By David Sussman
All programmers operating in database expertise utilizing Microsoft improvement instruments will locate this e-book priceless. As a reference, it's compatible for rookies and skilled programmers alike. this can be a welcome addition and supplement to the other ADO guide, and its one you should carry on the table in any respect times.
This informative consultant presents an entire connection with the ADO API, overlaying all types as much as 2.8. Code samples are concise, and emphasis is put on ADO concepts instead of the explicit environments during which it can be used. many of the book's highlights include:
- Coverage of comparable applied sciences, comparable to ADOX and ADOMD
- Online samples in a number of languages
- Examination of ADO functionality elements
This is the main definitive ebook at the topic thus far, and has been the major reference on ADO seeing that its first release.
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Additional info for ADO Programmer’s Reference
This means that instead of being instantiated when declared, the object is instantiated later in the code-which can lead to debugging problems. Recordset This creates a variable of the type Recordset, and then the Set line instantiates the object. Recordset') After an object has been created, invoking the methods and properties is extremely simple. For example: objRs . Cursorlocation = adUseClient objRs . Open 'authors', objConn, adOpenStatic, _ adLockBatchOptimistic, adCmdTable The ad constants are automatically available to you in Visual Basic once you have referenced the ADO library (as described previously).
Although you might think this breaks the flexibility of the object model, it gives a central place to find error information. Because the Recordset and Command objects have a connection underneath, it is extremely simple to access this error information without creating a Connection object. The Command Object The Command object is designed to run SQL statements (assuming the provider supports the Command object), especially those that require parameters. This is an important point, because the use of stored queries and procedures is a great way to improve speed and segment your application, and it fits naturally with Windows DNA.
Views Print objView . Name Next Like the Procedure object, the View object also supports an ADO Command as a property. Command Set objCmd = objCat. name") . CommandText This object and collection is also provider-dependent. 37 Chapter 2 The Property Object and the Properties Collection The Property object and Properties collection are identical to their ADODB equivalents. ADOX Supported Features ADOX is not supported by all providers, including those supplied by Microsoft. Currently, only the OLE DB Provider for MicrosoftJet fully supports ADOX.
ADO Programmer’s Reference by David Sussman