這篇文章主要介紹了C# Socket連接請求超時機制實現,下面提供代碼分享,大家可以參考使用
.Net的System.Net.Sockets.TcpClient和System.Net.Sockets.Socket都沒有直接為Connect/BeginConnect提供超時控制機制。因此,當服務器未處於監聽狀態,或者發生網絡故障時,客戶端連接請求會被迫等待很長一段時間,直到拋出異常。默認的等待時間長達20~30s。.Net Socket庫的SocketOptionName.SendTimeout提供了控制發送數據的超時時間,但並非本文討論的連接請求的超時時間。 實現 下面是實現的關鍵代碼: 代碼如下: 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)) { if (IsConnectionSuccessful) { return tcpclient; } else { throw socketexception; } } else { tcpclient.Close(); throw new TimeoutException("TimeOut Exception"); } } private static void CallBackMethod(IAsyncResult asyncresult) { try { IsConnectionSuccessful = false; TcpClient tcpclient = asyncresult.AsyncState as TcpClient; if (tcpclient.Client != null) { tcpclient.EndConnect(asyncresult); IsConnectionSuccessful = true; } } catch (Exception ex) { IsConnectionSuccessful = false; socketexception = ex; } finally { TimeoutObject.Set(); } } }