将ADO.NET实体数据模型添加到Azure函数项目中会导致异常

时间：2018-10-08 13:56:57

标签： asp.net entity-framework azure azure-functions

我正在将webjob（控制台应用程序）转换为azure函数： 因此，azure函数具有.Net Framework 4.6.1的目标框架，当我添加新项（ADO.Net实体数据模型）并配置我得到的连接字符串时，我从NuGet Packet Manager安装了实体框架6.0.0。以下错误：“调用的目标引发了异常”和一条日志：

=====================
10/8/2018 4:18:03 PM
Recoverable
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. --->     Microsoft.VisualStudio.ProjectSystem.ProjectException: The item type 'EntityDeploy' is not supported by this project item provider.
at Microsoft.VisualStudio.ProjectSystem.ProjectErrorUtilities.ThrowProjectExceptionHelper(Exception innerException, String unformattedMessage, Object[] args)
at Microsoft.VisualStudio.ProjectSystem.ProjectErrorUtilities.ThrowProjectException(String message, Object arg0)
at Microsoft.VisualStudio.ProjectSystem.CpsProjectItem`1.<SetItemTypeAsync>d__25.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.PropertyPages.PageItemTypeProperty.<SetValueAsStringAsync>d__13.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.PropertyPages.DynamicTypeBrowseObject.<>c__DisplayClass112_0.<<VSLangProj80-FileProperties2-set_ItemType>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.ProjectNode.<>c__DisplayClass569_0.<<Mutate>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.Threading.JoinableTask.CompleteOnCurrentThread()
at Microsoft.VisualStudio.ProjectSystem.ProjectMultiThreadedService.ExecuteSynchronously(Func`1 asyncAction)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.ProjectNode.Mutate(Func`1 asyncAction, Boolean includesFileSystemChange, String telemetryActivity)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.PropertyPages.DynamicTypeBrowseObject.VSLangProj80.FileProperties2.set_ItemType(String value)
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture)
at System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, Object[] index)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAPropertyInfo.set_Value(Object value)
at Microsoft.Data.Entity.Design.VisualStudio.ModelWizard.ModelObjectItemWizard.RunFinished()
at Microsoft.VisualStudio.TemplateWizard.Wizard.Execute(Object application, Int32 hwndOwner, Object[]& ContextParams, Object[]& CustomParams, wizardResult& retval)
at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
at Microsoft.VisualStudio.ErrorHandler.ThrowOnFailure(Int32 hr, Int32[] expectedHRFailure)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.ProjectNode.RunWizard(SimpleHierarchyNode parentNode, String itemName, String wizardToRun, IntPtr dlgOwner)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.ProjectNode.<AddItemWithSpecificAsync>d__613.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.ProjectNode.<>c__DisplayClass476_0.<<AddItem>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.Threading.JoinableTask.CompleteOnCurrentThread()
at Microsoft.VisualStudio.Threading.JoinableTask`1.CompleteOnCurrentThread()
at Microsoft.VisualStudio.ProjectSystem.ProjectMultiThreadedService.ExecuteSynchronously[T](Func`1 asyncAction)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.ProjectNode.<>c__DisplayClass568_0.<HrInvoke>b__0()
at Microsoft.VisualStudio.ProjectSystem.VS.HResult.Invoke(Func`1 action, IServiceProvider vsShellServiceProvider, IProjectFaultHandlerService projectFaultHandlerService, UnconfiguredProject project)
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
t Microsoft.VisualStudio.ProjectSystem.CommonProjectSystemTools.Rethrow(Exception ex)
at Microsoft.VisualStudio.ProjectSystem.ProjectErrorReporting.<>c__DisplayClass6_0.<SubmitErrorReport>b__0()
at Microsoft.VisualStudio.ProjectSystem.ExceptionFilter.<>c__DisplayClass2_0.<Guard>g__action|0()
at GuardMethodClass.GuardMethod(Func`1 , Func`2 , Func`2 )
===================

我尝试恢复到EntityFramework 5，但得到的结果相同。

我还尝试将edm添加到单独的文件夹中。

仅生成.edmx，.designer.cs和.edmx.diagram文件；缺少的文件：.context.tt，.context.cs和.tt。

有人知道什么可能导致此问题吗？

单独注释

我试图查看问题是否出自使用4.6.1框架，并使用4.6.1框架创建了控制台应用程序，并且能够正常添加数据库。

其他信息！

问题可能与实体框架6有关，因为在尝试构建时，我在Model.Designer.cs名称空间的System.Data.Entity中遇到错误。手动将所有System.Data.Entity更改为System.Data.Entity.Core可以消除错误，但是每当我从Model.edmx中的数据库更新模型时，代码都会重新生成...

1 个答案:

答案 0 :(得分：1)

感谢this的天才，我发现Visual Studio无法在天蓝色函数项目中添加数据库时正确生成所有文件。这就是为什么我必须将.NET Framework类库添加为第二个项目。在其中添加ADO .NET实体数据模型，然后只需在local.settings.json中添加其连接字符串即可。

"ConnectionStrings": {
  "Entities": {
    "ConnectionString": "[…]",
    "ProviderName": "System.Data.EntityCLient"
  }
}

提示您必须在连接字符串内用&quot;替换'。

也不要忘记将第二个类库项目添加为对第一个类的依赖！

希望有帮助！

注意

这是针对azure函数v1，如果您正在使用azure函数v2，则必须使用实体框架core：/

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