Question

我正在尝试将BLE功能添加到经典（WinForms？）C＃桌面应用程序中，并添加了引用（Windows.winmd和System.Runtime.WindowsRuntime），以允许我访问Microsoft最近为以下目的引入的新BLE API。 Windows 10 UWP应用程序。我需要创建一个经典的桌面应用程序，因为我需要使用一个较旧的驱动程序设备包装器（teVirtualMIDI），并且想要创建一个.exe，而不是一个应用程序包。

我正在从以下位置引用上述库...

C：\ Program Files（x86）\ Windows Kits \ 10 \ UnionMetadata \ Facade \ Windows.WinMD

C：\ Program Files（x86）\参考程序集\ 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

在这一点上，我只希望能够像在本博文中所做的那样，在调试输出窗口中查看连接的服务和特征。

https://blogs.msdn.microsoft.com/cdndevs/2017/04/28/uwp-working-with-bluetooth-devices-part-1/

由于BLE API需要执行异步操作，似乎出现了错误，但老实说我很茫然。我到目前为止编写的代码包含在下面。本质上，我在尝试调用“ GetGattServicesAsync（）”方法时收到错误，因为Visual Studio说“ BluetoothLEDevice”类不包含此类定义。但是，该方法包含在联机文档中，我想知道为什么我无法访问它。

希望我能提供足够的信息，对于解决此问题的任何帮助将不胜感激。谢谢大家提供的所有有益建议！

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;
    }
}

Answer 1

The doc说该API属于“ Windows 10 Creators Update（引入的v10.0.15063.0）”。因此，请尝试从“ C：\ Program Files（x86）\ Windows Kits \ 10 \ UnionMetadata \ 10.0.15063.0 \ Windows.winmd”中添加一个

这是我的项目的结果您可以看到我的代码运行良好。

使用UWP API枚举Win32 Desktop应用程序中的BLE设备时遇到问题

1 个答案: