LinqToSql

Question

Hello,

I would like to know what is your idea of a N-layer application using LinqToSql. I used to work in the following way:

UI

BLL

DAL

Entities

In this model, is it best to create the model inside the Entities Project ou directly inside the DAL?

Thanks in advance.

 

Answer 1

Greetings,

Case 1 : Without BLL(BUSINESS LOGIC LAYER).
Generic Flow

                  UI <==> ADO.NET Entity Framework(DAL) <==> Database (SqlServer 2005 or SqlServer 2008).

Case 2: With BLL(BUSINESS LOGIC LAYER).
Generic Flow

  UI <==> BLL <==> ADO.NET Entity Framework(DAL) <=> Database (SqlServer 2005 or SqlServer 2008).

Note this Point:

• Here we are using BLL because in the application architecture requires communication with Bitztalk sever or any other business components. It will depends application software architecture.

Some links are given below


Entity Framework Terminology

• http://msdn.microsoft.com/en-us/library/bb387161.aspx

Introducing the Entity Framework

• http://msdn.microsoft.com/en-us/library/bb399567.aspx

ADO.NET Entity Framework

• http://msdn.microsoft.com/en-us/library/bb399572.aspx

Quickstart (Entity Framework)
http://msdn.microsoft.com/en-us/library/bb399182.aspx

Application Scenarios (Entity Framework)

• http://msdn.microsoft.com/en-us/library/bb738689.aspx

Entity Framework Features

• http://msdn.microsoft.com/en-us/library/bb896338.aspx

Entity Framework Terminology

• http://msdn.microsoft.com/en-us/library/bb387161.aspx

Entity Framework Resources

• http://msdn.microsoft.com/en-us/library/bb738448.aspx

Hope this helps you out.

Take Care

PL

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Helping People To Solve Technical Problems

Answer 2

I am currently writing an article series over on DotNetSlackers.com where I discuss the various forms of what people think is an nTier application vs. what actually is an nTier.  Take a look at the Three Tiers for MVC series here:

http://dotnetslackers.com/projects/StackOverflowInspiredKnowledgeExchange/

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Andrew Siemer www.andrewsiemer.com blog.andrewsiemer.com www.socialnetworkingin.net