我正在尝试在我的 asp.net c# 应用程序中使用 Mongodb。我正在使用 Autofac 来解决依赖关系。当 autofac 尝试解析对象构造函数时出现以下错误。
json中的autofac模块详细信息：
"properties": {
"ConnectionString": "mongodb://localhost:27017",
"DatabaseName": "jambov32"
}
public BlogQueries(string connectionString, string databaseName)
{
try
{
MongoClient mongoClient = new MongoClient(connectionString);
this.database = mongoClient.GetDatabase(databaseName);
}
catch(Exception ex)
{
Console.WriteLine("Exception blogquer=="+ex);
}
}
错误：
fail: Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware[0]
An unhandled exception has occurred while executing the request
Autofac.Core.DependencyResolutionException: An error occurred during the activat
ion of a particular registration. See the inner exception for details. Registrat
ion: Activator = BlogQueries (ReflectionActivator), Services = [Jambo.Producer.A
pplication.Queries.IBlogQueries], Lifetime = Autofac.Core.Lifetime.RootScopeLife
time, Sharing = Shared, Ownership = OwnedByLifetimeScope ---> An exception was t
hrown while invoking the constructor 'Void .ctor(System.String, System.String)'
on type 'BlogQueries'. ---> Could not load file or assembly 'MongoDB.Driver, Ver
sion=2.7.0.0, Culture=neutral, PublicKeyToken=null'. The system cannot find the
file specified. (See inner exception for details.) (See inner exception for deta
ils.) ---> Autofac.Core.DependencyResolutionException: An exception was thrown w
hile invoking the constructor 'Void .ctor(System.String, System.String)' on type
'BlogQueries'. ---> Could not load file or assembly 'MongoDB.Driver, Version=2.
7.0.0, Culture=neutral, PublicKeyToken=null'. The system cannot find the file sp
ecified. (See inner exception for details.) ---> System.IO.FileNotFoundException
: Could not load file or assembly 'MongoDB.Driver, Version=2.7.0.0, Culture=neut
ral, PublicKeyToken=null'. The system cannot find the file specified.
at Jambo.Producer.Infrastructure.Queries.BlogQueries..ctor(String connectionS
tring, String databaseName)
at lambda_method(Closure , Object[] )
at Autofac.Core.Activators.Reflection.ConstructorParameterBinding.Instantiate
()
--- End of inner exception stack trace ---
at Autofac.Core.Activators.Reflection.ConstructorParameterBinding.Instantiate
()
at Autofac.Core.Activators.Reflection.ReflectionActivator.ActivateInstance(IC
omponentContext context, IEnumerable`1 parameters)
at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable`1 parameters)
--- End of inner exception stack trace ---
at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable`1 parameters)
at Autofac.Core.Lifetime.LifetimeScope.GetOrCreateAndShare(Guid id, Func`1 cr
eator)
at Autofac.Core.Resolving.InstanceLookup.Execute()
at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifeti
meScope currentOperationScope, IComponentRegistration registration, IEnumerable`
1 parameters)
at Autofac.Core.Resolving.ResolveOperation.Execute(IComponentRegistration reg
istration, IEnumerable`1 parameters)
at Autofac.ResolutionExtensions.TryResolveService(IComponentContext context,
Service service, IEnumerable`1 parameters, Object& instance)
at Autofac.ResolutionExtensions.ResolveOptionalService(IComponentContext cont
ext, Service service, IEnumerable`1 parameters)
at Microsoft.Extensions.Internal.ActivatorUtilities.GetService(IServiceProvid
er sp, Type type, Type requiredBy, Boolean isDefaultParameterRequired)
at lambda_method(Closure , IServiceProvider , Object[] )
at Microsoft.AspNetCore.Mvc.Controllers.ControllerActivatorProvider.<>c__Disp
layClass4_0.<CreateActivator>b__0(ControllerContext controllerContext)
at Microsoft.AspNetCore.Mvc.Controllers.ControllerFactoryProvider.<>c__Displa
yClass5_0.<CreateControllerFactory>g__CreateController0(ControllerContext contro
llerContext)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Next(State& next
, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeInnerFilt
erAsync>d__14.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNot
ification(Task task)
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeNextExceptionFilt
erAsync>d__23.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ExceptionContext
context)
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next, Scope&
scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeNextResourceFilte
r>d__22.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResourceExecuted
Context context)
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next, Scope&
scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeFilterPipelineAsy
nc>d__17.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNot
ification(Task task)
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeAsync>d__15.MoveN
ext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNot
ification(Task task)
at Microsoft.AspNetCore.Builder.RouterMiddleware.<Invoke>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNot
ification(Task task)
at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.<Invoke>d__6.
MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNot
ification(Task task)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.<Invoke>
d__7.MoveNext()
谁能请我在这里做错了什么？
谢谢