NFC Application for testing NFC device arrival/departure

Question

Hi,

I want to develop a c# library in VS 2013 .Net 4.0 for NFC device arrival / departure.

I tried the following code but I'm not able to invoke "device arrival" event. 

I took the code from : 

http://msdn.microsoft.com/en-US/library/windows/apps/windows.networking.proximity.devicearrivedeventhandler.aspx

Code #########

using system;

using system.IO;

using system.Management;

using windows.networking.proximity;

using system.threading.Tasks;

namespace nfcDeviceArrival

{

public class NearfieldProximity

{

windows.networking.proximity.proximityDevice _proximityDevice;

public void nfcDevicearrive()

{

_ProximityDevice=windows.netwotrking.proximity.proximityDevice.Getdefault();

		if (proximityDevice != null) 
			{
        			proximityDevice.DeviceArrived += ProximityDeviceArrived;
       		 		proximityDevice.DeviceDeparted += ProximityDeviceDeparted;
        			console.writeline("NFC Device Detected");
			   console.writeline("Please tap NFC device ");				
    			}
			public void ProximityDeviceArrived(ProximityDevice sender)
			{
				console.writeline("NFC device Arrived");
			}
	}
}
from the above code I'm not able to execute "ProximityDeviceArrived event" and i'm not getting prinitng statement "NFC device Arrived".
All I want is C# code that should print a "NFC device Arrived" message in cmd prmpt when I bring NFC device near NFC antenna.
Thanks,
Devanathan.D
reach me @ : [e-mail]
			

Answer 1

Does the sample code work?

---

Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.

NOTE: If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined objects and unknown namespaces.

Answer 2

(1)for Windows Runtime Apps (Windows 8, Windows 8.1, Windows Phone 8.1 base on Windows Runtime)

 public sealed partial class MainPage : Page
    {
        private ProximityDevice proximitydevice;
        public MainPage()
        {
            this.InitializeComponent();
            proximitydevice = ProximityDevice.GetDefault();
            if (proximitydevice != null)
            {
                proximitydevice.DeviceArrived += proximitydevice_DeviceArrived;
                proximitydevice.DeviceDeparted += proximitydevice_DeviceDeparted;
            }
            else
            { msgtxt.Text = "No NFC Device"; }
        }
        async private void proximitydevice_DeviceDeparted(ProximityDevice sender)
        { await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => WriteMessage("Departed")); }

        async private void proximitydevice_DeviceArrived(ProximityDevice sender)
        { await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => WriteMessage("Arrived")); }

        private void WriteMessage(String message)
        { msgtxt.Text = message; }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            
        }
    }

(2) for Windows Phone Silverlight Apps (Windows Phone 8.0/8.1 Silverlight)

public partial class MainPage : PhoneApplicationPage
    {
        private ProximityDevice proximitydevice;
        public MainPage()
        {
            InitializeComponent();
            proximitydevice = ProximityDevice.GetDefault();
            if (proximitydevice != null)
            {
                proximitydevice.DeviceArrived += proximitydevice_DeviceArrived;
                proximitydevice.DeviceDeparted += proximitydevice_DeviceDeparted;
                           
            }
            else
            { MessageBox.Show("No NFC Device"); }
        }


        async private void proximitydevice_DeviceDeparted(ProximityDevice sender)
        {
            Windows.UI.Core.CoreDispatcher x = Windows.UI.Core.CoreWindow.GetForCurrentThread().Dispatcher;
            await x.RunAsync(CoreDispatcherPriority.Normal, () => WriteMessage("Departed"));
        }

        async private void proximitydevice_DeviceArrived(ProximityDevice sender)
        {
            Windows.UI.Core.CoreDispatcher x = Windows.UI.Core.CoreWindow.GetForCurrentThread().Dispatcher;
            await x.RunAsync(CoreDispatcherPriority.Normal, () => WriteMessage("Arrived"));
        }


        private void WriteMessage(string message)
        { msgtxt.Text = message; }
    }

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Answer 3

Hi devaa,

Just a note: Windows Store App is running over .net framework 4.5 and above but not .net 4.0

--James

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MSDN Community Support

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