これが私のコードです。初めて実行したときはすべて正常に動作します。つまり、HttpNotificationChannel.Find() は null を返します。
しかし、2 回目に実行すると、Find() は適切なものを返しますが、Open() 呼び出しに到達すると、例外がスローされます。Open() は引数を取らないので、これは本当に奇妙です。
私は何を間違っていますか?
public string ChannelName = "MyAppChannel";
...
NotificationChannel = HttpNotificationChannel.Find(ChannelName);
if (NotificationChannel == null)
{
NotificationChannel = new HttpNotificationChannel(ChannelName);
}
NotificationChannel.ChannelUriUpdated += new EventHandler(Channel_ChannelUriUpdated);
NotificationChannel.HttpNotificationReceived += new EventHandler(NotificationChannel_HttpNotificationReceived);
NotificationChannel.ErrorOccurred += new EventHandler(Channel_ErrorOccurred);
NotificationChannel.Open(); // <-- Kaboom here, the 2nd time
全文とスタックは次のとおりです。
System.ArgumentException: E_INVALIDARG
at Microsoft.Phone.Notification.SafeNativeMethods.ThrowExceptionFromHResult(Int32 hr, Exception defaultException, NotificationType type)
at Microsoft.Phone.Notification.HttpNotificationChannel.Open()
at LiveShare.NotificationManager.Initialize()
at LiveShare.App..ctor()
at System.Reflection.RuntimeConstructorInfo.InternalInvoke(RuntimeConstructorInfo rtci, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture, Boolean isBinderDefault, Assembly caller, Boolean verifyAccess, StackCrawlMark& stackMark)
at System.Reflection.RuntimeConstructorInfo.InternalInvoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, StackCrawlMark& stackMark)
at System.Reflection.ConstructorInfo.Invoke(Object[] parameters)
at MS.Internal.TypeProxy.<>c__DisplayClass30.b__2a()
at MS.Internal.TypeProxy.CreateInstance(UInt32 customTypeId)
at MS.Internal.FrameworkCallbacks.CreateKnownObject(IntPtr nativeRootPeer, UInt32 customTypeId, String initializationString, IntPtr& nativePeer, UInt32 isCreatedByParser)
at MS.Internal.FrameworkCallbacks.CreateUnknownObject(String assemblyName, String typeName, IntPtr nativeRootPeer, String initializationString, UInt32& customTypeId, UInt32& coreTypeId, UInt32& typeFlags, IntPtr& nativePeer)