23.1. Why Use Components?
To master ASP.NET development you need to become a skilled user of the .NET class library. So far, you've learned how to use .NET components designed for reading files, communicating with databases, calling web services, and storing information about the user. Though these class library ingredients are powerful, they aren't customizable, which is both an advantage and a weakness.
For example, if you want to retrieve data from a SQL Server database, you need to weave database details (such as SQL queries) directly into your code-behind class or (if you're using the SqlDataSource) into the .aspx markup portion of your web page file. Either way if the structure of the database changes even slightly, you could be left with ...
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