Hello I have a silverlight project for WP8.1 that is a game. I use a backgroundTask to alert the user about when he last played, if he is too slow to comply I would like to make a call to the server from the bagroundTask to resign from the games.
The backgroundTask is made using stackoverflow and this blog, just basic implementations of the backgroundTask.
I then install the NuGet Package Microsoft.Azure.Mobile.Client and everything is fine, I then do a compile, everything succeeds.
The app installs and splashscreen appears, then I get an error in the main project at the initialization of MobileServiceClient in App.xaml.cs
public MobileServiceClient MobileService = new MobileServiceClient(
"https://xxxxx.azurewebsites.net"
);
The exception in the above line states:
An exception of type 'System.IO.FileNotFoundException' occurred in mscorlib.ni.dll but was not handled in user code Additional information: Could not load file or assembly 'System.Runtime.InteropServices, Version=4.0.10.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
The only change was the install of the NuGet package in the backgroundTask project. The stack trace output for the exception above.
at System.ModuleHandle.ResolveType(RuntimeModule module, Int32 typeToken, IntPtr* typeInstArgs, Int32 typeInstCount, IntPtr* methodInstArgs, Int32 methodInstCount, ObjectHandleOnStack type) at System.ModuleHandle.ResolveTypeHandleInternal(RuntimeModule module, Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext) at System.Reflection.RuntimeModule.ResolveType(Int32 metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments) at System.Reflection.CustomAttribute.FilterCustomAttributeRecord(CustomAttributeRecord caRecord, MetadataImport scope, Assembly& lastAptcaOkAssembly, RuntimeModule decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, Object[] attributes, IList derivedAttributes, RuntimeType& attributeType, IRuntimeMethodInfo& ctor, Boolean& ctorHasParameters, Boolean& isVarArg) at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean mustBeInheritable, IList derivedAttributes, Boolean isDecoratedTargetSecurityTransparent) at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean isDecoratedTargetSecurityTransparent) at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType) at System.Reflection.RuntimeAssembly.GetCustomAttributes(Type attributeType, Boolean inherit) at System.Attribute.GetCustomAttributes(Assembly element, Type attributeType, Boolean inherit) at Microsoft.WindowsAzure.MobileServices.PlatformInformationExtensions.GetVersionFromAssemblyFileVersion(IPlatformInformation platformInformation) at Microsoft.WindowsAzure.MobileServices.PlatformInformation.get_Version() at Microsoft.WindowsAzure.MobileServices.MobileServiceHttpClient.GetUserAgentHeader() at Microsoft.WindowsAzure.MobileServices.MobileServiceHttpClient..ctor(IEnumerable`1 handlers, Uri applicationUri, String installationId) at Microsoft.WindowsAzure.MobileServices.MobileServiceClient..ctor(Uri mobileAppUri, HttpMessageHandler[] handlers) at Microsoft.WindowsAzure.MobileServices.MobileServiceClient..ctor(String mobileAppUri, HttpMessageHandler[] handlers) at BC_Menu.App..ctor()
I have not been able to solve this issue.
Extra
I am able to do normal http calls to the web by using the proposed code, replicated here:
BackgroundTaskDeferral _deferral;
public async void Run(IBackgroundTaskInstance taskInstance)
{
_deferral = taskInstance.GetDeferral();
// your async code
_deferral.Complete();
}
Update based on Adrian Halls Answer
The code works, my front application can communicate with the server and everything. The backgroundTask, can extract information from the device everything is fine, everything compiles and runs.
I then add the NuGet package to the backgroundTask and suddenly the above error appears, when I deploy this solution to the client.
I am running VS2015, Win10, and have v2.0.1 installed of Microsoft.Azure.Mobile.Client. I have seen some odd behaviours with silverlight projects on win10 before.
