By Jason T. Roff
This publication is a one-stop advisor to ADO, the common info entry resolution from Microsoft that enables easy accessibility to info from a number of codecs and structures. It contains chapters at the Connection, Recordset, box, and Command gadgets and the homes assortment; ADO structure, information shaping, and the ADO occasion version; short introductions to RDS, ADO.NET, and SQL; and a entire alphabetic connection with each ADO item, approach, estate, and occasion.
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Additional resources for ADO ActiveX data objects
Asp extension that is located in an IIS virtual directory. mdb file resides in the C:\Program Files\Microsoft Visual Studio\VB98 directory or that the directory entered in the ASP source matches the location of the Access database file. Example 3-5. 6 Summary This chapter has explained how to access and use ActiveX Data Objects with the five most commonly used Microsoft development languages: Visual Basic, Visual C++, Visual J++, VBScript, and JScript. The following is a list of key points: Visual Basic is an easy language with which to develop ActiveX Data Object applications due to its minimal setup.
A parameterized query (a query with input and output parameters) A parameterized query uses variables that set or return values that are part of a particular query or SQL statement. A stored procedure from within the current data source A stored procedure is a query that resides within the connected data source. By identifying the name of a stored procedure, you can execute, through the data provider, a query that is defined outside of ADO. Stored procedures can also use parameters. A statement to open a single table An open table-type statement does not query data, but instead returns all of the fields in all of the records belonging to the specified table.
If your particular data provider needs additional information, this information can be passed from the Connection object directly to your data provider. By allowing this form of pass-through of connection specifications, ADO does not make any assumptions or restrict itself to one type of data source. All of the functionality of the chosen data provider is made available through the use of the Connection object. A Connection object is used to accomplish the following tasks: Select a data source and data provider Open and close a connection on a selected data source Manage transactions on a data source Execute queries on a data source Connection objects can be created explicitly and used later with the Command and Recordset objects, or the Connection object can be created by the Command and Recordset objects implicitly, behind the scenes.
ADO ActiveX data objects by Jason T. Roff