Operation not allowed on non-connected Sockets - C# 4.0

Jarred Sumner picture Jarred Sumner · Nov 13, 2010 · Viewed 30.5k times · Source

It keeps having an error "Operation not allowed on non-connected sockets" on the line

var ServerStream = Connect2Server.GetStream();

And I'm not really sure why

Below is rest of the code for that function

var buffersize = 0;
var Convert2Tet = new ASCIIEncoding();
var Connect2Server = new TcpClient();
var ServerEndPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8801);
var ServerStream = Connect2Server.GetStream();

Console.WriteLine("Connecting to Server");

Connect2Server.Connect(ServerEndPoint);
var WelcomeMessage = new byte[4096];
ServerStream.Read(WelcomeMessage, 0, 4096);

Console.Write(Convert2Tet.GetChars(WelcomeMessage));

var UserCredentials = Console.ReadLine();
buffersize = Convert2Tet.GetByteCount(UserCredentials);

var Credentials = new byte[buffersize];
Credentials = Convert2Tet.GetBytes(UserCredentials);

ServerStream.Write(Credentials, 0, buffersize);

Answer

Josh picture Josh · Nov 13, 2010

You gotta Connect() before you can get the NetworkStream.

The documentation is usually pretty good for this kinda stuff. Under Exceptions in the help for GetStream, you'll see:

InvalidOperationException: The TcpClient is not connected to a remote host.