I just got myself into using the SerialPort object in C# and I realised it throws an exception saying that "COM1" does not exist. I checked my device manager to see what COM ports I can use, but is there a way to find out what COM ports are available and programmatically select one of them?
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3 Answers
Yes, use SerialPort.GetPortNames(), which returns an array of strings of available port names.
Then create your SerialPort object by specifying one of the names in the constructor.
string[] ports = SerialPort.GetPortNames();
SerialPort port = new SerialPort(ports[0]); // create using first existing serial port, for example
1 Comment
92AlanC
Thank you very much, it worked. In my problem I created a method called USBValidator, it has a 'for' loop with i starting at 0 and ending at SerialPort.GetPortNames().Length. Inside that loop I put USB.PortName = SerialPort.GetPortNames()[i], which automatically made my serial port be assigned to the right COM port.
Here is another way
bool portExists = SerialPort.GetPortNames().Any(x => x == "COM1");
One-liner :
if(SerialPort.GetPortNames().ToList().Contains(comportName))
{
port = new SerialPort(comportName)
}
1 Comment
Sikander Hayyat
this is way better than any other.