这篇文章主要介绍了C# Socket连接请求超时机制实现,下面提供代码分享，大家可以参考使用
.Net的System.Net.Sockets.TcpClient和System.Net.Sockets.Socket都没有直接为Connect/BeginConnect提供超时控制机制。因此，当服务器未处于监听状态，或者发生网络故障时，客户端连接请求会被迫等待很长一段时间，直到抛出异常。默认的等待时间长达20~30s。.Net Socket库的SocketOptionName.SendTimeout提供了控制发送数据的超时时间，但并非本文讨论的连接请求的超时时间。实现下面是实现的关键代码：代码如下: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(); } }}
