TargetInvocationException 脚手架-DbContext EF 5答案

【问题标题】：TargetInvocationException Scaffold-DbContext EF 5TargetInvocationException 脚手架-DbContext EF 5
【发布时间】：2021-08-14 23:19:03
【问题描述】：

我正在尝试运行项目位于 .net 5 中的以下脚手架。我收到此错误

我所有的项目都说

  <PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>

引用 efcore 的一个项目

<PackageReference Include="Microsoft.EntityFrameworkCore" Version="5.0.4" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Abstractions" Version="5.0.4" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Analyzers" Version="5.0.4" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="5.0.4" />
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="5.0.4" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="5.0.4">

错误

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.TypeLoadException: Could not load type 'Microsoft.EntityFrameworkCore.Internal.SemanticVersionComparer' from assembly 'Microsoft.EntityFrameworkCore, Version=5.0.4.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor..ctor(IOperationReportHandler reportHandler, IDictionary args)
   --- End of inner exception stack trace ---
   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 System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture)
   at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
   at System.Activator.CreateInstance(Type type, Object[] args)
   at Microsoft.EntityFrameworkCore.Tools.ReflectionOperationExecutor..ctor(String assembly, String startupAssembly, String projectDir, String dataDirectory, String rootNamespace, String language, String[] remainingArguments)
   at Microsoft.EntityFrameworkCore.Tools.Commands.ProjectCommandBase.CreateExecutor(String[] remainingArguments)
   at Microsoft.EntityFrameworkCore.Tools.Commands.DbContextScaffoldCommand.Execute(String[] args)
   at Microsoft.EntityFrameworkCore.Tools.Commands.CommandBase.<>c__DisplayClass0_0.<Configure>b__0(String[] args)
   at Microsoft.DotNet.Cli.CommandLine.CommandLineApplication.Execute(String[] args)
   at Microsoft.EntityFrameworkCore.Tools.Program.Main(String[] args)
Exception has been thrown by the target of an invocation.

萨法尔指挥

Scaffold-DbContext "Server=1.1.1.1,1433;Initial Catalog=First;Persist 安全信息=假；用户 ID=data;Password=data;MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=True;Connection Timeout=30;" Microsoft.EntityFrameworkCore.SqlServer -OutputDir 模型/数据库 -Force -Context S3Context -Project S3.Core.DataSync.Framework -t 数据，同步销售

【问题讨论】：

你在混合版本吗？请分享您的 .csproj 内容
请查看修改后的问题

标签： entity-framework entity-framework-core

【解决方案1】：

我有 3 个项目 1 个项目包含 EF Core。如果我加载所有三个项目并将引用 EF Core 的项目设置为“设置为启动”，我不再有这个问题。一旦我设置了启动项目，我就会收到此错误

【讨论】：