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How can I make sure that a file inside a Dropbox is really gone after delete?

I am using files inside a Dropbox to communicate between Servers. After a while I realized that every once in a while there is a delay in the basic File operations when executed on a file inside the Dropbox.
What I need is something like this:
public class MyFile
{
const int maxWaitCount = 60;
//..
/// <summary>
/// remove file - also has to work inside Dropbox directory
/// </summary>
/// <returns>0 for ok or error code</returns>
public int rm()
{
string name = Os.winInternal(FullName);
if (File.Exists(name))
{
File.Delete(name);
#region double check if file is gone
if (Ensure)
return awaitFileVanishing(name);
#endregion
}
return 0;
}
//..
private int awaitFileMaterializing(string fileName) //..
private int awaitFileVanishing(string fileName) //..
/// <summary>
/// Constructor: auto-ensure mode for file systems that do not synchronously wait for the end of an IO operation i.e. Dropbox
/// </summary>
/// <remarks>only use the ensure mode if it has to be guaranteed that the IO operation was completely done
/// when the method call returns; necessary e.g. for Dropbox directories since (currently) Dropbox first updates the
/// file in the invisible . folder and then asynchronously updates the visible file and all the remote copies of it</remarks>
/// <param name="filename"></param>
public MyFile(string filename)
{
Ensure = filename.ToLower().Contains("dropbox");
// ..
}
}
Since I needed a quick solution, I came up with one that I am presenting as an answer to my own question below. However, I can easily imagine that some of you had this problem as well and found a different, possibly more compelling solution. Please let me know.

This is my current solution for awaitFileMaterializing and awaitFileVanishing as used as part of MyFile.
private int awaitFileMaterializing(string fileName)
{
int count = 0;
bool exists = false;
while (count < maxWaitCount)
{
try
{
exists = File.Exists(fileName);
}
catch (Exception) { } // device not ready exception if Win 2003
if (exists)
break;
Thread.Sleep(5);
count++;
}
if (count >= maxWaitCount)
throw new FileNotFoundException("ensure failed - timeout.", fileName);
return -count;
}
private int awaitFileVanishing(string fileName)
{
int count = 0;
bool exists = true;
while (count < maxWaitCount)
{
try
{
exists = File.Exists(fileName);
}
catch (Exception) { } // device not ready exception if Win 2003
if (!exists)
break;
Thread.Sleep(5);
count++;
}
if (count >= maxWaitCount)
throw new IOException("ensure failed - timeout in deleting " + fileName + ".");
return -count;
}

You can create a FileSystemWatcher to monitor your Dropbox folder. FileSystemWatcher has a deleted event that you can attach to that tells you when a file has been deleted from the folder being watched.
MSDN Source & Examples

Reasons for long-running WCF service dying?

