..");
            TcpClient client = server.AcceptTcpClient();
            Console.WriteLine("User connecting..");
            Console.WriteLine("Receiving handshake data..");
            data = null;
            NetworkStream stream = client.GetStream();
            int i;
            while ((i = stream.Read(buffer, 0, buffer.Length)) != 0)
            {
                data = System.Text.Encoding.ASCII.GetString(buffer, 0, i);
                Console.WriteLine("Received handshake data: {0}", data);
                Console.WriteLine("Processing data.."); // sample handshake: - HANDSHAKE:nick:ip
                string tempNick = data.Replace("HANDSHAKE:", "");
                string[] userDetails = tempNick.Split(':'); // should store to 0:nick, 1:ip
                Console.WriteLine("Received client nick: {0}", userDetails[0]);
                Console.WriteLine("Received client IP: {0}", userDetails[1]);
                break;
            }
            Thread.Sleep(1100); // sleep
            buffer = System.Text.Encoding.ASCII.GetBytes(responseHandshake);
            Console.WriteLine("Sending response handshake..");
            stream.Write(buffer, 0, buffer.Length);
        }

有没有一种方法可以使服务器一次接受多个连接并进行维护？ 有没有一种方法可以使客户端一次接收多条消息并在刷新消息时键入？

Answer 1

您需要查看使用线程（任务库，异步/等待）来执行所需的操作。 试试看这里：

https://codereview.stackexchange.com/questions/29000/c-console-chat-server-async-await-tcpclient-tcplistener-networkstream-asyn

首先，假设代码中的逻辑正确，那么您想拆分服务器/客户端，如下所示：

static void RunServer()
        {
            List<string> clientIP = new List<string>();
            List<string> clientNicks = new List<string>();
            string responseHandshake = "hello";
            Int32 serverPort = 1336;
            IPAddress machineIP = IPAddress.Parse(GetIP());
            Console.Clear();
            Console.WriteLine(" - Starting IlanChat server on IP {0}", machineIP);
            TcpListener server = null;
            server = new TcpListener(machineIP, serverPort);
            server.Start();
            Byte[] buffer = new Byte[256];
            String data = null;
            Console.WriteLine("Successfully started IlanChat server!");
            while (true) // first alpha - only one user at a time
            {
                Console.WriteLine();
                Console.WriteLine("Waiting for connections..");
                TcpClient client = server.AcceptTcpClient();

                Task.Run(() => RunClient(client));
            }
        }

        static void RunClient(TcpClient client)
        {
            Byte[] buffer = new Byte[256];
            Console.WriteLine("User connecting..");
            Console.WriteLine("Receiving handshake data..");
            String data = null;
            string responseHandshake = "hello";

            NetworkStream stream = client.GetStream();
            int i;
            while ((i = stream.Read(buffer, 0, buffer.Length)) != 0)
            {
                data = System.Text.Encoding.ASCII.GetString(buffer, 0, i);
                Console.WriteLine("Received handshake data: {0}", data);
                Console.WriteLine("Processing data.."); // sample handshake: - HANDSHAKE:nick:ip
                string tempNick = data.Replace("HANDSHAKE:", "");
                string[] userDetails = tempNick.Split(':'); // should store to 0:nick, 1:ip
                Console.WriteLine("Received client nick: {0}", userDetails[0]);
                Console.WriteLine("Received client IP: {0}", userDetails[1]);
                break;
            }
            Thread.Sleep(1100); // sleep
            buffer = System.Text.Encoding.ASCII.GetBytes(responseHandshake);
            Console.WriteLine("Sending response handshake..");
            stream.Write(buffer, 0, buffer.Length);
        }