Entity framework 4 使用DI工具unity创建EF ObjectContext对象

我尝试使用下面的脚本在容器中注册类型，效果很好

 Container.RegisterType<System.Data.Objects.ObjectContext,
              ExSS.Repository.MyEntity>( "myentity", new InjectionConstructor());

说明：

An unhandled exception occurred during the execution of the current web
request. Please review the stack trace for more information about the error 
and where it originated in the code. 

例外情况详情：

System.InvalidOperationException: The type name or alias ObjectContext could 
not be resolved. Please check your configuration file and verify this type name.

堆栈跟踪是：

[InvalidOperationException: The type name or alias ObjectContext could not be resolved. Please check your configuration file and verify this type name.]
   Microsoft.Practices.Unity.Configuration.ConfigurationHelpers.TypeResolverImpl.ResolveType(String typeNameOrAlias, Boolean throwIfResolveFails) +200
   Microsoft.Practices.Unity.Configuration.ConfigurationHelpers.TypeResolver.ResolveType(String typeNameOrAlias) +59
   Microsoft.Practices.Unity.Configuration.RegisterElement.GetRegisteringType() +70
   Microsoft.Practices.Unity.Configuration.RegisterElement.ConfigureContainer(IUnityContainer container) +111
   Microsoft.Practices.Unity.Configuration.ContainerConfiguringElement.ConfigureContainerInternal(IUnityContainer container) +39
   Microsoft.Practices.Unity.Configuration.<>c__DisplayClass1.<ConfigureContainer>b__0(ContainerConfiguringElement element) +42
   Microsoft.Practices.ObjectBuilder2.EnumerableExtensions.ForEach(IEnumerable`1 sequence, Action`1 action) +200
   Microsoft.Practices.Unity.Configuration.ContainerElement.ConfigureContainer(IUnityContainer container) +269
   Microsoft.Practices.Unity.Configuration.UnityConfigurationSection.Configure(IUnityContainer container, String configuredContainerName) +133
   Microsoft.Practices.Unity.Configuration.UnityContainerExtensions.LoadConfiguration(IUnityContainer container, UnityConfigurationSection section, String containerName) +70

[InvalidOperationException:无法解析类型名或别名ObjectContext。请检查配置文件并验证此类型名。]
Microsoft.Practices.Unity.Configuration.ConfigurationHelpers.TypeResolverImpl.ResolveType（字符串typeNameOrAlias，布尔throwIfResolveFails）+200
Microsoft.Practices.Unity.Configuration.ConfigurationHelpers.TypeResolver.ResolveType（字符串typeNameOrAlias）+59
Microsoft.Practices.Unity.Configuration.RegisterElement.GetRegisteringType（）+70
Microsoft.Practices.Unity.Configuration.RegisterElement.ConfigureContainer（IUnityContainer容器）+111
Microsoft.Practices.Unity.Configuration.ContainerConfiguringElement.ConfigureContainerInternal（IUnityContainer容器）+39
Microsoft.Practices.Unity.Configuration.c___显示类1.b___0（ContainerConfigurangElement）+42
Microsoft.Practices.ObjectBuilder2.EnumerableExtensions.ForEach（IEnumerable`1序列，Action`1 Action）+200
Microsoft.Practices.Unity.Configuration.ContainerElement.ConfigureContainer（IUnityContainer容器）+269
Microsoft.Practices.Unity.Configuration.UnityConfigurationSection.Configure（IUnityContainer容器，字符串configuredContainerName）+133
Microsoft.Practices.Unity.Configuration.UnityContainerExtensions.LoadConfiguration（IUnityContainer容器，UnityConfiguration节，字符串容器名称）+70

---

谁能给点建议吗？非常感谢

您的配置错误。应该是：

<alias alias="ObjectContext" type="System.Data.Objects.ObjectContext, System.Data.Entity" />
<alias alias="MyEntity" type="ExSS.Repository.MyEntity, ExSS.Repository"/>
<register type="ObjectContext" mapTo="MyEntity" name="myentity">
    <constructor />
</register>

---

找到原因，它与CLR无法正确加载程序集System.Data.Entity有关。应添加publicktokenkey和文化及版本。以下配置工作：

<alias alias="ObjectContext" type="System.Data.Objects.ObjectContext, System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" /> 
<alias alias="MyEntity" type="ExSS.Repository.MyEntity, ExSS.Repository"/> 
<register type="ObjectContext" mapTo="MyEntity" name="myentity"> 
  <constructor /> 
</register>

谢谢您的回复。我如上所述修改了配置，得到了与之前相同的错误消息。似乎无法从xml注册对象，我首先在代码中注册它：_container.RegisterType（“myentity”，new InjectionConstructor（））；在xml中配置其他类，其中一些类具有依赖于System.Data.Objects.ObjectContext的字段，在xml中是这样的：但遗憾的是，我收到了相同的错误消息。容器ExsUnityCfg似乎无法解析代码中定义的ObjectContext

<alias alias="ObjectContext" type="System.Data.Objects.ObjectContext, System.Data.Entity" />
<alias alias="MyEntity" type="ExSS.Repository.MyEntity, ExSS.Repository"/>
<register type="ObjectContext" mapTo="MyEntity" name="myentity">
    <constructor />
</register>

<alias alias="ObjectContext" type="System.Data.Objects.ObjectContext, System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" /> 
<alias alias="MyEntity" type="ExSS.Repository.MyEntity, ExSS.Repository"/> 
<register type="ObjectContext" mapTo="MyEntity" name="myentity"> 
  <constructor /> 
</register>