将EF应用从System.Data.SqlClient迁移至Microsoft.Data.SqlClient遇依赖错误
问题:EF从System.Data.SqlClient迁移至Microsoft.Data.SqlClient时出现依赖找不到错误
我正尝试将使用Entity Framework(EF)的.NET 7复杂Web应用(即将升级至8)从System.Data.SqlClient迁移至Microsoft.Data.SqlClient以支持分布式事务,却遭遇了依赖错误。项目使用Tracker-enabled DBContext库追踪上下文变更,我已修改该库及主应用的依赖为Microsoft.Data.SqlClient,并按官方文档配置新的EF提供程序,但运行应用时出现如下错误:
Autofac.Core.DependencyResolutionException: An exception was thrown while activating MyApplication.Services.Implementations.UserService -> MyApplication.DAL.DataAccessors.MainContext. ---> Autofac.Core.DependencyResolutionException: An exception was thrown while invoking the constructor 'Void .ctor(MyApplication.ClaimsProvider.IClaimsProvider)' on type 'MainContext'. ---> System.IO.FileNotFoundException: Could not load file or assembly 'System.Data.SqlClient, Version=4.6.1.6, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified. File name: 'System.Data.SqlClient, Version=4.6.1.6, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' at System.Data.Entity.Infrastructure.DependencyResolution.DefaultProviderFactoryResolver.GetService(Type type, Object key, Func`3 handleFailedLookup) at System.Data.Entity.Infrastructure.DependencyResolution.DefaultProviderFactoryResolver.GetServices(Type type, Object key) at System.Data.Entity.Infrastructure.DependencyResolution.CachingDependencyResolver.<>c__DisplayClass5_0.<GetServices>b__0(Tuple`2 k) at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory) at System.Data.Entity.Infrastructure.DependencyResolution.CachingDependencyResolver.GetServices(Type type, Object key) at System.Data.Entity.Infrastructure.DependencyResolution.ResolverChain.<>c__DisplayClass6_0.<GetServices>b__0(IDbDependencyResolver r) at System.Linq.Enumerable.SelectManySingleSelectorIterator`2.MoveNext() at System.Linq.Enumerable.ConcatIterator`1.MoveNext() at System.Linq.Enumerable.SelectManySingleSelectorIterator`2.MoveNext() at System.Linq.Enumerable.ConcatIterator`1.MoveNext() at System.Linq.Enumerable.OfTypeIterator[TResult](IEnumerable source)+MoveNext() at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source) at System.Data.Entity.Infrastructure.DependencyResolution.InternalConfiguration.Lock() at System.Data.Entity.Infrastructure.DependencyResolution.DbConfigurationManager.<.ctor>b__10_0() at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode) --- End of stack trace from previous location --- at System.Lazy`1.CreateValue() at System.Data.Entity.Infrastructure.DependencyResolution.DbConfigurationManager.GetConfiguration() at System.Data.Entity.Infrastructure.DependencyResolution.InternalConfiguration.get_Instance() at System.Data.Entity.DbConfiguration.get_DependencyResolver() at System.Data.Entity.DbContext.InitializeLazyInternalContext(IInternalConnection internalConnection, DbCompiledModel model) at System.Data.Entity.DbContext..ctor(String nameOrConnectionString) at TrackerEnabledDbContext.TrackerContext..ctor(String nameOrConnectionString) in F:\Dev\TrackerEnabledDBContext\TrackerEnabledDbContext\TrackerContext.cs:line 74 at MyApplication.DAL.DataAccessors.MainContext..ctor(IClaimsProvider claimsProvider) in F:\Dev\MyApp\src\Data\MyApplication.DAL\DataAccessors\MainContext.cs:line 79 at lambda_method73(Closure, Object[]) at Autofac.Core.Activators.Reflection.BoundConstructor.Instantiate() --- End of inner exception stack trace --- at Autofac.Core.Activators.Reflection.BoundConstructor.Instantiate() at Autofac.Core.Activators.Reflection.ReflectionActivator.ActivateInstance(IComponentContext context, IEnumerable`1 parameters) at Autofac.Core.Activators.Reflection.ReflectionActivator.<ConfigurePipeline>b__11_0(ResolveRequestContext ctxt, Action`1 next) at Autofac.Core.Resolving.Middleware.DisposalTrackingMiddleware.Execute(ResolveRequestContext context, Action`1 next) at Autofac.Core.Resolving.Middleware.ActivatorErrorHandlingMiddleware.Execute(ResolveRequestContext context, Action`1 next) --- End of inner exception stack trace --- at Autofac.Core.Resolving.Middleware.ActivatorErrorHandlingMiddleware.Execute(ResolveRequestContext context, Action`1 next) at Autofac.Core.Resolving.Middleware.SharingMiddleware.Execute(ResolveRequestContext context, Action`1 next) at Autofac.Core.Resolving.Middleware.CircularDependencyDetectorMiddleware.Execute(ResolveRequestContext context, Action`1 next) at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, ResolveRequest request) at Autofac.Core.Resolving.ResolveOperation.ExecuteOperation(ResolveRequest request) at Autofac.ResolutionExtensions.TryResolveService(IComponentContext context, Service service, IEnumerable`1 parameters, Object& instance) at Autofac.ResolutionExtensions.ResolveOptionalService(IComponentContext context, Service service, IEnumerable`1 parameters) at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetService(IServiceProvider sp, Type type, Type requiredBy, Boolean isDefaultParameterRequired) at lambda_method627(Closure, IServiceProvider, Object[]) at Microsoft.AspNetCore.Mvc.Controllers.ControllerFactoryProvider.<>c__DisplayClass6_0.<CreateControllerFactory>g__CreateController|0(ControllerContext controllerContext) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync() --- End of stack trace from previous location --- at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync() --- End of stack trace from previous location --- at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope) at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger) at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Watch.BrowserRefresh.BrowserRefreshMiddleware.InvokeAsync(HttpContext context) at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequests[TContext](IHttpApplication`1 application)
我已在app.config中替换了提供程序配置:
<configSections> <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 --> <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/> </configSections> <entityFramework> <defaultConnectionFactory type="System.Data.Entity.Infrastructure.MicrosoftLocalDbConnectionFactory, EntityFramework"> <parameters> <parameter value="mssqllocaldb"/> </parameters> </defaultConnectionFactory> <providers> <provider invariantName="Microsoft.Data.SqlClient" type="System.Data.Entity.SqlServer.MicrosoftSqlProviderServices, Microsoft.EntityFramework.SqlServer" /> </providers> </entityFramework>
同时已在应用和库中安装了Microsoft.Data.SqlClient与Microsoft.EntityFramework.SqlServer NuGet包,本以为完全移除System.Data.SqlClient并替换提供程序后即可正常运行,但程序仍在寻找该程序集。
编辑: 发现某项目中遗漏了System.Data.SqlClient包,移除后问题解决。
内容的提问来源于stack exchange,提问作者ScruffyMagic
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