Download ADO ActiveX data objects by Jason T. Roff PDF

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By Jason T. Roff

This booklet is a one-stop consultant to ADO, the common info entry resolution from Microsoft that permits easy accessibility to info from a number of codecs and systems. It contains chapters at the Connection, Recordset, box, and Command gadgets and the homes assortment; ADO structure, facts shaping, and the ADO occasion version; short introductions to RDS, ADO.NET, and SQL; and a finished alphabetic connection with each ADO item, process, estate, and occasion.

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ADO ActiveX data objects

This e-book is a one-stop advisor to ADO, the common information entry answer from Microsoft that enables quick access to information from a number of codecs and structures. It contains chapters at the Connection, Recordset, box, and Command gadgets and the houses assortment; ADO structure, info shaping, and the ADO occasion version; short introductions to RDS, ADO.

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As a matter of fact, when using a client-side Connection object, you can use only the Remote Provider and Remote Server arguments. URL IT-SC book 59 Used to specify a resource, such as a file or a directory, as the data source. 01). The ConnectionString is a public property of the Connection object that is set before the connection is opened. 1). Because it is the default provider, you don't necessarily have to name it in the ConnectionString. 1; Data Source=WidgetsDSN; User ID=BigBear; Password=1810;" and: "Data Source=WidgetsDSN; User ID=BigBear; Password=1810;" Example 4-3 shows the ways in which we can use the ConnectionString when we open the Connection object.

This collection and object combination defines the characteristics of parameters when referring to a parameterized query or defines the input and output arguments when referring to a stored procedure. Figure 2-3. The Parameters collection and the Parameter object's object model With the Parameter object, you can set or read the name, value, and characteristics of a given parameter. If you know this information beforehand for any stored procedure or parameterized query, you can potentially save valuable time by creating Parameter objects yourself that ADO would otherwise spend trying to learn this information.

Recordset If you know for a fact that no other class library listed in the References dialog box of your current Visual Basic application has the same class names as ADO, you may remove the ADODB prefix when declaring and instantiating object variables. However, if you are using more than one object model with the same class definitions (as in the previous example), not specifying the library from which the class should be derived tells VB to instantiate the class from the library that comes first in the list of references to the project.

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