data-access-layer

I am in the middle of design an application to issue and store invoices for an organization. The problem is the organization is not stable at all. There are many types of invoices and they may increase and change. First, I tried to use tables in my DAL, one table to store invoices, one for invoice fields, and one for invoice field values. The problem was, this way needs Reflection to detect fields later, and this may slow the application when invoice contains plenty items. Second, I tried to keep core of invoice data as two tables: invoices and invoice items. Other fields are fully catchable

I've been attempting to walk through the "Creating a Data Access Layer" tutorial found http://www.asp.net/learn/data-access/tutorial-01-cs.aspx I create the DB connection, create the typed dataset and table adapter, specify the sql, etc. When I add the code to the presentation layer (in this case a page called AllProducts.aspx) I am unable to find the NorthwindTableAdapters.ProductsTableAdapter class. I tried to import the NorthwindTableAdapters namespace, but it is not showing up. Looking in the solution explorer Class View confirms that there is a Northwind class, but not the namespace I'm

I understand separating the data layer objects (DAOs) in their own layer that abstracts the data access logic and data source specifics from service and business layers as outlined in DAO and Service layers (JPA/Hibernate + Spring) and other questions. I have experience creating these layers, but I've always used either raw JDBC or similar lower level ways of interfacing with the DB (such as Spring's SimpleJDBC), and am new to Hibernate. My question comes in that in raw JDBC or other ways where you are actually dealing with a result set (or a thin wrapper around it) at the data access layer,

I understand that data access layer's or simply DAL's are used to access and retrieve information from a database, but i'm not sure how to call the DAL data within the controller. For instance i made this static class within my DAL but i'm not sure as to how to call it to my controller, any help or guideline would be appreciated. DohvatiMetodu is the name of the class. public static FormInputViewModel DohvatiMetodu() { var viewModel = new FormInputViewModel(); var metoda = new List<Metoda>(); var metodaList = new List<SelectListItem>(); using (var db = new ApplicationDbContext()) { metoda = db

While designing a new multi-tier application, I am facing difficulty making a decision for my DAL and BLL layer design. Suppose I have Employee information spread in multiple tables having both 1-1 and 1-Many relationship with master table. Few are listed below: Employee (Master Table), Employee_Contact_Detail, Employee_Education, Employee_Skill, Employee_Experience At DAL level, I have a generic data repository providing common functionality like GetAll, GetSingle, Add, Edit, Delete for each table. Now, should I design my “Employee Data Repository” derived from my “Generic Data Repository”