Question

Hi I have 2 data contexts that maps different schemas on a SQL Server database, but then I need to create 1 sdf database file (SQL Compact) per schema and use the same data contexts, and I have some entities related like this:

//context 1
class A
{
    int Id
    ...
    ICollection<B> Bs
}

//context 2
class B
{
    int Id
    ...
}

On server it’s easy I just need to specify the table for this relation, but on clients I have this entities splitted on different databases.

So I need a navigation property on 1 entity (A) from context 1 (database_A.sdf) to relate with 1 entity (B) from context 2 (database_B.sdf).

Thanks in advance.

Answer 1

Those classes you are implemented are not Contexts those are Entities. The Context in EF should inherit from ObjectContext or DbContext, In your case I think you have 2 separate Entities in 2 different Database. You can do this to pointing several database

// Associate with first entity
public Context1 : ObjectContext
{
    prop IDbSet<A> ADbSet{ get; set; }
    ...
}

// Associate with Second entity
public Context2 : ObjectContext
{
    prop IDbSet<B> BDbSet{ get; set; }
    ...
}

public void ChangeDb(string dbName)
{
    Context1 context = new Context1();
    context.ChangeDatabase(dbName);
}

Hope this help.