June 2006
Intermediate to advanced
1344 pages
42h 52m
English
book
Visual Basic 2005 for Programmers: Deitel Developer Series, Second Edition
by Paul J. Deitel - Deitel & Associates, Inc., Harvey M. Deitel - Deitel & Associates, Inc.
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18.1. Introduction
Variables and arrays offer only temporary storage of data—the data is lost when a local variable “goes out of scope” or when the program terminates. By contrast, files (and databases, which we cover in Chapter 20, Database, SQL and ADO.NET) are used for long-term retention of large amounts of data, even after the program that created the data terminates. Data maintained in files is often called persistent data. Computers store files on secondary storage devices, such as magnetic disks, optical disks and magnetic tapes. In this chapter, we explain how to create, update and process data files.
We begin with an overview of the data hierarchy from bits to files. Next, we overview some of the FCL’s file-processing classes. We then ...
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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.