ADO.NET is Microsoft's database-independent, language-neutral data access interface included within the .NET framework. ADO.NET allows .NET languages such as C# and VB.NET to communicate with various data sources, primarily relational databases such as SQL Server, Oracle, and, of course, MySQL. MySQL provides an ADO-compliant driver—Connector/Net—that allows us to work with MySQL databases using the ADO.NET interfaces.
First, we'll start with a quick review of how we can use ADO.NET to process standard SQL statements against a MySQL database. Next, we'll examine the ADO.NET syntax for invoking stored programs, including handling input and output parameters and processing multiple result sets. Finally, we'll show how we can use a MySQL stored procedure as the basis for an ASP.NET web application.
Before looking at how to invoke stored programs using ADO.NET, let's review how we perform operations in ADO.NET involving simple SQL statements. These operations form the foundation of stored program interactions. If you are already familiar with using ADO.NET with MySQL, you might want to skip forward to "Using Stored Programs in ADO.NET," later in this chapter.
To connect to MySQL from ADO.NET, we first need to download and install the Connector/Net provider from MySQL. We can download the Connector/Net driver from the MySQL web site at http://dev.mysql.com/downloads/connector/net/ ...