在VS2012中使用动态数据实体网站时出错

Question

I decided to use Dynamic Data Entities Web Site in VS2012.

So, I created this Web Site, then added App_Code directory and added a new edmx to it and named it myDB.edmx . After that I uncommented the code line in Global.asax which registers the entity context :

DefaultModel.RegisterContext(typeof(myDBEntities), new ContextConfiguration() { ScaffoldAllTables = true });

But when I run the website this error occurs :

The context type 'myDBEntities' is not supported.

how can I fix it?

ps: You now there are some differences between using L2S by Dynamic Data L2S Web Site and using Entity Framework by Dynamic Data Entities Web Site .

Answer 1

我仍在寻找原因，但是现在唯一的选择是在VS2010中创建项目然后将项目迁移到VS2012然后我在运行应用程序时没有任何问题

Answer 2

This problem happens because in Visual Studio 2012 you get DbContext (instead of ObjectContext as in Visual Studio 2010) code generated by default for all new models created with the EF Designer. In order to solve one you need to revert back to ObjectContext code generation.

For more information see Reverting to ObjectContext in EF Designer .

Answer 3

1. Delete the TT files from the model

2. Change the "Code Generation Stategy" to "Default"

Answer 4

Within the Global.asax file, uncomment the other RegisterContext line instead.

 DefaultModel.RegisterContext( _
           New System.Func(Of Object)(Function() DirectCast(New [Your edmx](), IObjectContextAdapter).ObjectContext), _
           New ContextConfiguration() With {.ScaffoldAllTables = True} _
         )