Section 18.11. Wrap-Up


18.11. Wrap-Up

In this chapter, you learned how to use file processing to manipulate persistent data. You learned that data is stored in computers as 0s and 1s, and that combinations of these values are used to form bytes, fields, records and eventually files. We overviewed the differences between character-based and byte-based streams, as well as several file-processing classes from the System.IO namespace. You used class File to manipulate files and class Directory to manipulate directories. Next, you learned how to use sequential-access file processing to manipulate records in text files. We then discussed the differences between text-file processing and object serialization, and used serialization to store entire objects in and retrieve entire objects from files.

In Chapter 19, Extensible Markup Language (XML), we present Extensible Markup Language (XML)a widely supported technology for describing data. Using XML, we can describe any type of data, such as mathematical formulas, music and financial reports. We demonstrate how to describe data with XML and how to write programs that can process XML encoded data. XML is having an important impact on the development of Web applications, which we discuss in detail in Chapters 21 and 22.



Visual BasicR 2005 for Programmers. DeitelR Developer Series
Visual Basic 2005 for Programmers (2nd Edition)
ISBN: 013225140X
EAN: 2147483647
Year: 2004
Pages: 435

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