CODEWITHSUNDEEP
c#io
dbomb101
dbomb101

Reputation: 423

Serial Port unauthorized access exception

I'm trying to read in some information from a serial port, but when I actually to open a connnection it throws a unauthorized access exception

This code reads in the port names 

        SerialPort port = new SerialPort();
        string[] serialPorts = System.IO.Ports.SerialPort.GetPortNames();


        public Page_Main()
        {
            InitializeComponent();

            for (int i = 0; i < serialPorts.Count(); i++)
                portBox.Items.Add(serialPorts[i]);
        }

This is the code which tries to the the information coming from the serial port 

            port.PortName = portBox.SelectedItem.ToString();
            port.BaudRate = 9600;
            port.DataBits = 8;
            port.Parity = Parity.None;
            port.StopBits = StopBits.One;

            port.Open();// This is where the exception is thrown

            serialOutput.Text = port.ReadLine();

Upvotes: 3

Views: 5432

Answers (1)

KevinDTimm
KevinDTimm

Reputation: 14376

Access is denied to the port.

  • or -

The current process, or another process on the system, already has the specified COM port open either by a SerialPort instance or in unmanaged code.

Upvotes: 2

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