StreamReader

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();
}

（我知道我的代码还有改进的余地。它让我的测试保持简单）

除 ReadLine() 外一切正常。它没有做我期望它做的事情。

它从服务器读取所有行，并在最后一行之后无休止地等待新行。至少对我来说，它似乎在等待。

我认为它会在最后一行之后停止，return null 或其他内容。

有人可以向我解释从服务器获取所有线路并继续前进的最佳做法是什么吗？

Answer 1

我是这样解决的：

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());
        }
    }
}

正如 willaien 所说，流不知道何时结束。只要您正在与服务器通信，您就可以等待响应。

我将侦听服务器的代码放在后台工作程序中，它始终侦听并在出现新响应时发送事件。

StreamReader - 来自 Socket 的 ReadLine 不会停止

StreamReader - ReadLine from Socket doesn't stop

c#

sockets

tcpclient

readline