c# - TypeInitializationException：“System.Data.Entity.Internal.AppConfig”的类型初始化程序引发异常
问题描述
我目前正在尝试为名为“Application”的应用程序创建一个 ASP.NET Core API。它包含客户和产品。当我请求通过我的 CustomerController 获取所有客户时，我收到以下错误：
System.TypeInitializationException
HResult=0x80131534
Message=The type initializer for 'System.Data.Entity.Internal.AppConfig' threw an exception.
Source=EntityFramework
StackTrace:
at System.Data.Entity.Internal.LazyInternalConnection..ctor(DbContext context,
String nameOrConnectionString)
at System.Data.Entity.DbContext..ctor(String nameOrConnectionString)
at Application.TestAPI.Logic.Database.ApplicationDatabaseContext..ctor(String connString) in C:\Users\Chris\Source\repos\Application.TestAPI\Application.TestAPI.Logic\Database\ApplicationDatabaseContext.cs:line 9
at Application.TestAPI.Logic.Init.<>c__DisplayClass0_0.<AddLogic>b__0(IServiceProvider _) in C:\Users\Chris\Source\repos\Application.TestAPI\Application.TestAPI.Logic\Init.cs:line 19
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory(FactoryCallSite factoryCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetService(IServiceProvider sp, Type type, Type requiredBy, Boolean isDefaultParameterRequired)
at Microsoft.AspNetCore.Mvc.Controllers.ControllerActivatorProvider.<>c__DisplayClass4_0.<CreateActivator>b__0(ControllerContext controllerContext)
at Microsoft.AspNetCore.Mvc.Controllers.ControllerFactoryProvider.<>c__DisplayClass5_0.<CreateControllerFactory>g__CreateController|0(ControllerContext controllerContext)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeInnerFilterAsync>d__13.MoveNext()
Inner Exception 1:
FileNotFoundException: Could not load file or assembly
'System.Configuration.ConfigurationManager, Version=0.0.0.0, Culture=neutral,
PublicKeyToken=cc7b13ffcd2ddd51'. Det går inte att hitta filen.
它崩溃的代码/类是：
using Application.TestAPI.Logic.Models;
using System.Data.Entity;
using System.Diagnostics;
namespace Application.TestAPI.Logic.Database
{
public class ApplicationDatabaseContext : DbContext
{
public ApplicationDatabaseContext(string connString) : base(connString)
{
//Database.Log = s => Debug.WriteLine(s);
}
public DbSet<ApplicationCustomer> Customers { get; set; }
public DbSet<ApplicationContract> Contracts { get; set; }
}
}
连接字符串没有放在类库的 App.config 中，而是放在 API 项目中的 appsettings.json 中。
参数 connString 是一个我知道有效的有效连接字符串，它是从以下代码行传递的：
services.AddScoped(_ => new ApplicationDatabaseContext(applicationConfiguration.GetValue<string>("ConnectionString")));
我的 *.csproj 文件如下所示：
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
<ProjectGuid>{6347E02C-B759-404B-8E2F-20B67E2524B2}</ProjectGuid>
<OutputType>Library</OutputType>
<AppDesignerFolder>Properties</AppDesignerFolder>
<RootNamespace>Application.TestAPI.Logic</RootNamespace>
<AssemblyName>Application.TestAPI.Logic</AssemblyName>
<TargetFrameworkVersion>v4.6.2</TargetFrameworkVersion>
<FileAlignment>512</FileAlignment>
<Deterministic>true</Deterministic>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<DebugSymbols>true</DebugSymbols>
<DebugType>full</DebugType>
<Optimize>false</Optimize>
<OutputPath>bin\Debug\</OutputPath>
<DefineConstants>DEBUG;TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
<DebugType>pdbonly</DebugType>
<Optimize>true</Optimize>
<OutputPath>bin\Release\</OutputPath>
<DefineConstants>TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<ItemGroup>
<Reference Include="EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, processorArchitecture=MSIL">
<HintPath>..\packages\EntityFramework.6.2.0\lib\net45\EntityFramework.dll</HintPath>
</Reference>
<Reference Include="EntityFramework.SqlServer, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, processorArchitecture=MSIL">
