Question

I am trying to create a simple EF code first sample using SQL server compact edition 4.0.
Technologies used include: Visual Studio 2012 Ultimate.

So i created a simple poco class:

namespace MvcApplication2.Models
{
    public class Customer
    {
        public int CustomerId { get; set; }
        public string CustomerName { get; set; }
    }
}

And a simple context class:

namespace MvcApplication2.Models
{
    public class CustomerEntity : DbContext
    {
        public DbSet<Customer> Customers { get; set; }
    }
}

Then I tried to create a controller class with the template: MVC Controller with read/write actions and views using entity framework.

• Model class -> Customer
• Data context class -> CustomerEntity

I got the following error:

Unable to retreive metadata for … Using the same dbcompiledmodel to
create contexts against different types of database servers is not
supported. …

I should say this exact same code worked without problem using LocalDB.

The only difference that I thought was needed, was the addition of the following to the web.config file.

<add name="CustomerEntity"
     connectionString="Data Source=|DataDirectory|CustomerEntity.sdf"
     providerName="System.Data.SqlServerCe.4.0" />

Am I missing something else?

I know I can’t be the only one having this problem.

Answer 1

Your problem in dublicate DB in EF cache and DB in your App_Data. The easiest way to resolve this problem is to comment your default constructor CustomerEntity, to create controller from template and then uncomment it.