如何解决运行迁移时在.Net核心Web API中获取FileNotFound异常
在尝试将数据库迁移添加到我的.net核心Web api项目时遇到了此异常。
错误是无法找到数据库文件。我已经在sqlExpress中创建了数据库...但是由于某些奇怪的原因，我在运行命令时一直收到此错误
添加迁移数据库创建
Add-Migration DatabaseCreation
开始构建...构建成功。 System.IO.FileNotFoundException： 无法加载文件或程序集'LafargeDb，文化=中性， PublicKeyToken = null”。该系统找不到指定的文件。文件 名称：“ LafargeDb，文化=中性，PublicKeyToken =空”，位于 System.Reflection.RuntimeAssembly.nLoad（AssemblyName fileName，字符串 codeBase，RuntimeAssembly assemblyContext，StackCrawlMark和stackMark， 布尔throwOnFileNotFound，AssemblyLoadContext，assemblyLoadContext） 在 System.Reflection.RuntimeAssembly.InternalLoadAssemblyName（AssemblyName assemblyRef，StackCrawlMark和stackMark，AssemblyLoadContext assemblyLoadContext），位于 System.Reflection.Assembly.Load（AssemblyName assemblyRef， StackCrawlMark＆stackMark，AssemblyLoadContext，assemblyLoadContext）
在System.Reflection.Assembly.Load（AssemblyName assemblyRef）处 Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsAssembly..ctor（ICurrentDbContext currentContext，IDbContextOptions选项，IMigrationsIdGenerator idGenerator，IDiagnosticslogger1 logger) at System.RuntimeMethodHandle.InvokeMethod(Object target,Object[] arguments,Signature sig,Boolean constructor,Boolean wrapExceptions) at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr,Binder binder,Object[] parameters,CultureInfo culture) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite,RuntimeResolverContext context) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor2.VisitCallSiteMain（ServiceCallSite callSite，TArgument参数）位于 Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache（ServiceCallSite callSite，RuntimeResolverContext上下文，ServiceProviderEnginescope serviceProviderEngine，RuntimeResolverLock lockType）位于 Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache（ServiceCallSite singletonCallSite，RuntimeResolverContext上下文），位于 Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor2.VisitCallSite(ServiceCallSite callSite,TArgument argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite,TArgument argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite,ServiceProviderEnginescope scope) 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.EntityFrameworkCore.Infrastructure.Internal.InfrastructureExtensions.GetService[TService](IInfrastructure1 访问者） Microsoft.EntityFrameworkCore.Infrastructure.AccessorExtensions.GetService [TService]（IInfrastructure1 accessor) at Microsoft.EntityFrameworkCore.Design.DesignTimeServiceCollectionExtensions.<>c__displayClass1_0.<AddDbContextDesignTimeServices>b__7(IServiceProvider _) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory(FactoryCallSite factoryCallSite,RuntimeResolverContext context) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor2.VisitCallSiteMain（ServiceCallSite callSite，TArgument参数）位于 Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitdisposeCache（ServiceCallSite 的transientCallSite，RuntimeResolverContext上下文） Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor2.VisitCallSite(ServiceCallSite callSite,ServiceProviderEnginescope serviceProviderEnginescope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType) at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[T](IServiceProvider provider) at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.EnsureServices(IServiceProvider services) at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.AddMigration(String name,String outputDir,String contextType) at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigrationImpl(String name,String contextType) at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigration.<>c__displayClass0_0.<.ctor>b__0() at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__displayClass3_01.b__0（） 在 Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute（操作 动作）
我还删除了数据库，并用不同的名称重新创建了一个新数据库，但这也不起作用。
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