I have a long-running WCF service, hosted in IIS, that handles printing without any user interaction. After about 2 hours of looping through 1000 print jobs, the WCF service just seems to die. The log file I track indicates that the last print job was sent to the printer, but it never returns success nor failure (again, according to the log file).
From the log file, it would normally say:
2015-12-17 19:00:23,673 [27] INFO Barn.WCF.SysPrsPrintServer - Sending Print Job... PrintDocumentId=168;PrintSectionId=742;CustomerId=112702;DeliveryAddressId=474984;DocumentName=/SystemProcesses/Reports/CertificateOfRegistry;PrinterLocation=HB-MFP1;PrinterPaperSource=Cassette 3
2015-12-17 19:00:32,626 [27] INFO Barn.WCF.SysPrsPrintServer - PdfPrintHandler.Print: Printer HB-MFP1 indicates the print job is complete.
But the last log file entry is:
2015-12-17 19:00:32,688 [27] INFO Barn.WCF.SysPrsPrintServer - Sending Print Job... PrintDocumentId=169;PrintSectionId=742;CustomerId=112702;DeliveryAddressId=474984;DocumentName=/SystemProcesses/Reports/CertificateOfRegistry;PrinterLocation=HB-MFP1;PrinterPaperSource=Cassette 3
Can you see how this might be possible that I get no message back at all? Is it possible the WCF service just died or IIS recycled the app pool or something like that? So without further ado, here is my class:
using System;
using System.Collections.Generic;
using System.Drawing.Printing;
using System.IO;
using System.Threading;
using log4net;
using Aspose.Pdf.Facades;
namespace Barn.API.Print.PrintHandlers
{
public class PdfPrintHandler
{
private const int LargePdfByteCount = 3000000;
private readonly ILog _log;
private readonly ManualResetEvent _resetEvent = new ManualResetEvent(false);
public PdfPrintHandler(ILog log)
{
_log = log;
var license = new Aspose.Pdf.License();
var pathLicense = AppDomain.CurrentDomain.SetupInformation.ApplicationBase + "bin\\Aspose.Pdf.lic";
license.SetLicense(pathLicense);
}
/// <summary>
/// Prints the specified stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="printerSettings">The printer settings.</param>
/// <param name="pageSettings">The page settings.</param>
/// <param name="timeout">The timeout.</param>
/// <param name="errors"></param>
/// <returns>The status of the print job.</returns>
public PrintJobStatusEnum Print(Stream stream, PrinterSettings printerSettings, PageSettings pageSettings, PrintDocumentModel printJob, int timeout, out List<string> errors)
{
errors = new List<string>();
// Reset the wait handler to make sure the event is not signaled
_resetEvent.Reset();
// Set attributes for printing
var viewer = new PdfViewer
{
AutoResize = true,
AutoRotate = true,
PrintPageDialog = false,
PrintAsImage = false
};
// Add an event listener when print job sent to printer
viewer.EndPrint += ViewerOnEndPrint;
//Print document using printer and page settings
try
{
_log.InfoFormat("Sending Print Job... PrintDocumentId={0};PrintSectionId={1};CustomerId={2};DeliveryAddressId={3};DocumentName={4};PrinterLocation={5};PrinterPaperSource={6}",
printJob.PrintDocumentId,
printJob.PrintSectionId != null ? printJob.PrintSectionId.ToString() : "null",
printJob.CustomerId != null ? printJob.CustomerId.ToString() : "null",
printJob.DeliveryAddressId != null ? printJob.DeliveryAddressId.ToString() : "null",
printJob.DocumentName != null ? printJob.DocumentName : "null",
printJob.PrinterLocation != null ? printJob.PrinterLocation : "null",
pageSettings.PaperSource.SourceName != null ? pageSettings.PaperSource.SourceName : "null");
// Print
if (stream.Length <= LargePdfByteCount)
{
// Bind the stream then print
viewer.BindPdf(stream);
viewer.PrintDocumentWithSettings(pageSettings, printerSettings);
}
else
{
// Use a more efficient printing method with larger documents
viewer.PrintLargePdf(stream, pageSettings, printerSettings);
}
// Block until the event finishes or timeout reached
_resetEvent.WaitOne(TimeSpan.FromMinutes(timeout));
// Check the print status
if (viewer.PrintStatus != null)
{
// An exception was thrown
var ex = viewer.PrintStatus as Exception;
if (ex != null)
{
// Get exception message
_log.Error("PdfPrintHandler.Print: Print Error: " + ex.Message + ex.StackTrace, ex);
errors.Add(ex.Message);
}
return PrintJobStatusEnum.Error;
}
else
{
// No errors were found. Printing job has completed successfully
_log.InfoFormat("PdfPrintHandler.Print: Printer {0} indicates the print job is complete.", printerSettings.PrinterName);
return PrintJobStatusEnum.Printed;
}
}
catch (Exception e)
{
_log.Error("PdfPrintHandler.Print Exception: " + e.Message + e.StackTrace, e);
errors.Add(e.Message);
}
finally
{
viewer.Close();
}
return PrintJobStatusEnum.Error;
}
private void ViewerOnEndPrint(object sender, PrintEventArgs printEventArgs)
{
// Signal the event is finished
_resetEvent.Set();
}
}
}
WCF Service Interface:
using System.ServiceModel;
namespace Barn.WCF
{
// NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "ISysPrsPrintServer" in both code and config file together.
[ServiceContract]
public interface ISysPrsPrintServer
{
[OperationContract]
string DoWork(string data);
}
}

