Question

我正在尝试通过TCP / IP从WP8连接到ip / port。我使用socket.ConnectAsync（）来启动Connection并指定像这样的完成事件

        socketEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(delegate(object s, SocketAsyncEventArgs e)
        {
            lasterrorstring = e.SocketError.ToString();
            if (e.SocketError != SocketError.Success)
            {
                 :
            }
        });

一切正常。所以我可以正确地与其他主机交谈。但是，错误的情况让我很烦恼。出于某种原因，e.SocketError始终返回Success。我甚至尝试连接到不存在的ip。它也报告了成功。甚至Send（）之后也会报告成功。这有什么不对？

为了完整性，这是我的整个连接设置代码

        Socket _socket = null;

        DnsEndPoint hostEntry = new DnsEndPoint(hostName, portNumber);

        // Create a stream-based, TCP socket using the InterNetwork Address Family. 
        _socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

        // Create a SocketAsyncEventArgs object to be used in the connection request
        SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs();
        socketEventArg.RemoteEndPoint = hostEntry;

        // Inline event handler for the Completed event.
        // Note: This event handler was implemented inline in order to make this method self-contained.
        socketEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(delegate(object s, SocketAsyncEventArgs e)
        {
            // Retrieve the result of this request
            lasterrorstring = e.SocketError.ToString();
            if (e.SocketError != SocketError.Success)
            {
                res = 1;
            }
        });

        // Make an asynchronous Connect request over the socket
        _socket.ConnectAsync(socketEventArg);

Answer 1

这是一个老问题，但无论如何。它也发生在我身上，看起来直到你通过SendAsync方法发送东西，它认为它是连接的。但是在SendAsync的完成事件中，e.SocketError不会返回成功。因此，您可以在ConnectAsync返回成功后立即发送空数据，以了解它是否真的已连接。

WP8套接字ConnectAsync：已完成的处理程序始终返回成功？

1 个答案: