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Форум программистов > Базы данных под .NET > Socket.Connect

Автор: DEADLY 2.4.2010, 07:12

как уменьшить время на попытку подключения в Socket.Connect  т.е. при подключении к адресу он ожидает около 10 сек и больше ,если не может приконектится,как уменьшить этот интервал ??? Код public static String StartClient(IPAddress cIP, int port, String input)         {             try             {                 int bytesRead;                 byte[] inbuf = Encoding.ASCII.GetBytes(input);                 Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);                 String response = String.Empty;                 StateObject state = new StateObject();                 state.workSocket = client;                 client.Connect(cIP, port);                 if (!client.Connected)                     return "no response";                 client.Send(inbuf);                 if (!client.Poll(3000, SelectMode.SelectRead))                 {                     return "ERROR";                 }                 bytesRead = client.Receive(state.buffer);                 response = Encoding.ASCII.GetString(state.buffer, 0, bytesRead);                 //Console.WriteLine("Answer from {0}: {1}", cIP.ToString(), response);                 client.Shutdown(SocketShutdown.Both);                 client.Close();                 return response;             }             catch             {                 //if (e == System.Net.Sockets.SocketException)                 //Console.WriteLine(e.ToString());                 //Console.WriteLine("*НЕТ СВЯЗИ С КОНТРОЛЛЕРОМ {0}*", cIP.ToString());                 return "no response";             }         }

Автор: jonie 4.4.2010, 16:30

во-первых можно крутануть реестр: http://support.microsoft.com/default.aspx?scid=kb;en-us;120642 во-вторых в C# можно применить такой хак: Код public static Socket ConnectToserver(IPEndPoint endPoint, int port, int timeoutMs)         {             Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);             try             {                 // do not block - do not want to be forced to wait on (too- long) timeout                 socket.Blocking = false;                 // initiate connection - will cause exception because we're not  blocking                 socket.Connect(endPoint);                 return socket;             }             catch (SocketException socketException)             {                 // check if this exception is for the expected 'Would Block' error                 if (socketException.ErrorCode != 10035)                 {                     socket.Close();                     // the error is not 'Would Block', so propogate the exception                     throw;                 }                 // if we get here, the error is 'Would Block' so just continue  execution   }                 // wait until connected or we timeout                 int timeoutMicroseconds = timeoutMs * 1000;                 if (socket.Poll(timeoutMicroseconds, SelectMode.SelectWrite) == false)                 {                     // timed out                     socket.Close();                     throw new Exception("The host failed to connect");                 }                 // *** AT THIS POINT socket.Connected SHOULD EQUAL TRUE BUT  IS FALSE!  ARGH!                 // set socket back to blocking                 socket.Blocking = true;                 return socket;             }         } а вот в C++ начиная с WinXP есть ConnectEx вроде бы... кроме того можно использовать Overlapped IO .....

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