In n-tier architecture application we need to use at least 3 layers.
Complex, Large and medium should be logically divided in to the layers. In order to make a clear separation and better understanding we need to user layers. Below are 3 most common layers which is used in most of the application.
1. Presentation layer
2. Business logic layer
3. Data access Layer
Presentation Layer
The presentation layer is that part of an application that displays the UI to the user. For Web applications, this is the HTML and JavaScript that is displayed in the user’s browser. Other applications, like windows based, mobile, and web services could use other display methods. UI interface is known as presentation layer. In .net web application usually the container to place the controls is Web forms. And in windows application it is web forms.
Business logic layer
Business logic layer will have the business logic for the application. Business rules included such things as computational formulas, what data is accepted or displayed, transaction control, data integrity, etc. Never call ADO.Net directly from the business layer.
Data access Layer
The Data Access layer is that part of the application where all of the data access and data update logic is placed. Data access/update code (calls to the ADO.Net API) will be placed only in the data access layer.
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| Author: devi 20 Aug 2008 | Member Level: Silver Points : 0 |
i have to disable only one menuitem in menubar ctrl how can i do
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| Author: D.Jeya kumar(JK) 21 Aug 2008 | Member Level: Diamond Points : 0 |
Hi,
Is it a Web or windows menu?
Regards
JK
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