Hi,
i am using the Ado.Net Entity Framework with Code Only (Tutorial at: ADO.NET team blog)
and i want to be as much database independent as possible.
In my first approach i just want to go for
Sql Express
and Sql Compact databases.
With
Sql Express everthing works fine but with
Sql Compact i get the exception mentioned in my question.
Does anybody knows if it is possible to connect to
Sql Compact with the Code Only approach? (with a generated .edmx file for a
Sql Compact database everthing works fine, but i want to use code only!)
Here is some code:
My Class which is building the DataContext:
public class DataContextBuilder : IDataContextBuilder
{
private readonly DbProviderFactory _factory;
public DataContextBuilder(DbProviderFactory factory)
{
_factory = factory;
}
#region Implementation of IDataContextBuilder
public IDataContext CreateDataContext(string connectionString)
{
var builder = new ContextBuilder<DataContext>();
RegisterConfiguration(builder);
var connection = _factory.CreateConnection();
connection.ConnectionString = connectionString;
var ctx = builder.Create(connection);
return ctx;
}
#endregion
private void RegisterConfiguration(ContextBuilder<DataContext> builder)
{
builder.Configurations.Add(new PersonConfiguration());
}
}
The line
var ctx = builder.Create(connection);
is throwing the exception.
The IDataContext is just a simple Interface for the ObjectContext:
public interface IDataContext
{
int SaveChanges();
IObjectSet<Person> PersonSet { get; }
}
My connection string is configured in the app.config:
<connectionStrings>
<add name="CompactConnection" connectionString="|DataDirectory|\Test.sdf"
providerName="System.Data.SqlServerCe.3.5" />
</connectionStrings>
And the build action is started with
var cn = ConfigurationManager.ConnectionStrings["CompactConnection"];
var factory = DbProviderFactories.GetFactory(cn.ProviderName);
var builder = new DataContextBuilder(factory);
var context = builder.CreateDataContext(cn.ConnectionString);
