March 2008
Intermediate to advanced
982 pages
22h 43m
English
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Chapter 2. Working with Disconnected Data Objects
2.0. Introduction
ADO.NET has both connected and disconnected classes. Connected classes let you retrieve and update data in underlying data sources. They include the Connection, Command, DataReader, and DataAdapter classes. Each data provider is responsible for implementing the connected classes. Disconnected classes let you access and manipulate offline the data you retrieved using the connected classes and later synchronize it with the underlying data source using the connected classes. The disconnected classes include the DataSet, DataTable, DataColumn, DataRow, DataView, DataRelation, and Constraint classes. The disconnected classes are part of the ADO.NET classes in the .NET Framework. The recipes in this chapter discuss creating, working with, and managing the ADO.NET disconnected objects.
The DataSet is a disconnected, in-memory relational database that provides sophisticated navigational capabilities. It acts as a container for other objects, including DataTable, DataColumn, DataRow, and DataRelation. You can work with the data in these objects programmatically or you can data bind DataSet and DataTable objects to a variety of Windows Forms and Web Forms controls.
The DataSet and DataTable objects are data source-independent. Within these objects, .NET Framework data types are used to define column data types within tables. These data types are not the same as .NET provider native data types—provider data types are mapped to ...
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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.
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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.