ADO Programmer’s Reference by David Sussman

By David Sussman

All programmers operating in database expertise utilizing Microsoft improvement instruments will locate this publication worthwhile. As a reference, it's compatible for rookies and skilled programmers alike. this can be a welcome addition and supplement to the other ADO handbook, and its one you should carry on the table in any respect times.

This informative advisor offers an entire connection with the ADO API, protecting all models as much as 2.8. Code samples are concise, and emphasis is put on ADO recommendations instead of the categorical environments during which it can be used. a number of the book's highlights include:

  • Coverage of comparable applied sciences, reminiscent of ADOX and ADOMD
  • Online samples in a number of languages
  • Examination of ADO functionality elements

This is the main definitive booklet at the topic thus far, and has been the top reference on ADO considering the fact that its first release.

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These are just the defaults supplied, some of which may not appear, depending upon your installation options. For example, Index Server does not act as a remote provider, and you can connect to only local Index Servers. Therefore, if you do not have Index Server on your machine, the MSIDXS may not be installed. 8 install. You can find out which providers are available on your system by creating a new Data Link. This is similar to an ODBC DSN, but for OLE DB connections. By using Windows Explorer, you can create one in any directory simply by right-clicking (or selecting the File menu), picking New, and selecting Microsoft Data Link.

Or an ODBC File DSN. provider~MSDASQL;DSN~data_source_name; UID=user_id; PWD=user-password For a DSN-Iess connection, the connection string varies with the database you are connecting to. It follows the same conventions as an ODBC connection string; in the Control Panel, you can see the parameters in the ODBC applet. One important option is the same for all ODBC connections, because it specifies the ODBC driver to use: Provider~MSDASQL;Driver= The name of the driver specified in the Driver attribute of the connection string will be one of those shown on the Drivers tab of the ODBC Control Panel applet.

For example, imagine that you need to store details from a questionnaire. Append 'Comments', adVarChar, 255, adFldFixed The good thing about this method is that you can save the contents of this disconnected recordset to a file, and you can use it as a parameter for functions in business objects Oust like recordsets obtained from OLE DB Providers). The EflOI Object and the EflOIS Collection An Error object contains details of a single error (or warning) returned from a data provider. Details include a description of the error, an error number, and the source object that raised the error.

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