我们有一个桌面Windows应用程序使用一些UWP蓝牙LE-UWP功能。我们启动观察程序:
string BTLEDeviceWatcherAQSString = "(System.Devices.Aep.ProtocolId:=\"{bb7bb05e-5972-42b5-94fc-76eaa7084d49}\")";
string[] props = { "System.Devices.Aep.DeviceAddress", "System.Devices.Aep.IsConnected", "System.Devices.Aep.Bluetooth.Le.IsConnectable"};
watcher = DeviceInformation.CreateWatcher(BTLEDeviceWatcherAQSString, props, DeviceInformationKind.AssociationEndpoint);
它在大多数机器上运行正常,只是很少有匿名的错误日志:
System.Exception: Element not found. Property key syntax error. A property key must either be specified as a canonical property name (preferred) or be of the form {fmtid} pid.
at Windows.Devices.Enumeration.DeviceInformation.CreateWatcher(String aqsFilter, IEnumerable`1 additionalProperties, DeviceInformationKind kind)
什么可能导致这个错误?一些硬件配置或Windows 10设置?