Problem running project after Identity scaffolding in ASP.NET Core MVC project on Linux

问题

I've tried adding

<PackageReference Include="Microsoft.AspNetCore.Razor.Runtime" Version="2.2.0" />

However 2.2.0 is the latest version available at this time, which doesn't match the error. The error is still the same after rebuilding the app.

project.csproj:

<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <RuntimeIdentifier>linux-x64</RuntimeIdentifier>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="3.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.Identity.UI" Version="3.1.1" />
    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.1" />

    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="3.1.1">
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
      <PrivateAssets>all</PrivateAssets>
    </PackageReference>

    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.1.1" />

    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.1.1">
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
      <PrivateAssets>all</PrivateAssets>
    </PackageReference>

    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.1.0" />

    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="3.1.0" />
  </ItemGroup>
</Project>

Full error:

Unhandled exception. System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.AspNetCore.Razor.Runtime, Version=3.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The system cannot find the file specified.

File name: 'Microsoft.AspNetCore.Razor.Runtime, Version=3.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' at System.ModuleHandle.ResolveTypeHandleInternal(RuntimeModule module, Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext) at System.Reflection.RuntimeModule.ResolveType(Int32 metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments) at System.Reflection.CustomAttribute.FilterCustomAttributeRecord(MetadataToken caCtorToken, MetadataImport& scope, RuntimeModule decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, ListBuilder1& derivedAttributes, RuntimeType& attributeType, IRuntimeMethodInfo& ctor, Boolean& ctorHasParameters, Boolean& isVarArg) at System.Reflection.CustomAttribute.AddCustomAttributes(ListBuilder1& attributes, RuntimeModule decoratedModule, Int32 decoratedMetadataToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, ListBuilder1 derivedAttributes) at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType) at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType) at System.Reflection.RuntimeAssembly.GetCustomAttributes(Type attributeType, Boolean inherit) at System.Attribute.GetCustomAttributes(Assembly element, Type attributeType, Boolean inherit) at System.Attribute.GetCustomAttribute(Assembly element, Type attributeType, Boolean inherit) at System.Reflection.CustomAttributeExtensions.GetCustomAttribute[T](Assembly element) at Microsoft.AspNetCore.Mvc.ApplicationParts.ApplicationPartFactory.GetApplicationPartFactory(Assembly assembly) at Microsoft.AspNetCore.Mvc.ApplicationParts.ApplicationPartManager.PopulateDefaultParts(String entryAssemblyName) at Microsoft.Extensions.DependencyInjection.MvcCoreServiceCollectionExtensions.GetApplicationPartManager(IServiceCollection services) at Microsoft.Extensions.DependencyInjection.MvcCoreServiceCollectionExtensions.AddMvcCore(IServiceCollection services) at Microsoft.Extensions.DependencyInjection.MvcServiceCollectionExtensions.AddControllersCore(IServiceCollection services) at Microsoft.Extensions.DependencyInjection.MvcServiceCollectionExtensions.AddControllersWithViewsCore(IServiceCollection services) at Microsoft.Extensions.DependencyInjection.MvcServiceCollectionExtensions.AddControllersWithViews(IServiceCollection services) at Microsoft.Extensions.DependencyInjection.MvcServiceCollectionExtensions.AddMvc(IServiceCollection services) at Microsoft.AspNetCore.Identity.IdentityBuilderUIExtensions.AddRelatedParts(IdentityBuilder builder) at Microsoft.AspNetCore.Identity.IdentityBuilderUIExtensions.AddDefaultUI(IdentityBuilder builder) at Microsoft.Extensions.DependencyInjection.IdentityServiceCollectionUIExtensions.AddDefaultIdentity[TUser](IServiceCollection services, Action1 configureOptions) at Microsoft.Extensions.DependencyInjection.IdentityServiceCollectionUIExtensions.AddDefaultIdentity[TUser](IServiceCollection services) at pieshop.Startup.ConfigureServices(IServiceCollection services) in /home/juan/code/web-projects/pieshop/src/Startup.cs:line 36 at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.InvokeCore(Object instance, IServiceCollection services) at Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.<>c__DisplayClass9_0.g__Startup|0(IServiceCollection serviceCollection) at Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.Invoke(Object instance, IServiceCollection services) at Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.<>c__DisplayClass8_0.b__0(IServiceCollection services) at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.UseStartup(Type startupType, HostBuilderContext context, IServiceCollection services) at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.<>c__DisplayClass12_0.b__0(HostBuilderContext context, IServiceCollection services) at Microsoft.Extensions.Hosting.HostBuilder.CreateServiceProvider() at Microsoft.Extensions.Hosting.HostBuilder.Build() at pieshop.Program.Main(String[] args) in /home/juan/code/web-projects/pieshop/src/Program.cs:line 10

Line 36 of Startup.cs:

services.AddDefaultIdentity<IdentityUser>()
    .AddEntityFrameworkStores<AppDbContext>();

Solved! I uninstalled the dotnet packages separately in the following order: dotnet-sdk-bin (AUR) dotnet-runtime-bin (AUR) dotnet-host-bin (AUR)

Then I built these same packages in the reverse order. Now they are all at 3.1.1.sdk101-2 as of today and my project is running again.

回答1:

I had noticed the same thing, please look at the ms updates for the framework, there was an update a few days ago that the newer nuget packages expect to have been installed.

The issue you are having is that the nuget packages are not matching your SDk, at least that's what I had. After doing a windows update and installing the new Core Runtime, Version=3.1.1.0 all was okey

回答2:

I solved the problem by reinstalling: .Net Core SDK 3.1.101 and ASP.NET Core Runtime 3.1.1

https://dotnet.microsoft.com/download/dotnet-core/3.1

回答3:

The issue is with the latest 3.1.1 release of ASP.NET Core Identity Packages. It works fine when I revert to the previous stable 3.1.0 version. See below snapshot:

To me, installing the latest SDK and Core Runtime did not resolve the issue.

Affected Libraries

来源：https://stackoverflow.com/questions/59777283/problem-running-project-after-identity-scaffolding-in-asp-net-core-mvc-project-o