April 2003
Beginner to intermediate
620 pages
21h 48m
English
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Chapter 21. The DataReader Class
The DataReader object
represents a read-only, forward-only stream of data, which is ideal
for quickly retrieving query results. The
DataReader is useful if you don’t
need the full support for versioning and change tracking provided by
the DataSet. Best of all, because the
DataReader loads only a single row into memory at
a time, it has a small in-memory footprint.
You can’t create a DataReader
directly. Instead, you must use the ExecuteReader( )
method of a Command object that returns a
DataReader. Chapter 5 presents
complete examples that show how to use the
DataReader in various scenarios.
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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.