tcp communication, why is there no response when AcceptTcpClient () is executed?

edmond0

I just learned TCP communication, but the following code is always not responding. Why?
TcpListener tcplistener = new TcpListener (IPAddress.Parse ("127.0.0.1"), 13);
tcplistener.Start ();
byte [] btServerReceive = new byte [256];
string strServerReceive = string.Empty;

while (true)
{
    TcpClient tcp = tcplistener.AcceptTcpClient ();
    NetworkStream ns = tcp.GetStream ();
    int intReceiveLength = ns.Read (btServerReceive, 0, btServerReceive.Length);
    strServerReceive = UnicodeEncoding.Unicode.GetString (btServerReceive, 0, intReceiveLength);
    txtServerResult.AppendText ("ServerReceive:" + strServerReceive + "");
    ns.Write (btServerReceive, 0, btServerReceive.Length);
    txtServerResult.AppendText ("ServerSend:" + strServerReceive + "");
    tcp.Close ();
}

614310

It is recommended to check MSDN first

AcceptTcpClient () is blocked until a client executes Connect. It is normal for you to execute this piece of code until AcceptTcpClient () does not respond.

duck1688

There is no response until the client sends a message, so it is best to put it in a thread

shysxy

Look, I don’t think I understand what code you are