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However, anytime a new layer of abstraction is added on top of another, it permits developers to forgo education on the lower layers of abstraction.And this works well until something goes awry, and one layer of abstraction "leaks" into another.Finally, after exhausting the data, a closing table tag would complete the code.If you've never had to write classic ASP code consider yourself lucky - it was inherently messy, especially when applying more involved formatting, such as having alternating row colors or formatting cells based on various conditions. NET 1.x removed the expanse of code needed to be written.These controls allow page developers to declaratively access and modify data without writing any code to perform the data access. ) When I started my career as a web developer, Microsoft's Active Server Pages version 2.0 had just burst onto the scenes (classic ASP, mind you, not . Back in my day, web developers were responsible for writing code to both access and display data.This article is one in a series of articles on ASP. That is, we had to write code that queried the database and then had to write more code to squirt out the appropriate data surrounded by the applicable HTML elements. NET version 1.x simplified this process with the host of data Web controls (the Data Grid, Data List, Repeater, Drop Down List, and so on). NET 2.0 data source controls provide a declarative way to work with data.At this point developers only familiar with the data source controls and not their underlying architecture will be immobile.I am not saying don't learn about and use the data source controls, nor am I saying that the days of not having to understand how to access data programmatically are nigh.
NET 2.0 introduced a number of new Web controls designed for accessing and modifying data.On one hand this is a good things as it opens the development space to those who might not have a web-based background.Furthermore, it allows for projects to be turned around quicker, since the developers need not focus their time and energy researching what are now becoming esoteric topics.Regardless of how the data source controls begin to differentiate, the data Web controls in an ASP.NET page use all five different data source controls in the same manner, as we will see shortly.While the data source controls are easy to get started with, there are a number of subtleties and issues that can cause headaches.In this article series we'll examine the five built-in data source controls in detail.While libraries like the Data Access Application Block help abstract away the repetition, and utilizing a well-designed application architecture helps reduce the required domain knowledge for the website's implementors, the data access techniques in ASP.NET 1.x still feel much like displaying data in classic ASP applications. NET 2.0 were introduced to bring the advantages from the data display side over to the data access side as well. NET 2.0 provides five different data source controls, each designed for accessing a different type of data.This first part, however, examines the concepts shared among all five data source controls and how ASP. NET version 1.x's biggest improvements over its precursor, classic ASP, was the data Web controls had the ability to render HTML markup from an arbitrary data source without having to write a lick of code.NET 2.0's data Web controls work with their associated data source controls at runtime. This enhancement introduced two advantages: it saved having to write a lot of code and markup, and required less domain expertise from developers.