如何在EF4和Silverlight中封装Self-tracking POCO？
我希望在名为 ModelLibrary 的类库中拥有 EntityFramework4 模型（.edmx 和 .context.tt）以及代码生成的实体，包括。名为 EntitiesLibrary 的单独 Silverlight 类库内的部分类 (.tt)。
通过这种方式，我希望与我的 silverlight 应用程序共享 EntitiesLibrary 以进行自我跟踪。为了在 silverlight 应用程序中使用这个项目，类库必须是 Silverlight 类库，我认为这就是问题开始的地方。
在下一步中，我添加了一个 Siverlight 应用程序项目，并将其托管在一个新的 ASP Web 项目中。在 ASP Web 项目中，我添加了一个 WCF 服务以及对 ModelLibrary 和 EntitiesLibrary 的引用，并在其中创建了一些 CRUD 操作。
现在，在 Silverlight 应用程序中，我向 Wcf 服务添加了一个服务引用，当单击“确定”时，它可以发现该服务；我收到一条错误消息：
无法加载文件或程序集“System.Runtime.Serialization，Version=2.0.5.0，Culture=neutral，PublicKeyToken=7cec85d7bea7798e”或其依赖项之一。系统找不到指定的文件。
在 Service.svc.cs 上 - 虽然没有编译问题 - Resharper 向我显示了操作中使用的实体的一些错误：
Module 'System, Version=2.0 .5.0，文化......'应该被引用。
???现在我完全陷入困境了。同样不寻常的是，在 ModelLibrary 的引用下和指向 EntitiesLibrary 的 ASP Web 主机下，我看到一个黄色标记。发生这种情况只是因为后者是 Silverlight 类库类型。如果我有一个普通的类库，就不会发生这种情况。
如果有人能给我建议那就太好了 非常感谢 卡韦
I would like to have the EntityFramework4 model (.edmx and .context.tt) in a Class Library called ModelLibrary and the code generated entities incl. the partial classes (.tt) inside a separate Silverlight Class Library called EntitiesLibrary.
This way I was hoping to share the EntitiesLibrary with my silverlight application for self-tracking. In order to consume this project within the silverlight application the class library has to be a Silverlight class library and I think this is where the problem starts.
In the next step I have added a Siverlight Application project and let it to be hosted in a new ASP Web project. In the ASP Web Project I have added a WCF Service and a reference to both ModelLibrary and EntitiesLibrary and created some CRUD operations in there.
Now within the Silverlight Application I add a Service Reference to the Wcf Service, while it can discover the service, when clicking ok; I get an error message:
Could not load file or assembly 'System.Runtime.Serialization, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' or one of its dependencies. The system cannot find the file specified.
On the Service.svc.cs - while having no compiling issues - Resharper is showing me some errors on the entities used in the operations:
Module 'System, Version=2.0.5.0, Culture....' should be referenced.
??? Now I am completely stuck. Also unusual is that under references of ModelLibrary and under ASP Web host pointing to EntitiesLibrary I see a yellow marking. This happens only because the latter is of type Silverlight Class library. It doesn't happen if I had a normal class library.
Would be great if somebody had an advice for me,
Many Thanks
Kave
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我遵循了 Jenny Lerman 的“实体框架”一书，她在其中创建了一个指向单独的类库中自动生成的实体的链接。
正如我所怀疑的那样，如果我使用控制台应用程序而不是 Silverlight，并且为我的实体提供一个普通的类库，那么它会工作得很好。添加的 Webservice 参考可以与实体一起创建代理。就像书上一样。
但是，如果类库属于 Silverlight 类库类型（由于 Silverlight 程序集的限制），则由于库不匹配，无法以某种方式创建指向 CLR 4.0 Web 服务的 WCF 服务引用。
我不再深入研究这个问题，从那以后我一直在尝试让 RIA 服务发挥作用，这似乎比自我跟踪 POCO 更有前景。
然而，适当的 n 层基础设施的问题仍有待发现。
I have followed the Jenny Lerman's "Entity Framework" book, where she creates a link to the auto generated entities within a seperate Class Library.
As I had suspected it, if I would use a Console Application instead of Silverlight and have a plain Class Library for my Entities, it would work just fine. The Added Webservice reference can work with the Entities to create a proxy. Just like in the book.
However if the class library is of type Silverlight Class library - due restriction in Silverlight assemblies - the WCF service reference pointing to a CLR 4.0 webservice can't be somehow created due mismatching libraries.
I stopped digging further into this matter and have been since trying to get RIA Services working, which seems far more promosing than Self Tracking POCOs.
Yet the problems with a proper n-Tier infrastructure still remains to be discovered.