4
嘗試註冊我的DbContext時，Simple Inject引發以下異常。無法使用簡單注射器爲每個請求創建DbContext
提供的連接字符串無效，因爲它包含的映射或元數據信息不足。 參數名稱：connectionString
我是DI新手，可能會丟失相當明顯的東西。連接字符串看起來很好。它與通常用於創建DbContext的是一樣的。我試圖解決here
public static class SimpleInjectorInitializer
{
/// <summary>Initialize the container and register
// it as MVC3 Dependency Resolver.</summary>
public static void Initialize()
{
var container = new Container();
InitializeContainer(container);
container.RegisterMvcControllers(
Assembly.GetExecutingAssembly());
container.RegisterMvcAttributeFilterProvider();
container.Verify();
DependencyResolver.SetResolver(
new SimpleInjectorDependencyResolver(container));
}
private static void InitializeContainer(
Container container)
{
}
}
更新：我還沒有解決我的問題，但它是非常相似，這一問題Ninject
堆棧跟蹤：
System.InvalidOperationException was unhandled by user code
Message=The configuration is invalid. Creating the instance for type _AccountController failed. Error occurred while trying to get an instance of type _AccountController. The type initializer for 'Web.Controllers._AccountController' threw an exception.
Source=SimpleInjector
StackTrace:
at SimpleInjector.Helpers.Verify(IInstanceProducer instanceProducer, Type serviceType)
at SimpleInjector.Container.ValidateRegistrations()
at SimpleInjector.Container.Verify()
at Web.App_Start.SimpleInjectorInitializer.Initialize() in C:\workspace\BrowsarServer\QARSite\Web\App_Start\SimpleInjectorInitializer.cs:line 24
InnerException: SimpleInjector.ActivationException
Message=Error occurred while trying to get an instance of type _AccountController. The type initializer for 'Web.Controllers._AccountController' threw an exception.
Source=SimpleInjector
StackTrace:
at SimpleInjector.InstanceProducers.InstanceProducer.ThrowErrorWhileTryingToGetInstanceOfType(Exception innerException)
at SimpleInjector.InstanceProducers.InstanceProducer.GetInstance()
at SimpleInjector.Helpers.Verify(IInstanceProducer instanceProducer, Type serviceType)
InnerException: System.TypeInitializationException
Message=The type initializer for 'Web.Controllers._AccountController' threw an exception.
Source=Web
TypeName=Web.Controllers._AccountController
StackTrace:
at Web.Controllers._AccountController..ctor()
at lambda_method(Closure)
at SimpleInjector.InstanceProducers.InstanceProducer.GetInstance()
InnerException: System.ArgumentException
Message=The supplied connection string is not valid, because it contains insufficient mapping or metadata information.
Parameter name: connectionString
Source=System.Data.Entity
ParamName=connectionString
StackTrace:
at System.Data.Objects.ObjectContext..ctor(EntityConnection connection, Boolean isConnectionConstructor)
at System.Data.Objects.ObjectContext..ctor(String connectionString, String defaultContainerName)
at Web.Models.BrowsarEntities..ctor() in C:\workspace\BrowsarServer\QARSite\Web\Models\Browsar.Designer.cs:line 90
at Web.Controllers._AccountController..cctor() in C:\workspace\BrowsarServer\QARSite\Web\Controllers\_AccountController.cs:line 15
InnerException: System.InvalidOperationException
Message=Unable to determine application context. The ASP.NET application path could not be resolved.
Source=System.Data.Entity
StackTrace:
at System.Data.Metadata.Edm.AspProxy.GetBuildManagerReferencedAssemblies()
at System.Data.Metadata.Edm.DefaultAssemblyResolver.GetAllDiscoverableAssemblies()
at System.Data.Metadata.Edm.DefaultAssemblyResolver.GetWildcardAssemblies()
at System.Data.Metadata.Edm.MetadataArtifactLoaderCompositeResource.LoadResources(String assemblyName, String resourceName, ICollection`1 uriRegistry, MetadataArtifactAssemblyResolver resolver)
at System.Data.Metadata.Edm.MetadataArtifactLoaderCompositeResource.CreateResourceLoader(String path, ExtensionCheck extensionCheck, String validExtension, ICollection`1 uriRegistry, MetadataArtifactAssemblyResolver resolver)
at System.Data.Metadata.Edm.MetadataArtifactLoader.Create(String path, ExtensionCheck extensionCheck, String validExtension, ICollection`1 uriRegistry, MetadataArtifactAssemblyResolver resolver)
at System.Data.Metadata.Edm.MetadataCache.SplitPaths(String paths)
at System.Data.Common.Utils.Memoizer`2.<>c__DisplayClass2.<Evaluate>b__0()
at System.Data.Common.Utils.Memoizer`2.Result.GetValue()
at System.Data.Common.Utils.Memoizer`2.Evaluate(TArg arg)
at System.Data.EntityClient.EntityConnection.GetMetadataWorkspace(Boolean initializeAllCollections)
at System.Data.Objects.ObjectContext.RetrieveMetadataWorkspaceFromConnection()
at System.Data.Objects.ObjectContext..ctor(EntityConnection connection, Boolean isConnectionConstructor)
InnerException: System.Reflection.TargetInvocationException
Message=Exception has been thrown by the target of an invocation.
Source=mscorlib
StackTrace:
at System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
at System.RuntimeMethodHandle.InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.Data.Metadata.Edm.AspProxy.GetBuildManagerReferencedAssemblies()
InnerException: System.InvalidOperationException
Message=This method cannot be called during the application's pre-start initialization stage.
Source=System.Web
StackTrace:
at System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled()
at System.Web.Compilation.BuildManager.GetReferencedAssemblies()
InnerException:
簡單的噴油器不會拋出像這樣的異常。看看你的棧跟蹤出現這個異常（提示：看看內部異常）。可能是你的'新的DbContext'失敗了。 – Steven
注意：如果您想要一個很好的答案，請始終在您的問題中提供異常和堆棧跟蹤。 – Steven
添加了堆棧跟蹤。我還發現了Ninject的一個非常類似的未解決的問題。 –