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Trouble Enumerating BLE devices in Win32 Desktop Application Using UWP APIs

I am trying to add BLE functionality into a classic (WinForms?) C# desktop application, and have added references (Windows.winmd and System.Runtime.WindowsRuntime) to allow me to access the new BLE API recently introduced by Microsoft for Windows 10 UWP applications. I need to create a classic desktop application, as I need to use an older driver device wrapper (teVirtualMIDI) and want to create a .exe, not an app package.
I am referencing the aformentioned libraries from the following locations...
C:\Program Files (x86)\Windows Kits\10\UnionMetadata\Facade\Windows.WinMD
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETCore\v4.5\System.Runtime.WindowsRuntime.dll
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETCore\v4.5\System.Runtime.WindowsRuntime.UI.Xaml.dll
At this point, I simply want to be able to view connected services and characteristics in the debug output window, as is done in this blog post...
https://blogs.msdn.microsoft.com/cdndevs/2017/04/28/uwp-working-with-bluetooth-devices-part-1/
It seems that I am getting errors because the BLE API needs to perform async operations, but I am honestly at a loss. The code I have written so far is included below. Essentially, I am receiving errors when trying to call the "GetGattServicesAsync()" method, as Visual Studio says that class "BluetoothLEDevice" does not contain such a definition. That method is included in the online documentation though, and I am wondering why I am not able to access it.
I hope I have given sufficient information, and any help in solving this problem will be more than appreciated. Thank you all for all the helpful advice you give!
using System;
using System.Diagnostics;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.InteropServices;
using Windows.Devices.Bluetooth;
using Windows.Devices.Midi;
using Windows.Devices.Bluetooth.Advertisement;
using Windows.Devices.Bluetooth.GenericAttributeProfile;
using Windows.Devices.Enumeration;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Storage.Streams;
using Windows.UI.Core;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;
namespace BDBMidiClient
{
public class BLEHandlingDiscovery : Page
{
//private ObservableCollection<BluetoothLEAttributeDisplay> ServiceCollection = new ObservableCollection<BluetoothLEAttributeDisplay>();
//private ObservableCollection<BluetoothLEAttributeDisplay> CharacteristicCollection = new ObservableCollection<BluetoothLEAttributeDisplay>();
public ObservableCollection<BluetoothLEDeviceDisplay> KnownDevices = new ObservableCollection<BluetoothLEDeviceDisplay>();
//private List<DeviceInformation> UnknownDevices = new List<DeviceInformation>();
//private DeviceWatcher deviceWatcher;
//private BluetoothLEDevice bluetoothLeDevice = null;
//private GattCharacteristic selectedCharacteristic;
private void StartBLEDeviceWatcher()
{
string[] requestedProperties = { "System.Devices.Aep.DeviceAddress", "System.Devices.Aep.IsConnected" };
DeviceWatcher deviceWatcher =
DeviceInformation.CreateWatcher(
BluetoothLEDevice.GetDeviceSelectorFromPairingState(false),
requestedProperties,
DeviceInformationKind.AssociationEndpoint);
/*
DeviceWatcher deviceWatcher =
DeviceInformation.CreateWatcher(
"System.ItemNameDisplay:~~\"BDB\"",
requestedProperties,
DeviceInformationKind.AssociationEndpoint);*/
deviceWatcher.Added += DeviceWatcher_Added;
deviceWatcher.Updated += DeviceWatcher_Updated;
deviceWatcher.Removed += DeviceWatcher_Removed;
deviceWatcher.Start();
//Debug.WriteLine(requestedProperties);
}
private async void DeviceWatcher_Added(DeviceWatcher sender, DeviceInformation deviceInfo)
{
Guid gattService = new Guid();
var device = await BluetoothLEDevice.FromIdAsync(deviceInfo.Id);
var services=await device.GetGattServicesAsync();
foreach (var service in services.Services)
{
Debug.WriteLine($"Service: {service.Uuid}");
var characteristics = await service.GetCharacteristicsAsync();
foreach (var character in characteristics.Characteristics)
{
Debug.WriteLine($"Characteristic: {character.Uuid}");
}
}
}
private void DeviceWatcher_Updated(DeviceWatcher sender, DeviceInformationUpdate deviceInfoUpdate)
{
}
private void DeviceWatcher_Removed(DeviceWatcher sender, DeviceInformationUpdate deviceInfoUpdate)
{
}
async void ConnectToBLEDevice(DeviceInformation deviceInformation)
{
BluetoothLEDevice bluetoothLeDevice = await BluetoothLEDevice.FromIdAsync("BDB");
}
private BluetoothLEDeviceDisplay FindBluetoothLEDeviceDisplay(string id)
{
foreach (BluetoothLEDeviceDisplay bleDeviceDisplay in KnownDevices)
{
if (bleDeviceDisplay.Id == id)
{
return bleDeviceDisplay;
}
}
return null;
}
}

