Create a DbSet dynamically in Entity Framework?

问题:

In LINQ to SQL, I can create a repository dynamically using DataContext.GetTable<T>. Is there a similar way to do this in Entity Framework 4 other than declaring the properties on the specific DbContext? For example:

public MyDbContext: DbContext
{
    public DbSet<MySet> MySets {get; set;}
}

I would like to know how can I create/get a reference to MySets dynamically as I can with LINQ to SQL as in:

var mySet = MyDbContext.GetTable<MySet>();

回答1:

DbContext has method for this:

  var set = context.Set<MyEntity>();

回答2:

Use:

DbSet<MyEntity> set = context.Set<MyEntity>();

Or, if you can't use the generic method:

DbSet set = context.Set(
    typeof( MyEntity )
);

Don't worry about second-loading and duplicating a POCO. Sets are cached internally by the Context.