By Jason T. Roff
This ebook is a one-stop advisor to ADO, the common information entry resolution from Microsoft that enables easy accessibility to facts from a number of codecs and systems. It comprises chapters at the Connection, Recordset, box, and Command items and the homes assortment; ADO structure, facts shaping, and the ADO occasion version; short introductions to RDS, ADO.NET, and SQL; and a entire alphabetic connection with each ADO item, strategy, estate, and occasion.
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Extra resources for ADO ActiveX data objects
Close Set con = Nothing After running the previous code, the ConnectionString property of the implicitly created Connection object is printed to the Immediate window of the VB IDE. MDB; DriverId=25;FIL=MS Access;MaxBufferSize=2048;PageTimeout=5;" IT-SC book 61 By reading the ConnectionString property, you can determine what settings are being used when connecting to a data source. For instance, in the previous example, you could parse the String for MaxBufferSize and see that it was set to 2048.
A Connection object represents a unique physical connection to a data source.   For a complete list of the Connection object's methods, see Chapter 13. 1 Opening and Closing a Connection: Implicit Versus Explicit The Connection object is used to establish a unique physical connection to a given data source. This connection defines how you can obtain, interact with, and manipulate data from the specified source. While a Connection object is always required, you can choose whether to instantiate a connection explicitly or to allow ADO to create one implicitly on your behalf.
Example 41 relies on no other code to first establish a connection; the simple connection string DSN=BiblioDSN tells ADO that the table, Titles, is in the BiblioDSN data source. Some objects in ADO -- in particular, the Recordset and the Command objects -- do not require a pre-existing Connection object to operate. Both objects can read and write data 56 IT-SC book to a data source, and both need a physical connection to a data source to do so. But the Recordset and the Command objects can create their own Connection objects in the background with information that you supply.
ADO ActiveX data objects by Jason T. Roff