The doc says the API belongs to "Windows 10 Creators Update (introduced v10.0.15063.0)". So please try to add the one from "C:\Program Files (x86)\Windows Kits\10\UnionMetadata\10.0.15063.0\Windows.winmd"
Here is the result from my project
You can see my code works well.

Capturing Image in Windows Service c#

I need to create an Windows Service that will capture images from camera. After serching the internet, i do not find any similar project. I decided to use Aforge.net but got stuck in how to capture image because the Bitmap is not supported in windows Service.
here is my code so far:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.Threading;
using System.Deployment;
using System.Runtime.InteropServices;
using AForge.Video;
using AForge.Video.DirectShow;
using AForge.Imaging;
namespace PCSecurityCamera
{
partial class PCSecurityCamera : ServiceBase
{
System.Timers.Timer timeDelay;
string pixDrive = "", journalLoc = "", txnDate = "", txnTime = "", txnDate1 = "";
int retVal, timeFrame = 0, count = 0, txn_count = 0, retention = 0;
string picdirectory;
int i = 0;
string[] availableCameras = new string[5];
private FilterInfoCollection VideoCaptureDevices; //stores all available camera
private VideoCaptureDevice FinalVideoSource; //stores camera to be used
public PCSecurityCamera()
{
InitializeComponent();
timeDelay = new System.Timers.Timer();
timeDelay.Elapsed += new System.Timers.ElapsedEventHandler(WorkProcess);
}
public void WorkProcess(object sender, System.Timers.ElapsedEventArgs e)
{
}
protected override void OnStart(string[] args)
{
// TODO: Add code here to start your service.
LogService("PCSecuritycamera Service is Started");
try
{
int camCount = 0;
Array.Clear(availableCameras,0,availableCameras.Length);
VideoCaptureDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
foreach(FilterInfo VideoCaptureDevice in VideoCaptureDevices)
{
availableCameras[camCount] = VideoCaptureDevice.Name.ToString();
LogService(availableCameras[camCount]);
camCount++;
}
if (availableCameras[0] == "")
{
LogService("No Available Camera");
}
else
{
FinalVideoSource = new VideoCaptureDevice(VideoCaptureDevices[0].MonikerString);
LogService("Camera Selected: " + FinalVideoSource.ToString());
FinalVideoSource.NewFrame +=FinalVideoSource_NewFrame;
}
}
catch (Exception e)
{
LogService(e.ToString());
}
timeDelay.Enabled = true;
}
private void FinalVideoSource_NewFrame(object sender, NewFrameEventArgs eventArgs)
{
}
protected override void OnStop()
{
// TODO: Add code here to perform any tear-down necessary to stop your service.
LogService("Service Stoped");
timeDelay.Enabled = false;
}
private void LogService(string content)
{
FileStream fs = new FileStream(#"C:\Users\talatj\Desktop\Me\ServiceLog.txt", FileMode.OpenOrCreate, FileAccess.Write);
StreamWriter sw = new StreamWriter(fs);
sw.BaseStream.Seek(0, SeekOrigin.End);
sw.WriteLine(content);
sw.Flush();
sw.Close();
}
}
}
my problem is how to capture the image in windows service.
Please help

