我已经具有三个layers.I使用的EntityFramework 6.1和代码使用现有database.The三层第一迁移是一个应用程序在下面给出:启用迁移不工作
1. Presententation层:ConceptuCodeFirstMigrationDemo 只需为了简单起见,控制台应用程序
数据层语境下设和Initializer.The代码如下给出:
namespace ConceptuCodeFirstMigrationDemo.Data.DataContext
{
using System;
using System.Data.Entity;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using ConceptuCodeFirstMigrationDemo.Domain;
public partial class ConceptuContext : DbContext,IDisposable
{
public ConceptuContext()
: base("name=ConceptuContext")
{
}
public virtual DbSet<User> Users { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<User>()
.WithRequired(e => e.User)
.HasForeignKey(e => e.CreatedBy)
.WillCascadeOnDelete(false);
}
}
}
ConceptuInitializer.Cs
namespace ConceptuCodeFirstMigrationDemo.Data.DataContext
{
public class ConceptuInitializer: System.Data.Entity.CreateDatabaseIfNotExists<ConceptuContext>
{
}
}
的AppConfig:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<entityFramework>
<contexts>
<context type="ConceptuCodeFirstMigrationDemo.Data.DataContext.ConceptuContext, ConceptuCodeFirstMigrationDemo.Data">
<databaseInitializer type="ConceptuCodeFirstMigrationDemo.Data.DataContext.ConceptuInitializer, ConceptuCodeFirstMigrationDemo.Data" />
</context>
</contexts>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
<connectionStrings>
<add name="ConceptuContext" connectionString="data source=AMITABHA-PC;initial catalog=Conceptu;user id=sa;password=lovediya;MultipleActiveResultSets=True;App=EntityFramework" providerName="System.Data.SqlClient" />
</connectionStrings>
</configuration>
领域层:例如由用户
实体类的写一个新的类时,我尝试使用,使迁移后启用迁移 显示 程序集中找不到任何上下文类型'ConceptuCod eFirstMigrationDemo”。
后我尝试以下命令: ENABLE-迁移-ContextTypeName ConceptuCodeFirstMigrationDemo.Data.DataContext.ConceptuContext
这表明以下错误 上下文类型 'ConceptuCodeFirstMigrationDemo.Data.DataContext.ConceptuContext' 未找到在程序集'ConceptuCodeFirstMigrationDemo'中。
后我尝试以下命令 启用-迁移ConceptuCodeFirstMigrationDemo.Data.DataContext.ConceptuContext
它显示以下错误
启用-迁移:位置参数不能被发现,接受参数' ConceptuCodeFirstMigrationDemo.Data.DataContext.Concept uContext'。 在行:1字符:18 +启用-迁移< < < < ConceptuCodeFirstMigrationDemo.Data.DataContext.ConceptuContext + CategoryInfo:InvalidArgument:(:) [启用-迁移],ParameterBindingException + FullyQualifiedErrorId:PositionalParameterNotFound,启用的迁移
是位于不同项目中的三层'Presententation Layer','Data Layer'和'Domain Layer'吗? –
是的,他们在不同的项目。 – Joydip