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This chapter shows the practical use of the DataSet and DataAdapter classes that are utilized to interact with the database. It is recommended that you read Chapters 2 and 3 before reading this chapter. Through the use of a simple case study, you will learn how to work with data access components, to work with XML, and to build Web Services. This chapter will demonstrate how to retrieve data from the database to a DataSet. In Chapter 7, you will learn how to update changes from a DataSet to the database.
Chapter 7 will use the Web Service we build in this chapter and continue with the case study. In this chapter, we will only look at the Web Service aspect of the case study. We will look at the clients in Chapter 7. We will also concentrate more on the data service side of things. We will not go into the details of security and maintaining user sessions, as they have little bearing on the database interaction. Instead, we will concentrate on the functions and methods that the service will expose for manipulating data from the Northwind database.
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