4
尝试注册我的DbContext时，Simple Inject引发以下异常。无法使用简单注射器为每个请求创建DbContext
提供的连接字符串无效，因为它包含的映射或元数据信息不足。 参数名称：connectionString
我是DI新手，可能会丢失相当明显的东西。连接字符串看起来很好。它与通常用于创建DbContext的是一样的。我试图解决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：我还没有解决我的问题，但它是非常相似，这一问题Ninject
堆栈跟踪：
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:
简单的喷油器不会抛出像这样的异常。看看你的栈跟踪出现这个异常（提示：看看内部异常）。可能是你的'新的DbContext'失败了。 – Steven
注意：如果您想要一个很好的答案，请始终在您的问题中提供异常和堆栈跟踪。 – Steven
添加了堆栈跟踪。我还发现了Ninject的一个非常类似的未解决的问题。 –