entity-framework-4.1

I'm using EF4 Code First and I have a property: public byte[] Bytes {get;set;} can I make this property load lazily ( only when it's needed) ? Table spliting works in EF 4.1 RC: public class Item { public int Id { get; set; } ... public virtual ItemDetail ItemDetail { get; set; } } public class ItemDetail { public int Id { get; set; } public byte[] Bytes { get; set; } } public class Context : DbContext { public DbSet<Item> Items { get; set; } public DbSet<ItemDetail> ItemDetails { get; set; } protected override void OnModelCreating(DbModelBuilder modelBuilder) { base.OnModelCreating

I tried to call a stored procedure from entity framework 4.1 (mvc 3 web application). Its not throwing an exception but the insert/update is not happening? When I manually executed the stored proc it works. CREATE PROCEDURE [dbo].[SP_AddUpdateResponse] @QuestionID int, @UserID int, @AnswerValue nvarchar(2000), @ReviewID int AS MERGE [dbo].[Responses] AS [Target] USING (SELECT @QuestionID, @UserID, @AnswerValue, @ReviewID) AS [Source] ([QuestionID], [UserID], [AnswerValue], [ReviewID] ) ON [Target].[QuestionID] = [Source].[QuestionID] AND [Target].[ReviewID] = [Source].[ReviewID] WHEN MATCHED

I have come to a conclusion that I should define both Independent Association and Foreign Key Association in My Code-First design. e.g: public class Book { public int ID {get; set;} public int AuthorID {get; set;} [ForeignKey("AuthorID")] public Author Author {get; set;} } With the above definition, do I have to update AuthorID when I want to change the book's author, Or just using the below line is enough? myBook.Author = author; Am I going to get a null exception on the above line if that is the first time I'm defining an author for the book? (Does EF initialize book's author automatically

I'm a bit confused about Entity framework, I would like to use code-first approach; infact I would like to write how my database tables are composed through class definition. The main problem is that I need to create a database (or open it) by choosing dinamically it's path (the user can choose what database to open and can create new one when he wants). I've chosen Sql server compact to achieve this, however I still don't understand how to use code-first approach for this situation because I don't understand how to choose where database should be created with code-first approach, if is

I have seen several posts about this but have not been able to create a usable solution from the responses. Perhaps due to a lack of understanding. The hosting provided requires that an identical code base be used on staging and production, including connection string. How do I switch the connection string for DbContext? I understand I can do something like this: public FooEntities() : base("ApplicationServices") { } But this is not dynamic - it merely sets it at runtime. So how would I actually CHOOSE the connection string at runtime? Yes public FooEntities() : base("ApplicationServices") { }