添加迁移Exeception

当我尝试添加迁移我得到这个错误：添加迁移Exeception

PM> add-migration RestrictPromotionContentAndTitle 
    System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.Build.Framework, Version=15.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified. 
     at BrightInfo.Infrastructure.Settings.DbAudit.AuditDbContext..ctor(String connString) 
     at BrightInfo.Infrastructure.Settings.BrightInfoContext..ctor(Boolean proxyCreationEnabled, Boolean lazyLoadingEnabled) in C:\Projects\BrightInfo\BrightInfo.Infrastructure.Settings\BrightInfoContext.cs:line 124 
     at BrightInfo.Infrastructure.Settings.BrightInfoContext..ctor() in C:\Projects\BrightInfo\BrightInfo.Infrastructure.Settings\BrightInfoContext.cs:line 113 
     --- End of inner exception stack trace --- 
     at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) 
     at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) 
     at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) 
     at System.Activator.CreateInstance(Type type, Boolean nonPublic) 
     at System.Activator.CreateInstance(Type type) 
     at System.Data.Entity.Infrastructure.DbContextInfo.<CreateActivator>b__0() 
     at System.Data.Entity.Infrastructure.DbContextInfo..ctor(Type contextType, DbProviderInfo modelProviderInfo, AppConfig config, DbConnectionInfo connectionInfo) 
     at System.Data.Entity.Infrastructure.DbContextInfo..ctor(Type contextType) 
     at System.Data.Entity.Migrations.DbMigrator..ctor(DbMigrationsConfiguration configuration, DbContext usersContext) 
     at System.Data.Entity.Migrations.DbMigrator..ctor(DbMigrationsConfiguration configuration) 
     at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.GetMigrator() 
     at System.Data.Entity.Migrations.Design.ToolingFacade.GetPendingMigrationsRunner.RunCore() 
     at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.Run() 
    Exception has been thrown by the target of an invocation.

谁不知道如何解决这个问题？在此先感谢。

P.S：我忘了，当我切换到包管理控制台我得到这个错误信息说：

Unable to find type [NuGet.PackageManager]. Make sure that the assembly that contains this type is loaded. 
At C:\Projects\BrightInfo\packages\T4Scaffolding.Core.1.0.0\tools\init.ps1:4 char:5 
+ if ([NuGet.PackageManager].Assembly.GetName().Version -lt 1.4) 
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
    + CategoryInfo   : InvalidOperation: (NuGet.PackageManager:TypeName) [], RuntimeException 
    + FullyQualifiedErrorId : TypeNotFound

是否有人知道如何解决它？谢谢。

来源

2017-09-17 Иван Харюк

你做出的最后一项改变是什么？ – ASpirin

这是我第一次尝试在Visual Studio 2017中迁移。 –

似乎你没有在你的项目中正确引用dll。

无法加载文件或程序集“Microsoft.Build.Framework，Version = 15.1.0.0，Culture = neutral，PublicKeyToken = b03f5f7f11d50a3a”或其某个依赖项。该系统找不到指定的文件。 at ...

如果您可以添加适当的dll和clean解决方案，重新构建解决方案，然后再试一次，您应该成功执行。如果进一步的错误仍然存在，请发布您的迁移细节以更好地理解和帮助您。

HTH

来源

2017-09-17 16:06:23 Saravanan

是的，我已阅读有关此问题https://developercommunity.visualstudio.com/content/problem/25424/error-running-entity-framework-6- code-first-migrat.html与相关链接，我已将它们更改为绝对路径。 –

但它没有帮助。 –

添加迁移Exeception

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