Uts*_*awn 9 .net c# bluetooth windows-phone-8.1 microsoft-band
我正在开发一个Windows Phone 8.1应用程序,它与Microsoft Band连接以发送一些通知.我需要执行一些后台任务,所以我添加了一个Windows运行时组件项目.
我从后台任务发送通知,即从Runtime组件项目发送通知.但是我收到了一个错误.错误如下:
错误: System.TypeInitializationException:'Microsoft.Band.Store.StoreResources'的类型初始值设定项引发异常.---> System.Exception:在Microsoft.Band.Store.StoreResources..cctor()的Windows.UI.Xaml.Application.get_Current()中发生灾难性故障(来自HRESULT的异常:0x8000FFFF(E_UNEXPECTED))---结束内部异常堆栈跟踪---在Microsoft.Band.Store.Bore.BluetoothTransport的Microsoft.Band.Store.BluetoothTransport.GetTransport(RfcommDeviceService服务,ILoggerProvider loggerProvider,UInt16 maxConnectAttempts)的Microsoft.Band.Store.StoreResources.get_RfComm_FromId_ReturnedNull()处. System_Threading.Tasks.Task.Execute()中的System.Threading.Tasks.Task`1.InnerInvoke()处于c__DisplayClass1.b__0()
正如本问题的答案所述,前台应用程序在后台应用程序尝试连接时不应尝试连接到乐队.
我认为错误是连接到蓝牙的问题,因为我已经调试并找出了错误的位置:
public async void Run(IBackgroundTaskInstance taskInstance)
{
var deferral = taskInstance.GetDeferral();
try
{
Debug.WriteLine("Task Triggered " + DateTime.Now);
taskInstance.Canceled += (s, e) => { };
taskInstance.Progress = 0;
// Get the list of Microsoft Bands paired to the phone.
var pairedBands = await BandClientManager.Instance.GetBandsAsync();
if (pairedBands.Length < 1)
{
Debug.WriteLine(
"This sample app requires a Microsoft Band paired to your device. Also make sure that you have the latest firmware installed on your Band, as provided by the latest Microsoft Health app.");
return;
}
// This is the line I am getting the error
using (var bandClient = await BandClientManager.Instance.ConnectAsync(pairedBands[0]))
{
Debug.WriteLine("Tile creation started");
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我的乐队的蓝牙与微软健康应用程序连接得很好,所以我想我的手机和乐队的蓝牙没有任何问题.
我的前台应用程序的Package.appmanifest如下:

用于后台任务的Package.appmanifest(Windows运行时组件项目):
<?xml version="1.0" encoding="utf-8"?>
<Package xmlns="http://schemas.microsoft.com/appx/2010/manifest">
<Capabilities>
<DeviceCapability Name="bluetooth.rfcomm" xmlns="http://schemas.microsoft.com/appx/2013/manifest">
<Device Id="any">
<!-- Used by the Microsoft Band SDK -->
<Function Type="serviceId:A502CA9A-2BA5-413C-A4E0-13804E47B38F" />
<!-- Used by the Microsoft Band SDK -->
<Function Type="serviceId:C742E1A2-6320-5ABC-9643-D206C677E580" />
</Device>
</DeviceCapability>
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那可能是什么问题呢?你能为这个问题提供解决方案或解决方案吗?
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