C # Socket connection request Timeout mechanism implementation code sharing

  This article mainly introduces the C # socket connection request Timeout mechanism implementation, the following provides code sharing, you can refer to the use of

. Net System.Net.Sockets.TcpClient and System.Net.Sockets.Socket do not provide a time-out control mechanism directly for Connect/beginconnect. Therefore, when the server is not listening, or a network failure occurs, the client connection request is forced to wait for a long time until an exception is thrown. The default wait time is up to 20~30s. Net Socket Library Socketoptionname.sendtimeout provides a time-out for controlling the sending of data, but not a timeout for connection requests discussed in this article. Implementation   Below is the key code for implementation: The   code is as follows: Class Timeoutsocket {    private static bool isconnectionsuccessful = FALSE;     private static Exception socketexception;     private static ManualResetEvent Timeoutobject = new ManualResetEvent (false);       public static tcpclient Tryconnect (IPEndPoint remoteendpoint, int timeoutmilisecond)     {         timeoutobject.reset ();         socketexception = null;             String serverip = Convert.ToString (remoteendpoint.address);         int serverport = Remoteendpoint.port;                    TcpClient tcpclient = new TCPCLIent ();           TcpClient. BeginConnect (ServerIP, serverport,              new AsyncCallback (Callbackmethod), TcpClient);           if (Timeoutobject.waitone (Timeoutmilisecond, false)         {&nbs P           if (isconnectionsuccessful)             {    & nbsp           return tcpclient;                         else         &NB Sp   {                throw socketexception                     {        else         {    &NBSP ;       TcpClient. Close ();             throw new TimeoutException ("TimeOut Exception");   &nbsp    }    }     private static void Callbackmethod (IAsyncResult asyncresult)     {         try         {            ISCONNECTIONSUCCE Ssful = false;             TcpClient tcpclient = asyncresult. AsyncState as TcpClient;               if (tcpclient. Client!= null)             {                TCPCLI Ent. EndConnect (asyncresult);                 isconnectionsuccessful = true;                     {        catch (Exception ex)         {            isconnectionsuccessful = false;     &NB Sp       socketexception = ex;        }         finally         {            timeoutobject.set ();        }    }