I would suggest checking the operation contracts of your print methods. I have seen WCF services fail out when the isOneWay attribute is not set or is set to false on a void method. try something like this
[OperationContract(IsOneWay=true)]
public void PrintDocumentWithSettings(PageSettings settings, PrinterSettings settings);

Here it is in the Windows event log:
A worker process with process id of '3236' serving application pool
'testws.mydomain.ca' was shutdown due to inactivity. Application Pool
timeout configuration was set to 20 minutes. A new worker process
will be started when needed.
So IIS seems to have thought that there was 20 minutes of inactivity because the WCF service is called asynchronously. The process is working away, but IIS decided to recycle the application pool in the middle of the process running.
I changed the settings in IIS on the application pool according to this:
https://serverfault.com/questions/333907/what-should-i-do-to-make-sure-that-iis-does-not-recycle-my-application

How can I log LoggingChannel LogMessages to the StorageFile?

I want to add logging of exceptions to my Windows Store App. Based on an idea from here, I've started off with this code in App.xaml.cs:
sealed partial class App : Application
{
private LoggingChannel channel;
private LoggingSession session;
/// <summary>
/// Initializes the singleton application object. This is the first line of authored code
/// executed, and as such is the logical equivalent of main() or WinMain().
/// </summary>
public App()
{
this.InitializeComponent();
this.Suspending += OnSuspending;
channel = new LoggingChannel("PlatypiChannel");
session = new LoggingSession("PlatypiSession");
session.AddLoggingChannel(channel, LoggingLevel.Error);
UnhandledException += Application_UnhandledException;
}
async private void Application_UnhandledException(object sender, UnhandledExceptionEventArgs ex)
{
ex.Handled = true;
String exceptionCornucopia = String.Format("Message0 == {0}; Message1 == {1}; HResult == {2}; Inner Ex == {3}; StackTrace == {4}", ex.Message, ex.Exception.Message, ex.Exception.HResult, ex.Exception.InnerException, ex.Exception.StackTrace);
channel.LogMessage(exceptionCornucopia, LoggingLevel.Error);
// not seeing how this saves the channel's logged messages...???
StorageFile logFile = await session.SaveToFileAsync(ApplicationData.Current.LocalFolder, "CrashLog");
}
As the comment indicates, it seems to me the last line simply saves a file named "CrashLog" to the LocalFolder. But how do the LogMessages get into that file? There is obviously a key piece missing here.

I know that this question has been open for a long time, but I just want to provide an answer for anyone else finding this.
The secret here is that the LogMessages are all written into the LoggingChannel, which itself has previously been registered with the LoggingSession:
session.AddLoggingChannel(channel, LoggingLevel.Error);
When the session is then saved to a file, it obviously knows about the associated channels and where to search for pending log messages.

SOAP service client, "No update available"

