BeginAccept方法后无法关闭套接字

Question

我在c#中有一个程序,我在其中创建一个套接字,绑定它,开始监听然后使用beginaccept!但是当我尝试关闭\ shutdown套接字时,我从beginaccept AsyncCallback方法获得异常!

     private void start_listening()
        {

            main_socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            IPEndPoint iplocal = new IPEndPoint(IPAddress.Any, 11150);
            main_socket.Bind(iplocal);
            main_socket.Listen(5);
            main_socket.BeginAccept(new AsyncCallback(OnClientConnect), null);
          }


        private void Disconnect_Click(object sender, EventArgs e)
        {
            main_socket.Shutdown(SocketShutdown.Both);
            main_socket.Close();
        }

        public void OnClientConnect(IAsyncResult asyn)
        {

            try
            {
                clients[connected_clients] = new Client("CHANGEME", "127.0.0.1", this);
                clients[connected_clients].Socket = main_socket.EndAccept(asyn);
                clients[connected_clients].WaitForData();
                main_socket.BeginAccept(OnClientConnect, null);
            }
            catch (SocketException se)
            {
                MessageBox.Show(se.Message);
            }
}

非常感谢!

Answer 1

当main_socket关闭时,将调用OnClientConnect(),但main_socket.EndAccept()应抛出ObjectDisposedException.也许您希望捕获该异常并将其视为"侦听器套接字已关闭"消息.

您的代码的另一个问题是main_socket实际上没有连接到任何东西.在Disconnect_Click()中调用main_socket.Shutdown()可能也会抛出,但这次它应该是一个SocketException,说套接字没有连接.我会删除main_socket.Shutdown()调用.