Visual Basic 2015 Unleashed

Understanding Connections and Data Readers

To establish a connection to a database, you need to create an instance of the SqlConnection class by passing the connection string as an argument. Then you invoke the Open method to open the connection so you can perform your data operations. Finally, you invoke Close to close the connection. The following code, which requires an Imports System.Data.SqlClient directive, demonstrates how you establish a connection to the Northwind database:

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Using myConnection As New  _      SqlConnection("Data Source=SERVERNAME\SQLEXPRESS;Initial Catalog=Northwind;" &"Integrated Security=True;MultipleActiveResultSets=True")      myConnection.Open()End Using

Utilizing a Using..End Using