I am writing an application to consume SOAP service. The work flow is like this:
Pull in order from SOAP server (Request Order)
POST/Response with changes to SOAP server (Response to Order)
Request PO changes from server (Request order changes)
The third party server already set up a testing environment for us. The first thing
I am trying to do is request and download the order from server. But seems the problem is that I can only download/pull the order per application once. After the first time I requested the order, I will get the exception: "System.Web.Services.Protocols.SoapException: No order updates available". If I create another application do the same thing, it will be able to request the order again, but only for once. Is there any place I can set/config so that my application could pull order regardless it is an newer order or not, or it's something to do with the server side?
The test code I am pulling order:
/// <summary>
/// Used by supplier to check Order
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnRequestPO_Click(object sender, EventArgs e)
{
string t_return;
SupplierServices supplierServices = new SupplierServices();
LoginDetails lgDetails = new LoginDetails();
lgDetails.UserName = "user";
lgDetails.Password = "password";
supplierServices.LoginDetailsValue = lgDetails;
RequestPurchaseOrder requestPO = new RequestPurchaseOrder();
requestPO.SupplierCode = "1234";
try
{
Order returned_order = supplierServices.SupplierRequestPO(requestPO);
if (returned_order != null)
{
t_return = returned_order.ToString();
MessageBox.Show(t_return);
}
else
MessageBox.Show("Returned order is empty!");
}
catch (Exception ex)
{
String responseFromServer = ex.Message.ToString() + " ";
if (ex!= null)
{
MessageBox.Show(responseFromServer);
}
}

It appears from your code that the response "No order updates available" is being returned from the third party. You are going to have to ask them why you are getting that error.

How to auto-detect Arduino COM port?

I'm using an Arduino with the Firmata library for communication to a C# application, and I want to eliminate a COM port configuration component since it can change from machine to machine...
Is it possible to:
Enumerate list of COM ports in the system? (In my googling I've seen some fairly ugly Win32 API code, hoping there's maybe a cleaner version now)
Auto-detect which COM port(s) are connected to an Arduino?

This little bit of code has performed very well for this (returns the COM port string, i.e. "COM12" if Arduino is detected):
private string AutodetectArduinoPort()
{
ManagementScope connectionScope = new ManagementScope();
SelectQuery serialQuery = new SelectQuery("SELECT * FROM Win32_SerialPort");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(connectionScope, serialQuery);
try
{
foreach (ManagementObject item in searcher.Get())
{
string desc = item["Description"].ToString();
string deviceId = item["DeviceID"].ToString();
if (desc.Contains("Arduino"))
{
return deviceId;
}
}
}
catch (ManagementException e)
{
/* Do Nothing */
}
return null;
}

You can use SerialPort.GetPortNames() to return an array of string COM port names.
I dont think you can auto detect the ports, youd have to ping the device in order to see if the device is connected.

