azure - WP Silverlight 后台任务与 Azure 的通信

Question

您好，我有一个适用于 WP8.1 的 silverlight 项目，它是一款游戏。我使用后台任务来提醒用户他上次玩游戏的时间，如果他太慢而无法遵守，我想从 bagroundTask 调用服务器以退出游戏。

backgroundTask是使用stackoverflow制作的和 this blog ，只是backgroundTask的基本实现。

然后我安装 NuGet 包 Microsoft.Azure.Mobile.Client一切都很好，然后我进行编译，一切都成功了。

应用程序安装并出现启动画面，然后我在初始化 MobileServiceClient 时在主项目中收到错误在App.xaml.cs

 public MobileServiceClient MobileService = new MobileServiceClient(
        "https://xxxxx.azurewebsites.net"
    );

以上行中的异常状态:

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.

唯一的变化是在backgroundTask 项目中安装NuGet 包。上述异常的堆栈跟踪输出。

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()

我还没能解决这个问题。

额外

我可以使用proposed code对网络进行正常的http调用，复制在这里:

BackgroundTaskDeferral _deferral;

public async void Run(IBackgroundTaskInstance taskInstance)
{
    _deferral = taskInstance.GetDeferral();
    // your async code
    _deferral.Complete();
}

根据 Adrian Halls 的回答进行更新

代码有效，我的前端应用程序可以与服务器和所有内容进行通信。后台任务，可以从设备中提取信息，一切都很好，一切都编译并运行。

然后，我将 NuGet 包添加到 backgroundTask 中，当我将此解决方案部署到客户端时，突然出现上述错误。

我运行的是 VS2015、Win10，并安装了 v2.0.1 Microsoft.Azure.Mobile.Client。我在win10 before上看到了silverlight项目的一些奇怪行为.

Answer 1

该错误表明您的 .NET 设置存在问题 - 错误位于 mscorlib(.NET 的基本库)中。尝试添加对您需要的特定库的引用。另外，请确保您已安装 v2.0.1(或更高版本)或 Microsoft.Azure.Mobile.Client 库。