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How to write business access layer in asp net

124 6 months ago
Net ].. Net Application.. To support many languages.. Products table should be split into 2 tables. Data Imports System.
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Walkthrough: Creating the Data Access and Business Logic Layers in ASP.NET

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Tutorials » Creating a Layered Business Application in Visual Studio

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Architecture of Business Layer working with Entity Framework (Core and v6) – revisited

In this tutorial we'll see how to centralize your business rules into a Business Logic Layer BLL that serves as an intermediary for data exchange between the presentation layer and the DAL. The Data Access Layer DAL created in the first tutorial cleanly separates the data access logic from the presentation logic. However, while the DAL cleanly separates the data access details from the presentation layer, it does not enforce any business rules that may apply. For example, for our application we may want to disallow the CategoryID or SupplierID fields of the Products table to be modified when the Discontinued field is set to 1, or we might want to enforce seniority rules, prohibiting situations in which an employee is managed by someone who was hired after them.
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View layer is responsible for data representation, the controller layer is responsible for receiving and replying to requests, and models are used as two-way information carriers between the previous two layers. This separation of concerns is convenient for developers because there is no spaghetti mix of HTML layout and business logic. A natural question arises — Where do I put my domain specific logic? There are three ways that developers tend to go for:.
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