我有以下问题:我尝试将我的DbContext
类放入一个单独的类库中,但它不起作用。
我收到以下错误:
异常调用" SetData"用" 2"参数:"键入' Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProject' in assembly' Microsoft.VisualStudio.ProjectSystem.VS.Implementation,Version = 15.0.0.0,Culture = neutral,PublicKeyToken = b03f5f7f11d50a3a'未标记为可序列化。"
在D:\ Projekte \ Seminar_Tool_Online \ Seminar_Tool_Online \ packages \ EntityFramework.6.2.0 \ tools \ EntityFramework.psm1:720 char:5
+ $ domain.SetData(' project',$ project)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo:NotSpecified:(:) [],MethodInvocationException
+ FullyQualifiedErrorId:SerializationException异常调用" SetData"用" 2"参数:"键入' Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProject' in assembly' Microsoft.VisualStudio.ProjectSystem.VS.Implementation,Version = 15.0.0.0,Culture = neutral,PublicKeyToken = b03f5f7f11d50a3a'未标记为可序列化。"
在D:\ Projekte \ Seminar_Tool_Online \ Seminar_Tool_Online \ packages \ EntityFramework.6.2.0 \ tools \ EntityFramework.psm1:721 char:5
+ $ domain.SetData(' contextProject',$ contextProject)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 〜
+ CategoryInfo:NotSpecified:(:) [],MethodInvocationException
+ FullyQualifiedErrorId:SerializationExceptionSystem.NullReferenceException:未将对象引用设置为对象的实例 at System.Data.Entity.Migrations.Extensions.ProjectExtensions.GetPropertyValue [T](Project project,String propertyName)
在System.Data.Entity.Migrations.MigrationsDomainCommand.GetFacade(String configurationTypeName,Boolean useContextWorkingDirectory)
在System.Data.Entity.Migrations.EnableMigrationsCommand.FindContextToEnable(String contextTypeName)
在System.Data.Entity.Migrations.EnableMigrationsCommand。<> c__DisplayClass2。< .ctor> b__0()
在System.Data.Entity.Migrations.MigrationsDomainCommand.Execute(Action命令)
对象引用未设置为对象的实例。
我有一个名为" Seminar_Tool_Online"的ASP.NET MVC 5项目。这是我的启动项目。在配置文件中是Entity Framework所需的一切。
<configSections>
<section name="entityFramework"
type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
requirePermission="false"/>
</configSections>
<connectionStrings>
<add name="AccountConnection"
connectionString="Server=...; Database=...;User Id = ...; password=...; Integrated Security=False"
providerName="System.Data.SqlClient" />
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework"/>
<providers>
<provider invariantName="System.Data.SqlClient"
type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer"/>
</providers>
</entityFramework>
我的类库名为Seminar_Tool_Datenbank
,其中包含以下DbContext
类:
public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
public ApplicationDbContext()
: base("AccountConnection", throwIfV1Schema: false)
{
}
public static ApplicationDbContext Create()
{
return new ApplicationDbContext();
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
}
}
所以我在Package Manager控制台中使用以下命令尝试了它:
Enable-Migrations -EnableAutomaticMigrations -ProjectName Seminar_Tool_Datenbank -StartupProjectName Seminar_Tool_Online
我已经尝试过这里的解决方案:
对我来说没有任何作用,我仍然会得到同样的错误。在这两个项目中,我都使用EF 6.2和.Net 4.5.1
有人可以帮助我吗?
更新
这可能是问题吗?
Make EF NuGet package / migrations and EF Tools work with new csproj format
答案 0 :(得分:0)
我可以通过将csproj文件更改为VS 2015的旧标准来解决问题。