Taking the WMI Management route a bit further, I've come up with a wrapper class which hooks on to the Win32_SerialPorts events and dynamically populated a list of SerialPorts for Arduino and Digi International (X-Bee) devices, complete with PortNames and BaudRates.
For now, I've used the devices Description field in the Win32_SerialPorts entry as the Key for the Dictionary, but this can easily be changed.
It has been tested to a limited capacity with an Arduino UNO and it seems to be stable.
// -------------------------------------------------------------------------
// <copyright file="ArduinoDeviceManager.cs" company="ApacheTech Consultancy">
// Copyright (c) ApacheTech Consultancy. All rights reserved.
// </copyright>
// <license type="GNU General Public License" version="3">
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see http://www.gnu.org/licenses
// <license>
// -------------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.IO.Ports;
using System.Linq;
using System.Management;
using System.Runtime.CompilerServices;
// Automatically imported by Jetbeans Resharper
using ArduinoLibrary.Annotations;
namespace ArduinoLibrary
{
/// <summary>
/// Provides automated detection and initiation of Arduino devices. This class cannot be inherited.
/// </summary>
public sealed class ArduinoDeviceManager : IDisposable, INotifyPropertyChanged
{
/// <summary>
/// A System Watcher to hook events from the WMI tree.
/// </summary>
private readonly ManagementEventWatcher _deviceWatcher = new ManagementEventWatcher(new WqlEventQuery(
"SELECT * FROM Win32_DeviceChangeEvent WHERE EventType = 2 OR EventType = 3"));
/// <summary>
/// A list of all dynamically found SerialPorts.
/// </summary>
private Dictionary<string, SerialPort> _serialPorts = new Dictionary<string, SerialPort>();
/// <summary>
/// Initialises a new instance of the <see cref="ArduinoDeviceManager"/> class.
/// </summary>
public ArduinoDeviceManager()
{
// Attach an event listener to the device watcher.
_deviceWatcher.EventArrived += _deviceWatcher_EventArrived;
// Start monitoring the WMI tree for changes in SerialPort devices.
_deviceWatcher.Start();
// Initially populate the devices list.
DiscoverArduinoDevices();
}
/// <summary>
/// Gets a list of all dynamically found SerialPorts.
/// </summary>
/// <value>A list of all dynamically found SerialPorts.</value>
public Dictionary<string, SerialPort> SerialPorts
{
get { return _serialPorts; }
private set
{
_serialPorts = value;
OnPropertyChanged();
}
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public void Dispose()
{
// Stop the WMI monitors when this instance is disposed.
_deviceWatcher.Stop();
}
/// <summary>
/// Occurs when a property value changes.
/// </summary>
public event PropertyChangedEventHandler PropertyChanged;
/// <summary>
/// Handles the EventArrived event of the _deviceWatcher control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArrivedEventArgs"/> instance containing the event data.</param>
private void _deviceWatcher_EventArrived(object sender, EventArrivedEventArgs e)
{
DiscoverArduinoDevices();
}
/// <summary>
/// Dynamically populates the SerialPorts property with relevant devices discovered from the WMI Win32_SerialPorts class.
/// </summary>
private void DiscoverArduinoDevices()
{
// Create a temporary dictionary to superimpose onto the SerialPorts property.
var dict = new Dictionary<string, SerialPort>();
try
{
// Scan through each SerialPort registered in the WMI.
foreach (ManagementObject device in
new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_SerialPort").Get())
{
// Ignore all devices that do not have a relevant VendorID.
if (!device["PNPDeviceID"].ToString().Contains("VID_2341") && // Arduino
!device["PNPDeviceID"].ToString().Contains("VID_04d0")) continue; // Digi International (X-Bee)
// Create a SerialPort to add to the collection.
var port = new SerialPort();
// Gather related configuration details for the Arduino Device.
var config = device.GetRelated("Win32_SerialPortConfiguration")
.Cast<ManagementObject>().ToList().FirstOrDefault();
// Set the SerialPort's PortName property.
port.PortName = device["DeviceID"].ToString();
// Set the SerialPort's BaudRate property. Use the devices maximum BaudRate as a fallback.
port.BaudRate = (config != null)
? int.Parse(config["BaudRate"].ToString())
: int.Parse(device["MaxBaudRate"].ToString());
// Add the SerialPort to the dictionary. Key = Arduino device description.
dict.Add(device["Description"].ToString(), port);
}
// Return the dictionary.
SerialPorts = dict;
}
catch (ManagementException mex)
{
// Send a message to debug.
Debug.WriteLine(#"An error occurred while querying for WMI data: " + mex.Message);
}
}
/// <summary>
/// Called when a property is set.
/// </summary>
/// <param name="propertyName">Name of the property.</param>
[NotifyPropertyChangedInvocator]
private void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
var handler = PropertyChanged;
if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}

