C# Socket串連請求逾時機制實現代碼分享

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 這篇文章主要介紹了C# Socket串連請求逾時機制實現,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提供逾時控制機制。因此,當伺服器未處於監聽狀態,或者發生網路故障時,用戶端串連請求會被迫等待很長一段時間,直到拋出異常。預設的等待時間長達20~30s。.Net Socket庫的SocketOptionName.SendTimeout提供了控制發送資料的逾時時間,但並非本文討論的串連請求的逾時時間。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();        }    }}

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