System.Drawing Namespace
Classes within the System.Drawing namespace are not supported for use
within a Windows or ASP.NET service. Attempting to use these classes
from within one of these application types may produce unexpected
problems, such as diminished service performance and run-time
exceptions. For a supported alternative, see Windows Imaging
Components.
GDI+
GDI+ functions and classes are not supported for use within a Windows
service. Attempting to use these functions and classes from a Windows
service may produce unexpected problems, such as diminished service
performance and run-time exceptions or errors
HOWEVER!
System.Drawing does work in Services, it's just not supported. There can be issues with high load (running out of unmanaged resources), memory or resource leaks (badly implemented or called dispose patterns)
My suspicions is you have just not referenced the System.Drawing.dll
Note : You will just have to be wary and do this on a trial and error basis, though IMO saving bitmaps should be fine

TestStack.White and CCleaner

I've very new to the TestStack (White) UI Automation library and I'm having a bit of an issue in terms of "hooking" the process. I'm trying to hook CCleaner, but I keep getting
An unhandled exception of type 'TestStack.White.AutomationException'
occurred in TestStack.White.dll
Additional information: Couldn't find window with title Piriform
CCleaner in process 1156, after waiting for 30 seconds:
My current code is:
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;
using TestStack.White;
using TestStack.White.Factory;
using TestStack.White.UIItems.Finders;
using TestStack.White.InputDevices;
using TestStack.White.UIItems.WindowItems;
namespace NightWipe
{
class Program
{
private const string ExeSourceFile = #"C:\Program Files\CCleaner\CCleaner.exe";
private static TestStack.White.Application _application;
private static TestStack.White.UIItems.WindowItems.Window _mainWindow;
static void Main(string[] args)
{
clean();
}
public static string clean()
{
var psi = new ProcessStartInfo(ExeSourceFile);
_application = TestStack.White.Application.AttachOrLaunch(psi);
_mainWindow = _application.GetWindow("Piriform CCleaner");
_mainWindow.WaitWhileBusy();
return "";
}
}
}
I thought that maybe it was the name of the process since CCleaner starts another process (not CCleaner.exe) but CCleaner64.exe as seen here, which I can assume is for 64 bit operating systems maybe? Anyway I tried names including: "CCleaner", "CCleaner64"; but this threw the same exact exception.
I'm using Inspect by Microsoft and this is what it pulls for me (large image):
Inspect's information. Any idea what I'm doing wrong here?

The problem is that CCleaner is visible as WIN32 app. So GetWindow() doesn't work. You can try this code:
public void CCleanerSample()
{
var application = Application.AttachOrLaunch(new ProcessStartInfo(#"C:\Program Files\CCleaner\CCleaner.exe"));
AutomationElement ccleanerAutomationElement = null;
Console.Write("Waiting till WIN32 app is launching");
while (ccleanerAutomationElement == null)
{
ccleanerAutomationElement = AutomationElement.RootElement.FindFirst(TreeScope.Children,
new PropertyCondition(AutomationElement.NameProperty, "Piriform CCleaner"));
Thread.Sleep(1000);
Console.Write(".");
}
Console.WriteLine(" Done");
var mainWindow = new Win32Window(ccleanerAutomationElement, WindowFactory.Desktop, InitializeOption.NoCache,
new WindowSession(application.ApplicationSession, InitializeOption.NoCache));
}

