套接字编程：暂停后向套接字发送数据/接收数据 [英] socket programming: sending data/receiving data to socket after pause

问题描述

我有这个gui，我使用TcpClient连接到一个设备。一切都有效，除非我在长时间停顿后发送/接收数据。例如，假设我向设备发送hello，然后再等待60秒再发送一次。我会得到

I have this gui where I used TcpClient to connect to a a device. Everything works except when I am sending/receiving data after a long pause. For example, lets say I send "hello" to the device and then wait 60 seconds before I send it again. I would get

InvalidOperationException

或

IOException

这是有意义的，因为套接字时间当它长时间不做任何事情时。有没有办法防止这种情况发生，或者我是否必须捕获这些异常并重新建立连接？



提前感谢

which make sense because the socket times out when its not doing anything for a long period. Is there a way to prevent this from happening or do I have to catch those exceptions and re-establish the connection?

thanks in advance

推荐答案

您需要重新建立连接。通常，TCP连接将在30秒后超时。大多数TCP程序都使用序列open - send - close进行编码。

You need to re-establish connection. Typically a TCP connection will time out after 30 seconds. Most TCP programs are coded with the sequence open - send - close.

您可能想要重新考虑您的gui。只需一个发送按钮，当用户点击它时，连接 - 发送数据 - 然后断开连接。

You may want to rethink your gui. Just have a send button, and when the user hits it, connect - send the data - then disconnect.

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