Try this, I'm working on a very similar project, also anyone please feel free to edit this!
In the setup portion of the Arduino code, I have it call a setupComms() method, this method simply prints an "A" until it receives an "a". Once "a" is received it jumps to the main loop() function. So the C# portion checks each available port for "A" and if "A" is found we know that we have opened the port to the Arduino!
Again, this may not be very clean but it does work, I am open to any comments and suggestions!
foreach (string s in SerialPort.GetPortNames())
{
com.Close(); // To handle the exception, in case the port isn't found and then they try again...
bool portfound = false;
com.PortName = s;
com.BaudRate = 38400;
try
{
com.Open();
status.Clear();
status.Text += "Trying port: " + s+"\r";
}
catch (IOException c)
{
status.Clear();
status.Text += "Invalid Port"+"\r";
return;
}
catch (InvalidOperationException c1)
{
status.Clear();
status.Text += "Invalid Port" + "\r";
return;
}
catch (ArgumentNullException c2)
{
// System.Windows.Forms.MessageBox.Show("Sorry, Exception Occured - " + c2);
status.Clear();
status.Text += "Invalid Port" + "\r";
return;
}
catch (TimeoutException c3)
{
// System.Windows.Forms.MessageBox.Show("Sorry, Exception Occured - " + c3);
status.Clear();
status.Text += "Invalid Port" + "\r";
return;
}
catch (UnauthorizedAccessException c4)
{
//System.Windows.Forms.MessageBox.Show("Sorry, Exception Occured - " + c);
status.Clear();
status.Text += "Invalid Port" + "\r";
return;
}
catch (ArgumentOutOfRangeException c5)
{
//System.Windows.Forms.MessageBox.Show("Sorry, Exception Occured - " + c5);
status.Clear();
status.Text += "Invalid Port" + "\r";
return;
}
catch (ArgumentException c2)
{
//System.Windows.Forms.MessageBox.Show("Sorry, Exception Occured - " + c2);
status.Clear();
status.Text += "Invalid Port" + "\r";
return;
}
if (!portfound)
{
if (com.IsOpen) // Port has been opened properly...
{
com.ReadTimeout = 500; // 500 millisecond timeout...
sent.Text += "Attemption to open port " + com.PortName + "\r";
try
{
sent.Text += "Waiting for a response from controller: " + com.PortName + "\r";
string comms = com.ReadLine();
sent.Text += "Reading From Port " + com.PortName+"\r";
if (comms.Substring(0,1) == "A") // We have found the arduino!
{
status.Clear();
status.Text += s + com.PortName+" Opened Successfully!" + "\r";
//com.Write("a"); // Sends 0x74 to the arduino letting it know that we are connected!
com.ReadTimeout = 200;
com.Write("a");
sent.Text += "Port " + com.PortName + " Opened Successfully!"+"\r";
brbox.Text += com.BaudRate;
comboBox1.Text = com.PortName;
}
else
{
sent.Text += "Port Not Found! Please cycle controller power and try again" + "\r";
com.Close();
}
}
catch (Exception e1)
{
status.Clear();
status.Text += "Incorrect Port! Trying again...";
com.Close();
}
}
}
}
All of the Try Catch statements are in there from when I was originally testing, this has worked for me so far. Good luck!

I just had a similar challenge with a Teensyduino communicating with a PC based processing language program. It may be useful for someone working with something Java or processing language rather than C#.
The basic idea of this solution was to send a handshake request ("!sh\n") to each Serial port and then listen for a response ("$h\n") from each device until the correct handshake response was received. Thereby showing which of the ports was the device I was seeking.
Also, I'm quite new to StackOverflow so please forgive and educate me if I'm breaking any StackOverflow etiquette in this answer.
Processing Language Code:
import processing.serial.*;
int ellipticalWalkerTeensyIndex; /* Represents Elliptical Walker Serial Port index in the Serial.list() String array. */
boolean latch;
String[] serialPortList = Serial.list();
int serialPortCount = serialPortList.length;
Serial[] ports = new Serial[serialPortCount];
int[] serialConnected = new int[serialPortCount];
void setup(){
for (int z = 0; z < serialPortCount; ++z) { /* Initialise serialConnected array to 0; Anything not marked to 1 later will be ignored. */
serialConnected[z] = 0;
}
ellipticalWalkerTeensyIndex = -1; /* Initialise ellipticalWalkerTeensyIndex to -1, as the correct serial port is not yet known. */
latch = false;
for (int z = 0; z < serialPortCount; ++z) {
try {
ports[z] = new Serial(this, serialPortList[z], 9600);
serialConnected[z] = 1; /* Mark this index as connected. */
ports[z].write("!sh"); /* Send handshake request; Expected response is "$h\n" */
}catch (Exception e){
println("Could not connect to "+Integer.toString(z)+" exception details: "+e);
}
}
}
void draw(){
if (ellipticalWalkerTeensyIndex < 0) {
for (int z = 0; z < serialPortCount; ++z) {
if(serialConnected[z]>0){ /* Only attempt communication if we have marked this serial port as connected during the setup routine. */
if (ports[z].available()>0) { /* Read from serial port 'z' if data is available. */
String lineOfData = ports[z].readStringUntil('\n');
if(lineOfData.charAt(0)=='$' && lineOfData.charAt(1)=='h'){ /* Check if received response matches expected handshake response */
ellipticalWalkerTeensyIndex = z; /* Note the correct serial port for the teensy. */
}
}
}
}
}else{
if (!latch) {
println("The teensyduino is on serial port: "+serialPortList[ellipticalWalkerTeensyIndex]);
latch = true;
exit();
}
}
}
Runtime results:
PS C:\repos\elliptical_walker> processing-java --sketch=c:\repos\elliptical_walker\EW0 --run
The teensyduino is on serial port: COM3
Finished.

