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Using SerialPort variable through MainWindow

By : Ryan Schaffner
Date : August 02 2020, 11:00 AM
I hope this helps . return an instance of SerialPort from method and store it in a window field instead of local variable:
code :
private SerialPort CheckPort()
    string[] listPort = SerialPort.GetPortNames();
    foreach(string namePort in listPort)
        SerialPort port = new SerialPort(namePort, 9600);
        if (!port.IsOpen)
            string data = port.ReadTo("\r\n");
            if (data == "A")
                port.Write("777"); // to make it stop sending "A"
                return port;
    return null;

SerialPort port;

public MainWindow()
    port = CheckPort();

private void Button_ClickClose(object sender, RoutedEventArgs e)
    if (port == null) return;

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how to acces SerialPort.Flush() and SerialPort.Finalize() functions

By : Sorin Stan
Date : March 29 2020, 07:55 AM
I wish this helpful for you http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx : no Flush. You are looking at the .Net Micro Framework, which apparently does have a Flush
Finalizers are called by GC at the end of garbage collection. They aren't externally accessible by user code, nor should they be explicitly called.

node serialport not displaying serialport data in raspberryPI

By : rewol
Date : March 29 2020, 07:55 AM
Hope this helps You could see if it is a linux permission thing.
Have you installed it on you linux machine?
code :
nmp install serialport

SerialPort visible in device manager but SerialPort.Open() reports that it cannot be found

By : CenturyX476
Date : March 29 2020, 07:55 AM
I hope this helps you . Try Disable serial port from and then reenable. Also check whether problem with hardware. You can check it by inserting usb device in serial port. If works proper. Use debugger to check code.

DataBinding C# ObservableCollection SerialPort to Combobox (SerialPort.getPortNames=>Method that return array of stri

By : Kate Penrose
Date : March 29 2020, 07:55 AM
should help you out initalize the ObservableCollection of string and give the list of ports.
code :
public ObservableCollection<String> ListOfAvaliablePorts { get; set; }

 ListOfAvaliablePorts = new ObservableCollection<String>(SerialPort.GetPortNames());

.NET CORE(on windows), DataReceived called frequency of one serialPort effected by other serialPort

By : John Hanson
Date : March 29 2020, 07:55 AM
hope this fix your issue After some testing and post from web, I confirmed this behavior on .NET CORE, that multiple SerialPort write&receive could delay the firing of the DataReceived, so rather than wait, I've added a code to actively pull
code :
    public void Start()
        this.comPort.DataReceived += (_,__)=>{this.PullPortDataBuffer();};
        //for very fast time accurate call(my app send&receive data every 200ms), use dedicated thread rather than timer.
        this.pullingSerialPortBufferLoop = new Thread(() =>
            while (true)
    var buffer = new List<byte>();
    private void PullPortDataBuffer()
        if (0 == Interlocked.CompareExchange(ref this.onPullingComPortBuffer, 1, 0))

                while (this.comPort.BytesToRead > 0)

            catch (Exception ex)
                this.onPullingComPortBuffer = 0;
            if (logger.IsDebugEnabled)
                logger.Debug(this.comPort.PortName + " concurrent enter Port_DataReceived");
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