June 2001
Intermediate to advanced
320 pages
8h 32m
English
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Content Components
Content components encapsulate data. In previous ADO versions, the Recordset object represented such a component. The data contained by the recordset component is in the form of a table, consisting of columns and rows. In ADO.NET, the data encapsulated by the DataSet component is in the form of a relational database, consisting of tables and relationships. This is a major improvement in data-access technology. In this section, we provide a high-level survey of the core classes that make up the content components, including DataSet, DataTable, DataColumn, DataRow, DataView, and DataRelation.[35]
DataSet
If you are familiar with ADO, you know that data transfers between components are a recordset . The recordset contains data in a tabular form. Whether the recordset includes information from one or many tables in the database, the data is still returned in the form of rows and columns as if they were from a single table. ADO.NET allows for more than just a recordset to be shared between application components. This is one of the most important features of ADO.NET: we will be transferring a DataSet instead of a recordset.
The DataSet can be viewed as an in-memory view of the database. It can contain multiple DataTable and DataRelation objects. With previous versions of ADO, the closest you could get to this functionality was to exchange data with a chain of Recordset objects. When the client application receives this chained recordset, it can get to each of the ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.