TCP客户端异步套接字回调 [英] TCP client Asynchronous socket callback

问题描述

请注意一个问题是关于只在插座使用异步回调模式！

我想建立一个TCP客户端在接收到数据包会通知我，当我套接字被关闭，因为NET提供带beginRecv的feautures，endRecv不连接是否仍然可用通知。

I want to build a TCP client that will notify me when a packet is received and when i the socket is being closed,because the feautures that NET offers with beginRecv,endRecv doesn't inform if the connection is still available.

我的问题：
是不是有一种方法来创建一个TCP客户端就像使用WinAPI的？

My question: Isn't there a way to create a TCP client much like using WinAPI?

我的意思是调用WSAAsyncSelect一条消息，当接收到消息，它调用你叫WSAAsyncSelect功能，然后就可以看到连接是否被关闭或有通过WParams FD_CLOSE FD_READ FD_WRITE一个新的数据包。

I mean calling WSAAsyncSelect with a message,when the message is received it calls the function you've called in WSAAsyncSelect and then you can see whether the connection is closed or there's a new packet through the WParams FD_CLOSE FD_READ FD_WRITE.

如果有我isn't.Can't控制自己的同时连接，我的传入数据包？我不想叫BeginRecv EndRecv所有的时间。 -.-

If there isn't.Can't I control my connection and my incoming packets at the same time? I don't want to call BeginRecv EndRecv all the time. -.-

在此先感谢！

推荐答案

如果你传递一个状态对象，其中包括到你的插座参考，您将有机会获得插座本身。

If you pass a state object which includes a reference to your socket, You'll have access to the socket itself.

public class SocketState
{
  public SocketState(Socket s)
  {
    this._socket = s;
  }

   private Socket _socket;
   public Socket Socket
   {
     get{return _socket;}
   }
}


void SomeFunction()
{
//do some stuff in your code

SocketState stateObject = new SocketState(mySocket);
mySocket.BeginReceive(buffer, offset, size, flags, CallBack, stateObject);
//do some other stuff
}

public void CallBack(IAsyncResult result)
{
  SocketState state = (SocketState)result.AsyncState;
  state.Socket.EndReceive(result);

  //do stuff with your socket.
  if(state.Socket.Available)
    mySocket.BeginReceive(buffer, offset, size, flags, CallBack, state);
}

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