C# 检查 COM(串行)端口是否已打开 [英] C# check if a COM (Serial) port is already open

问题描述

是否有一种简单的方法可以以编程方式检查串行 COM 端口是否已打开/正在使用?

Is there an easy way of programmatically checking if a serial COM port is already open/being used?

通常我会使用:

try
{
    // open port
}
catch (Exception ex)
{
    // handle the exception
}

但是，我想以编程方式进行检查，以便尝试使用其他 COM 端口或类似的端口.

However, I would like to programatically check so I can attempt to use another COM port or some such.

推荐答案

前段时间我需要类似的东西来搜索设备.

I needed something similar some time ago, to search for a device.

我获得了可用 COM 端口的列表，然后简单地迭代它们，如果它没有引发异常，我尝试与设备通信.有点粗糙但工作.

I obtained a list of available COM ports and then simply iterated over them, if it didn't throw an exception i tried to communicate with the device. A bit rough but working.

var portNames = SerialPort.GetPortNames();

foreach(var port in portNames) {
    //Try for every portName and break on the first working
}

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