c# UWP BluetoothLEDevice.FromIdAsync System.IO.FileNotFoundException 收藏

Question

我正在尝试为我的手机编写一个连接到 BLE 设备的应用。

设备已配对，我编辑了 appxmanifest 以启用蓝牙功能。

但是当我运行应用程序时，下面的代码，

await BluetoothLEDevice.FromIdAsync(deviceInfo.Id);

导致抛出异常:mscorlib.ni.dll 中的“System.IO.FileNotFoundException”

有人知道我做错了什么吗？

谢谢!

var deviceList = await DeviceInformation.FindAllAsync(GattDeviceService.GetDeviceSelectorFromUuid(GattServiceUuids.GenericAccess), null);
int count = deviceList.Count();
if (count > 0)
{
    var deviceInfo = deviceList.Where(x => x.Name == "XC-Tracer").FirstOrDefault();
    if (deviceInfo != null)
    {
        if (deviceInfo.IsEnabled)
        {
            var bleDevice = await BluetoothLEDevice.FromIdAsync(deviceInfo.Id);
            var deviceServices = bleDevice.GattServices;
        }
    }
}

Answer 1

我能够通过使用 GattDeviceService 而不是使用 BluetoothLEDevice 类来实现它:

var deviceList = await DeviceInformation.FindAllAsync(GattDeviceService.GetDeviceSelectorFromUuid(GattServiceUuids.GenericAccess), null);
int count = deviceList.Count();
if (count > 0)
{
    var deviceInfo = deviceList.Where(x => x.Name == "XC-Tracer").FirstOrDefault();
    if (deviceInfo != null)
    {
        if (deviceInfo.IsEnabled)
        {
            var bleDevice = await GattDeviceService.FromIdAsync(deviceInfo.Id);
            var deviceServices = bleDevice.GattServices;
        }
    }
}