<HintPath>..\packages\EntityFramework.6.2.0\lib\net45\EntityFramework.SqlServer.dll</HintPath>
</Reference>
<Reference Include="Microsoft.EntityFrameworkCore">
<HintPath>..\..\..\..\..\..\Program Files\dotnet\sdk\NuGetFallbackFolder\microsoft.entityframeworkcore\2.1.1\lib\netstandard2.0\Microsoft.EntityFrameworkCore.dll</HintPath>
</Reference>
<Reference Include="Microsoft.Extensions.Configuration, Version=2.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL">
<HintPath>..\packages\Microsoft.Extensions.Configuration.2.1.1\lib\netstandard2.0\Microsoft.Extensions.Configuration.dll</HintPath>
</Reference>
<Reference Include="Microsoft.Extensions.Configuration.Abstractions, Version=2.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL">
<HintPath>..\packages\Microsoft.Extensions.Configuration.Abstractions.2.1.1\lib\netstandard2.0\Microsoft.Extensions.Configuration.Abstractions.dll</HintPath>
</Reference>
<Reference Include="Microsoft.Extensions.Configuration.Binder, Version=2.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL">
<HintPath>..\packages\Microsoft.Extensions.Configuration.Binder.2.1.1\lib\netstandard2.0\Microsoft.Extensions.Configuration.Binder.dll</HintPath>
</Reference>
<Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions, Version=2.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL">
<HintPath>..\packages\Microsoft.Extensions.DependencyInjection.Abstractions.2.1.1\lib\netstandard2.0\Microsoft.Extensions.DependencyInjection.Abstractions.dll</HintPath>
</Reference>
<Reference Include="Microsoft.Extensions.Options, Version=2.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL">
<HintPath>..\packages\Microsoft.Extensions.Options.2.1.1\lib\netstandard2.0\Microsoft.Extensions.Options.dll</HintPath>
</Reference>
<Reference Include="Microsoft.Extensions.Options.ConfigurationExtensions, Version=2.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL">
<HintPath>..\packages\Microsoft.Extensions.Options.ConfigurationExtensions.2.1.1\lib\netstandard2.0\Microsoft.Extensions.Options.ConfigurationExtensions.dll</HintPath>
</Reference>
<Reference Include="Microsoft.Extensions.Primitives, Version=2.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL">
<HintPath>..\packages\Microsoft.Extensions.Primitives.2.1.1\lib\netstandard2.0\Microsoft.Extensions.Primitives.dll</HintPath>
</Reference>
<Reference Include="Application.Core, Version=6.6.2.0, Culture=neutral, processorArchitecture=MSIL">
<HintPath>..\packages\Application.Core.6.6.2\lib\net46\Application.Core.dll</HintPath>
</Reference>
<Reference Include="Application.Core.Dto, Version=1.0.0.0, Culture=neutral, processorArchitecture=MSIL">
<HintPath>..\packages\Application.Core.6.6.2\lib\net46\Application.Core.Dto.dll</HintPath>
</Reference>
<Reference Include="Newtonsoft.Json, Version=11.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
<HintPath>..\packages\Newtonsoft.Json.11.0.2\lib\net45\Newtonsoft.Json.dll</HintPath>
</Reference>
<Reference Include="StructureMap">
<HintPath>Lib\StructureMap.dll</HintPath>
</Reference>
<Reference Include="StructureMap.Net4">
<HintPath>Lib\StructureMap.Net4.dll</HintPath>
</Reference>
<Reference Include="StructureMap.Web">
<HintPath>Lib\StructureMap.Web.dll</HintPath>
</Reference>
<Reference Include="System" />
<Reference Include="System.Buffers, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
<HintPath>..\packages\System.Buffers.4.5.0\lib\netstandard2.0\System.Buffers.dll</HintPath>
</Reference>
<Reference Include="System.ComponentModel.DataAnnotations" />
<Reference Include="System.Configuration" />
<Reference Include="System.Core" />
<Reference Include="System.Data.OracleClient" />
