networkstream对象read（）时挂了怎么回事？

Question

应该不是长度的问题。
ns的watch如下：- ns {System.Net.Sockets.NetworkStream} System.Net.Sockets.NetworkStream
+ base {System.Net.Sockets.NetworkStream} System.IO.Stream {System.Net.Sockets.NetworkStream}
CanRead true bool
CanSeek false bool
CanTimeout true bool
CanWrite true bool
DataAvailable false bool
- Length 'ns.Length' threw an exception of type 'System.NotSupportedException' long {System.NotSupportedException}
+ base {"此流不支持查找操作。"} System.SystemException {System.NotSupportedException}
- Position 'ns.Position' threw an exception of type 'System.NotSupportedException' long {System.NotSupportedException}
+ base {"此流不支持查找操作。"} System.SystemException {System.NotSupportedException}
ReadTimeout -1 int
WriteTimeout -1 int
- Non-Public members
+ base {System.Net.Sockets.NetworkStream} System.IO.Stream {System.Net.Sockets.NetworkStream}
Connected false bool
+ InternalSocket {System.Net.Sockets.Socket} System.Net.Sockets.Socket
m_CleanedUp false bool
m_CloseTimeout -1 int
m_CurrentReadTimeout -1 int
m_CurrentWriteTimeout -1 int
m_OwnsSocket false bool
m_Readable true bool
+ m_StreamSocket {System.Net.Sockets.Socket} System.Net.Sockets.Socket
m_Writeable true bool
Readable true bool
- Socket {System.Net.Sockets.Socket} System.Net.Sockets.Socket
AddressFamily InterNetwork System.Net.Sockets.AddressFamily
Available 0 int
Blocking true bool
Connected false bool
DontFragment false bool
+ EnableBroadcast 'ns.Socket.EnableBroadcast' threw an exception of type 'System.Net.Sockets.SocketException' bool {System.Net.Sockets.SocketException}
ExclusiveAddressUse false bool
+ Handle 1516 System.IntPtr
IsBound true bool
+ LingerState {System.Net.Sockets.LingerOption} System.Net.Sockets.LingerOption
+ LocalEndPoint {127.0.0.1:2588} System.Net.EndPoint {System.Net.IPEndPoint}
+ MulticastLoopback 'ns.Socket.MulticastLoopback' threw an exception of type 'System.Net.Sockets.SocketException' bool {System.Net.Sockets.SocketException}
NoDelay false bool
ProtocolType Tcp System.Net.Sockets.ProtocolType
ReceiveBufferSize 8192 int
ReceiveTimeout 0 int
+ RemoteEndPoint {127.0.0.1:1987} System.Net.EndPoint {System.Net.IPEndPoint}
SendBufferSize 8192 int
SendTimeout 0 int
SocketType Stream System.Net.Sockets.SocketType
Ttl 32 short
UseOnlyOverlappedIO false bool
+ Static members
+ Non-Public members
Writeable true bool

Answer 1

这个里面的localEndPoint和RemoteEndPoint的端口不晓得为什么不一样。

Answer 2

不是客户端死掉了，而是read方法在没有数据可读时会阻塞，正如console.readline在没有输入会阻塞一样

Answer 3

read是同步读取，会阻塞，想不阻塞，可以用异步read，也就是用ns.BeginRead
或者把同步read的代码放到线程里面，你的客户端界面就不会卡死了

Answer 4

  BackgroundWorker bgWorkder = new BackgroundWorker();
 bgWorkder.DoWork += new DoWorkEventHandler(bgWorkder_DoWork);
 bgWorkder.RunWorkerAsync();  void bgWorkder_DoWork(object sender, DoWorkEventArgs e)
        {T IPAddress ip = IPAddress.Parse(txtIp.Text);
            IPEndPoint ipPoint = new IPEndPoint(ip, Convert.ToInt16(txtPort.Text));
            tcpClient = new TcpClient();
            tcpClient.Connect(ipPoint);
            while (true)
            {
                NetworkStream nStream = tcpClient.GetStream();
                byte[] buffer = new byte[102400];
                int received = nStream.Read(buffer, 0, buffer.Length);
                txtRec.AppendText(Encoding.GetEncoding("GB2312").GetString(buffer));
                txtRec.AppendText("\r\n");
            }}至于beginRead,应该更方便,有人能给出demo否?

Answer 5

Read阻塞没有问题，不管同步还是异步，在没有数据可读时，Read所在的线程都会阻塞。
问题在于服务器一直没给客户端发送数据，应该把
Socket socket = listener.AcceptSocket();

clientService.Start();的代码改成：while (true) {
TcpClient client = listener.AcceptTcpClient();byte[] data = Encoding.Unicode.GetBytes("要发送的数据");client.GetStream().Write(data, 0, data.Length);client.GetStream().Close();
client.Close();
}这样客户端Read就可以执行下去了