TCPClient状态无变化 [英] TCPClient status no change

问题描述

我能够使用TCPClient打开连接，它能够读取和写入数据或字符串，但是当我关闭远程设备或拔掉网络电缆时，请检查client.connected属性，它总是显示 ;真" ;.会发生什么事？谢谢

I was able to open a connection using TCPClient, it is able to read and write data or string, however when I turn off the remote device or unplug the network cable, then check the client.connected property, it always shows "True". what could be happened? Thanks

推荐答案

连接属性只反映了最后一次读取或写入操作，我以前认为它使它变得无用。在属性发生变化之前，您必须尝试在已关闭的套接字上进行读/写。


幸运的是，我编写了以下函数，我觉得它运行得相当好。

The connection property is only reflective of the "last read or write operation", which I presonally feel makes it rather useless. You have to try to read/write on a closed socket before it the property changes.

Fortunatly I wrote the following function that I think works rather well.

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谢谢，

但我正在使用VB2005，是否有与s类似的功能VB中的.poll（）？顺便说一下民意调查功能在做什么？


谢谢

Thank you,

But I''m using VB2005, is there a similar function as s.poll( ) in VB? by the way what is the poll function doing?

Thanks

所有这些都在.NET中可用。因此无论是VB.NET还是C＃，您仍然可以使用这些调用。你可以查看msdn上的Poll（）函数
（只需要改成VB.NET语法）


编辑：快速在线转换产生这个，应该非常接近。

All of that is available in .NET. So whether its VB.NET or C#, you can still use the calls. You can check the Poll() function on msdn
(Just need to change to VB.NET syntax)

Quick online convert produced this, should be pretty close.

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