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MainPage.xaml.cs
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MainPage.xaml.cs
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238
namespace Proximity_GetDeviceSelector1_CS
{
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page
{
public MainPage()
{
this.InitializeComponent();
}
/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached. The Parameter
/// property is typically used to configure the page.</param>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
InitializeProximity();
QueryDeviceProperties();
}
// <SnippetGetDeviceSelector>
Windows.Networking.Proximity.ProximityDevice proximityDevice;
private async void InitializeProximity()
{
string selectorString = Windows.Networking.Proximity.ProximityDevice.GetDeviceSelector();
var deviceInfoCollection =
await Windows.Devices.Enumeration.DeviceInformation.FindAllAsync(selectorString, null);
if (deviceInfoCollection.Count == 0)
{
StatusTextBlock.Text = "No proximity devices found.";
}
else
{
StatusTextBlock.Text = "Proximity Device id = " + deviceInfoCollection[0].Id;
proximityDevice =
Windows.Networking.Proximity.ProximityDevice.FromId(deviceInfoCollection[0].Id);
}
}
//</SnippetGetDeviceSelector>
// <SnippetDeviceId>
private async void QueryDeviceProperties()
{
// Include the proximity properties key
var propertiesToRetrieve = new List<String> {"{FB3842CD-9E2A-4F83-8FCC-4B0761139AE9} 2"};
var defaultProximityDevice =
Windows.Networking.Proximity.ProximityDevice.GetDefault();
if (defaultProximityDevice != null)
{
var devInfo = await Windows.Devices.Enumeration.DeviceInformation.CreateFromIdAsync(
defaultProximityDevice.DeviceId, propertiesToRetrieve);
if (devInfo.Properties.ContainsKey("{FB3842CD-9E2A-4F83-8FCC-4B0761139AE9} 2"))
{
var proximityCapabilities =
devInfo.Properties["{FB3842CD-9E2A-4F83-8FCC-4B0761139AE9} 2"] as string[];
if (proximityCapabilities.Contains("StandardNfc"))
{
// This proximity device supports NFC
}
}
}
}
// </SnippetDeviceId>
}
}