I've noticed that my Chinese clone of Arduino nano shows up the COM port correctly in Devices Manager, but it doesn't show on the C# app dorp down list when you try and get all ports using this command:
using (var searcher = new ManagementObjectSearcher("SELECT * FROM WIN32_SerialPort"));
However, it is shown correctly when executing:
foreach (string z in SerialPort.GetPortNames())
So I have 2 lists: one with output of 1st code, and one with output from 2nd code. When comparing both, it will find the correct COM port. Obviously, when using Original Andurino Uno both commands displays port correctly so this solution will only work for Chinese clones which, for some odd reason, are invisible to using (var searcher = new ManagementObjectSearcher("SELECT * FROM WIN32_SerialPort"));

This method does not help you find out which port your arduino is connected to your computer
SerialPort.GetPortNames Method ()
// Get a list of serial port names.
string[] ports = SerialPort.GetPortNames();
Console.WriteLine("The following serial ports were found:");
Console.WriteLine("Aşşağıda Seri Bağlantı Noktaları Bulundu:");//For Turkish
// Display each port name to the console.
foreach(string port in ports)
{
Console.WriteLine(port);
}
Console.ReadLine();

With this php script you can transmit and receive data from arduino
<?php
/**
* Remember to go to Device Manager> Ports (COM & LPT)>Arduino XXX (COMXX)>right
* click>Properties>
* Port Settings>Advanced>uncheck "use FIFO buffers ........."
* In other hand, remeber that the Tx speed has to be the same in PhpConnect.php, in
* Arduino sketch and in the COM
* properties in Device manager, I selected 115200 b/s.
*
*/
// RX form PC**************
$t = $_POST['text1'];
include 'PruebaBatchCOM.php';
$puerto = escapeshellarg($usbCOM);
$dato = escapeshellarg($t);
exec("node C:\\xampp\\htdocs\\DisenoWEBTerminados\\BatteryTester\\Scripts\\writeandread.js {$puerto} {$dato} 2>&1", $output1);
$str = implode($output1);
$str1 = explode(",",$str);
$myJSON = json_encode($str1);// this is the response to AJAX
echo $myJSON;
?>
PruebaBatchCOM.php is
<?php
$puerto = array();
$file111 = "PruebaCOMRetrieve.bat";
exec($file111, $puerto);
$usbCOM = implode(",",$puerto);
?>
PruebaCOMRetrieve.bat
#echo off
setlocal
for /f "tokens=1* delims==" %%I in ('wmic path win32_pnpentity get caption
/format:list ^| find "Arduino Uno"') do (
call :setCOM "%%~J"
)
:: end main batch
goto :EOF
:setCOM <WMIC_output_line>
:: sets _COM#=line
setlocal
set "str=%~1"
set "num=%str:*(COM=%"
set "num=%num:)=%"
set port=COM%num%
echo %port%