<Reference Include="System.Drawing" />
<Reference Include="System.IO.Pipelines, Version=4.0.0.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
<HintPath>..\packages\System.IO.Pipelines.4.5.2\lib\netstandard2.0\System.IO.Pipelines.dll</HintPath>
</Reference>
<Reference Include="System.Memory, Version=4.0.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
<HintPath>..\packages\System.Memory.4.5.1\lib\netstandard2.0\System.Memory.dll</HintPath>
</Reference>
<Reference Include="System.Net" />
<Reference Include="System.Numerics" />
<Reference Include="System.Numerics.Vectors, Version=4.1.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
<HintPath>..\packages\System.Numerics.Vectors.4.5.0\lib\net46\System.Numerics.Vectors.dll</HintPath>
</Reference>
<Reference Include="System.Runtime.CompilerServices.Unsafe, Version=4.0.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
<HintPath>..\packages\System.Runtime.CompilerServices.Unsafe.4.5.1\lib\netstandard2.0\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
</Reference>
<Reference Include="System.Security.AccessControl, Version=4.1.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
<HintPath>..\packages\System.Security.AccessControl.4.5.0\lib\net461\System.Security.AccessControl.dll</HintPath>
</Reference>
<Reference Include="System.Security.Permissions, Version=4.0.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
<HintPath>..\packages\System.Security.Permissions.4.5.0\lib\net461\System.Security.Permissions.dll</HintPath>
</Reference>
<Reference Include="System.Security.Principal.Windows, Version=4.1.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
<HintPath>..\packages\System.Security.Principal.Windows.4.5.0\lib\net461\System.Security.Principal.Windows.dll</HintPath>
</Reference>
<Reference Include="System.ServiceProcess" />
<Reference Include="System.Threading.Tasks.Extensions, Version=4.2.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
<HintPath>..\packages\System.Threading.Tasks.Extensions.4.5.1\lib\netstandard2.0\System.Threading.Tasks.Extensions.dll</HintPath>
</Reference>
<Reference Include="System.Transactions" />
<Reference Include="System.Xml.Linq" />
<Reference Include="System.Data.DataSetExtensions" />
<Reference Include="Microsoft.CSharp" />
<Reference Include="System.Data" />
<Reference Include="System.Net.Http" />
<Reference Include="System.Xml" />
</ItemGroup>
<ItemGroup>
<Compile Include="Configuration\ApplicationOptions.cs" />
<Compile Include="Connector\ApplicationConnector.cs" />
<Compile Include="Database\CustomerConfiguration.cs" />
<Compile Include="Database\ApplicationDatabaseContext.cs" />
<Compile Include="Init.cs" />
<Compile Include="Models\Customer.cs" />
<Compile Include="Models\CustomerDto.cs" />
<Compile Include="Models\Filter.cs" />
<Compile Include="Models\ApplicationContract.cs" />
<Compile Include="Models\ApplicationCustomer.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
<Compile Include="Services\CustomerService.cs" />
<Compile Include="Services\FilterService.cs" />
<Compile Include="Services\ICustomerService.cs" />
<Compile Include="Services\AppliationCustomerService.cs" />
<Compile Include="Translators\CustomerTranslator.cs" />
<Compile Include="Translators\ApplicationCustomerTranslator.cs" />
</ItemGroup>
<ItemGroup>
<None Include="app.config">
<SubType>Designer</SubType>
</None>
<None Include="packages.config" />
</ItemGroup>
<ItemGroup />
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
</Project>
我尝试重新安排我的 App.config，重新安装 EntityFramework，硬编码我的连接字符串并System.Configuration.ConfigurationManager通过 NuGet 安装。到目前为止没有任何效果。
关于可能导致这种情况的任何建议/解释？
问候，
克里斯
解决方案
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