C# – Reading from a socket in C#


I am trying to read ASCII text response from a tcp open streaming socket

This is what I have come up with so far. I want to know what is the best way to do this that includes error handling. Should I also be checking the SocketError after the Receive call in the do loop?

IPEndPoint ep = new IPEndPoint(IPAddress.Parse(""), 9000);
Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
sock.SendTimeout = 5000;
sock.ReceiveTimeout = 5000;
if (null != sock)
        if (sock.Connected)

            // Blocks until send returns.
            int bytesSent = sock.Send(buffer);
            Console.WriteLine("Sent {0} bytes.", bytesSent);
            //get the first 4 bytes, should be the lenngth of the rest of the response.
            byte[] response = new byte[4];
            int bytesRec = sock.Receive(response);
            int totalBytesRec = 0;
            if (4 == bytesRec)
                int len = BitConverter.ToInt32(response, 0);
                response = new byte[len];
                Console.WriteLine("Trying to get {0} bytes.", len);
                bytesRec = 0;

                    bytesRec = sock.Receive(response);
                    totalBytesRec += bytesRec;
                    forecast += Encoding.ASCII.GetString(response, 0, bytesRec);
                } while (totalBytesRec < len && bytesRec > 0);

                if (totalBytesRec != len)
                    throw new Exception("The total bytes recieved from manager did not equal the expected bytes");
                throw new Exception("Unable to get the response size from the manager");

            Console.WriteLine("Received {0} bytes.", totalBytesRec);

    catch (SocketException ex)
        Console.WriteLine("{0} Error code: {1}.", ex.Message, ex.ErrorCode);
    catch (Exception ex)

Best Solution

Your best bet is probably TcpClient. There's a great sample that does exactly what you're doing right in the .NET Documentation here:


Good luck to you!

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