3.5 Application Architecture and Design by Vivek Thakur

By Vivek Thakur

; 3.5 program structure and layout КНИГИ ;РАЗНОЕ Название: 3.5 software structure and layout Автор: Vivek Thakur Издательство: Packt Publishing ISBN: 1847195504 Год: 2008 Формат: PDF Размер: 3.29 MB Страниц: 260 Качество: Хорошее Язык: АнглийскийОписание книги:Application structure is a vital ability for ASP.NET builders. it truly is constantly tempting to leap in and begin coding, yet making plans your structure early within the venture will depart you with an exceptional program that scales good, is straightforward to switch and expand, and saves you effort and time afterward. As companies fight to regulate their expenses, writing reliable code that may be prolonged simply is changing into much more important.Скачать c .com zero

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Scalability issues—if the project grows big, then performance will be affected. • Not efficient when dealing with complex hierarchical result-sets. • Because they abstract data access operations, they are not very flexible and may present problems when dealing with customized data. A simple guestbook application for a personal website is one such case warranting the use of data controls. Such applications have quick turn-around time, and one can build a working application in a matter of few days.

NET Set the mode of the DataSourceMode property to DataReader instead of Dataset for better performance. The use of Data Source Controls can cut down the use of data access code and shorten the development time. In the above example, we inserted the data without writing any code. Similarly, we can perform updates, deletes, and other CRUD operations, and use data controls with other controls such as the GridView and the DetailsView. The Data Source Controls wrap the data access code logic, and use declarative markup in the ASPX page.

If we do not use Data Source Controls, then we can directly write custom data access code in the code-behind file. Although we will be putting non-UI related code in the UI layer even then, we will have more flexibility as we can write custom SQL statements and modify data at runtime, which is quite difficult to do using Data Source Controls. To overcome the disadvantages of data controls, Microsoft introduced Object Data Source control, to support business objects, and business logic code and the N-tier architecture.

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