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Essential ADO.NET by Bob Beauchemin

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9.3. A Brief Overview of ADO

Although the basic data access technology supplied by Microsoft for provider writers in the COM era is OLE DB, application programmers have been encouraged to adopt ADO in their programs. Before we look into migration paths, it is instructive to go over some of the basics of ADO.

ADO is a simplified version of (and an extra layer on top of) the OLE DB API. ADO is based on dual interfaces, making it usable by Visual Basic and ASP programmers as well as C++ programmers. The ADO Connection object encapsulates a combination of the OLE DB Data Source and OLE DB Session objects. The ADO Command object encapsulates OLE DB Command, and the ADO Recordset object encapsulates OLE DB Rowset. The ADO objects contain the corresponding ...

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