Generate a screenshot from an html page on Windows Azure

I'm trying to generate a screenshot from a html page on windows Azure.
This is the code I was using on my personal IIS and I know it works on every test machine.
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Text;
using System.Threading;
using System.Windows.Forms;
class Program
{
static void Main(string[] args)
{
new WebsiteToImage("http://www.google.com", "C:\\screenshot.jpg");
}
// Define other methods and classes here
public class WebsiteToImage
{
internal string _url;
internal string _fileName;
public WebsiteToImage(string url, string fileName)
{
_url = url;
_fileName = fileName;
// Thread
var thread = new Thread(Generate);
thread.SetApartmentState(ApartmentState.STA);
thread.Start();
thread.Join();
}
private void Generate()
{
using (var browser = new WebBrowser { ScrollBarsEnabled = false })
{
browser.Navigate(_url);
browser.DocumentCompleted += WebBrowser_DocumentCompleted;
while (browser.ReadyState != WebBrowserReadyState.Complete)
{
Application.DoEvents();
}
browser.Dispose();
}
}
private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
// Capture
using (var bmp = new Bitmap(1280, 800))
{
var browser = (WebBrowser)sender;
browser.ClientSize = new Size(1280, 800);
browser.ScrollBarsEnabled = false;
browser.BringToFront();
browser.DrawToBitmap(bmp, browser.Bounds);
var encoderParameters = new EncoderParameters(1);
encoderParameters.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 100L);
bmp.Save(_fileName, ImageCodecInfo.GetImageDecoders().FirstOrDefault(c => c.FormatID.Equals(ImageFormat.Jpeg.Guid)), encoderParameters);
}
}
}
}
Now, on Azure I know I can't use GDI+ and I'm pretty sure I can't also use WebBrowser.
Any idea or alternative solution? Even third part component.

You haven't said whether you're using Azure Web Sites or Azure Cloud Services, but from what you say about not being able to use GDI+, I'm guessing Web Sites?
You should certainly be able to run your code in a Cloud Service, either a Web or Worker role. If the code is part of a web application hosted on Web Sites, you can use an Azure Storage Queue to add the URL to be snap-shotted, then poll that queue on a worker role, run your code, and store the resulting file into Blob storage.
If your expected load on the screen-shot server is low, you could probably get away with an Extra-Small instance, which would cost very little.

Update: Awesomium should be an option in this case.

I found Is there a webservice/API to grab a screenshot of another website? and from there this service that do the task with an open source code. For the light use we're planning to do, this is better than a custom implemented solution.

SharpPcap issue

This is my first time to use SharpPcap library.
I created new project with VC# 2008 and I added SharpPcap as a reference to my project.
I post a sample code to get interface of my pc but I'm getting this error:
Error 1 The type or namespace name 'PcapDeviceList' could not be found (are you missing a using directive or an assembly reference?) C:\Users\Ali\Documents\Visual Studio 2008\Projects\Pcap\Pcap\Form1.cs 28 13 Pcap
please advice to solve this problem.
here is my code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using SharpPcap;
using SharpPcap.Packets;
using SharpPcap.Protocols;
using SharpPcap.Util;
namespace Pcap
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
/* Retrieve the device list */
PcapDeviceList devices = SharpPcap.GetAllDevices();
/*If no device exists, print error */
if (devices.Count < 1)
{
Console.WriteLine("No device found on this machine");
return;
}
int i = 0;
/* Scan the list printing every entry */
foreach (PcapDevice dev in devices)
{
/* Description */
label1.Text = "{0}) {1}" + i + dev.PcapDescription +"\n"+
/* Name */
"\tName:\t{0}" + dev.PcapName+"\n"+
/* IP Address */
"\tIP Address: \t\t{0}"+ dev.PcapIpAddress+"\n"+
/* Is Loopback */
"\tLoopback: \t\t{0}"+ dev.PcapLoopback;
i++;
}
}
}
}

What version of SharpPcap are you using?
I'm moving a small in-work project from 2.1.1 to 2.4.1, and parts of the library have changed significantly. I struggled with this myself just a bit ago.
LivePcapDeviceList devices = LivePcapDeviceList.Instance;
foreach (LivePcapDevice device in devices)
{
// Do stuff here...
}

Sorry about the API changes. I'm still trying to get the API named properly. As of v3.0 the API is considerably cleaner and should be a bit more static going forward. If you have any trouble post on the devel list or sf forums and you'll get a quick reply.
Chris
SharpPcap maintainer/author
http://sharppcap.sf.net

Try using Pcap.Net. It's a clear WinPcap wrapper in .NET.