從C＃中的套接字讀取

Question

我正在嘗試從TCP開放式流套接字讀取ASCII文本響應

到目前為止，這是我想出的。 我想知道包括錯誤處理在內的最佳方法是什么。 我是否還應該在do循環中的Receive調用之后檢查SocketError？

IPEndPoint ep = new IPEndPoint(IPAddress.Parse("192.168.1.1"), 9000);
Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
sock.SendTimeout = 5000;
sock.ReceiveTimeout = 5000;
if (null != sock)
{
    try
    {
        sock.Connect(ep);
        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;

                do
                {
                    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");
            }
            else
                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)
    {
        Console.WriteLine(ex.Message);
    }
    finally
    {
        sock.Shutdown(SocketShutdown.Both);
        sock.Close();
    }
}

Answer 1

最好的選擇可能是TcpClient。 在.NET文檔中，有一個很好的示例可以准確地完成您正在做的事情：

http://msdn.microsoft.com/en-us/library/system.net.sockets.tcpclient.aspx

祝你好運！