如何重用插座.NET？ [英] How to reuse socket in .NET?

问题描述

我尝试重新连接到我从断开的插槽，但它不会允许它由于某种原因，即使我叫Disconnect方法与参数reuseSocket设置为true。

  _socket =新的Socket（AddressFamily.InterNetwork，SocketType.Stream，ProtocolType.Tcp）;
_socket.Connect（ip地址，端口）;
//...receive数据
_socket.Disconnect（真正的）; // reuseSocket =真
//...等待
_socket.Connect（ip地址，端口）; //引发InvalidOperationException：
 

  

在插座已经断开，   你只能再次重新连接   异步的，只有一个   不同的端点。 BeginConnect绝   被称为一个线程，不会退出   直到操作一直   完成。

我是什么做错了吗？

解决方案

阅读MSDN文档的 Socket.Disconnect 我注意到一些可能会造成您的问题。

  

如果您需要致电断开不先调用关机，可以设定 SocketOption 名为 DontLinger 以假并指定一个非零的超时间隔，以确保数据排队等待出站发送传输。   断开然后阻塞，直到数据被发送或直到指定超时过期。如果设置DontLinger为false，并且指定了零超时间隔，关闭释放连接，并自动放弃传出排队数据。

尝试将 DontLinger 套接字选项，并指定0超时或使用关闭调用断开连接。<前/ P>

I am trying to reconnect to a socket that I have disconnected from but it won't allow it for some reason even though I called the Disconnect method with the argument "reuseSocket" set to true.

_socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
_socket.Connect(ipAddress, port);
//...receive data
_socket.Disconnect(true); //reuseSocket = true
//...wait
_socket.Connect(ipAddress, port); //throws an InvalidOperationException:

Once the socket has been disconnected, you can only reconnect again asynchronously, and only to a different EndPoint. BeginConnect must be called on a thread that won't exit until the operation has been completed.

What am I doing wrong?

解决方案

After reading the MSDN documentation for Socket.Disconnect I noticed something that might be causing your issue.

If you need to call Disconnect without first calling Shutdown, you can set the SocketOption named DontLinger to false and specify a nonzero time-out interval to ensure that data queued for outgoing transmission is sent. Disconnect then blocks until the data is sent or until the specified time-out expires. If you set DontLinger to false and specify a zero time-out interval, Close releases the connection and automatically discards outgoing queued data.

Try setting the DontLinger Socket option and specify a 0 timeout or use Shutdown before you call disconnect.

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