I have 3 project (C#) API, BLL and DAL. The DAL reference the DAL and the API reference the BLL. In my API I need to use all the CRUD functions but I can't use the function from my BLL becaus...

I had a debate with my co-worker on whether certain logic belongs in the data access or business logic layer. The scenario is, the BLL needs some data to work with. That data primarily live...

I already have a layered data access design which works well. But i dont know if it is the most suitable implementation or not. i simply want to know that BLL classes or methots should be static or...

I'm trying to write a small app with very strict boundaries between BLL and DAL and am now wondering what the best way would be to pass the data (Domain Transfer Objects) between the layers. I imp...

Solution setup: DAL (class library) BLL (class library) Common (class library (some common functionality - enums, logging, exceptions,...)) Application1 (Windows Application) Application2 (Window...

I currently have an application which consists of: User Interface (web page) BLL (Manager & Domain Objects) DAL (DataAccess class for each of my Domain Objects). I use the following in the UI ...

I'm working on a small application from scratch and using it to try to teach myself architecture and design concepts. It's a .NET 3.5, WPF application, and I'm using Sql Compact Edition as my data ...

Which approach is better: 1) to use a third-party ORM system or 2) manually write DAL and BLL code to work with the database? 1) In one of our projects, we decided using the DevExpress XPO ORM sys...

I was looking at the differences between POCO and DTO (It appears that POCO's are dto's with behaviour (methods?))and came across this article by Martin Fowler on the anaemic domain model. Throug...

I'm interested in perceived "best practice", tempered with a little dose of reality here. In a web application, do you allow your web tier to directly access the DAL, or should it go through a BLL...

There is this DAL/BLL design suggestion by Microsoft for ASP.NET (2.0) apps. I know some of the alternatives and I've read related questions here on SO. However I wonder if this proposed solution i...

I'm making my way through the early Data Access Tutorials on Microsoft's ASP.NET website and it occurred to me that this all seems awfully similar to what I have read about separating your logic an...