Checking COM Port Availability in C#

Question

My C# application populates a comboBox with the COM ports found on the system. I would like the mark the COM ports that are in use as such. I know that I can use try / catch blocks to attempt to open every COM port, but I was wondering if there is a more graceful way to do this. Perhaps using a WMI query? I am using Microsoft Visual C# 2008 Express Edition (.NET 2.0). Any thoughts or suggestions you may have would be appreciated. Thanks.

Stephen Cleary · Accepted Answer · 2010-05-20 14:09:40Z

2

I'm not aware of any other method to do this. Attempting to open them is the way that native code does the same check.

answered May 20, 2010 at 14:09

Stephen Cleary

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Kris · Accepted Answer · 2015-04-07 16:38:17Z

0

I know this a Old. But there is now a really easy way to do this. You can check if a port is open with:

if (serialPort1.IsOpen)
{
    ("Port Open");
}

edited Apr 7, 2015 at 16:38

Kris

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answered Apr 7, 2015 at 16:01

Paul Brady

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