Question

我正在尝试与服务器通信。

这是我的简单代码：

System.Net.Sockets.TcpClient sock = new System.Net.Sockets.TcpClient();
string outputString = string.Empty;
sock.Connect("stack.overflow", 80);

NetworkStream ns = null;
StreamReader sr = null;
StreamWriter sw = null;

ns = sock.GetStream();
sr = new StreamReader(ns);
sw = new StreamWriter(ns) { NewLine = "\r\n", AutoFlush = true };
ns.ReadTimeout = 10;
sw.WriteLine("send data to server");
sw.Flush();

outputString = sr.ReadLine();
while (!string.IsNullOrEmpty(outputString))
{
    System.Diagnostics.Debug.WriteLine(outputString);
    outputString = sr.ReadLine();
}

（我知道我的代码有改进的余地。它让我的测试变得简单）

ReadLine（）旁边的一切正常。它没有做我期望它做的事情。

它从服务器读取所有行，在最后一行之后它无休止地等待新行。至少对我而言似乎在等待。

我认为它会在最后一行之后停止并返回null或其他内容。

有人可以解释一下，从服务器获取所有线路并继续前进的最佳做法是什么？

Answer 1

我解决了这个问题：

public class ServerHandler
{
    private BackgroundWorker serverWorker = new BackgroundWorker();
    public event EventHandler ServerResponse;

    private TcpClient socket;
    private NetworkStream networkStream;
    private StreamReader streamReader;
    private StreamWriter streamWriter;

    public ServerHandler()
    {
        System.Net.Sockets.TcpClient sock = new System.Net.Sockets.TcpClient();

        serverWorker.WorkerSupportsCancellation = true;
        serverWorker.DoWork += new DoWorkEventHandler(serverWorker_DoWork);
    }

    public void ConnectToServer()
    {
        socket = new TcpClient();
        socket.Connect("stack.overflow", 80);

        networkStream = socket.GetStream();
        streamReader = new StreamReader(networkStream);
        streamWriter = new StreamWriter(networkStream) { NewLine = "\r\n", AutoFlush = true };

        SendMessage("some data");
    }

    public bool IsConnected
    {
        get { return socket.Connected; }
    }

    public void StartListening()
    {
        if (ServerResponse == null)
            throw new Exception("There is no event to intercept the response!");

        serverWorker.RunWorkerAsync();
    }

    private void SendMessage(string message)
    {
        streamWriter.WriteLine(message);
        streamWriter.Flush();
    }

    private void serverWorker_DoWork(object sender, DoWorkEventArgs e)
    {
        BackgroundWorker worker = sender as BackgroundWorker;

        while (true)
        {
            string serverResponse = streamReader.ReadLine();

            ServerResponse(serverResponse, new EventArgs());
        }
    }
}

就像willaien已经说过的那样，流不知道它何时结束。只要您与服务器通信，就可以等待响应。

我将监听服务器的代码放在后台工作程序中，当出现新响应时，该代码始终侦听并发送事件。

StreamReader - 来自Socket的ReadLine不会停止

1 个答案: