Read e-book online ADO.NET and ADO Examples and Best Practices for VB PDF

By William R. Vaughn

ISBN-10: 1430206713

ISBN-13: 9781430206712

ISBN-10: 1893115682

ISBN-13: 9781893115682

ADO.NET and ADO Examples and top Practices for VB Programmers, moment Edition brings the preferred first version modern with clean insights and tips about COM-based ADOand provides a voluminous part at the new ADO.NET expertise. Written particularly for COM-based ADO builders retooling for ADO.NET, this can be a developer's ebook, full of functional recommendation on tips to make code run speedier, but be more straightforward to write down and understand.

Veteran writer William Vaughn publications you thru the knowledge entry maze with working examples and various discussions of what works and what does not. Derived from years of expertise operating with facts entry builders, Vaughn's Best Practices are a suite of innovations confirmed to vastly decrease overhead, difficulties, and confusion—for the developer, the method, and the total crew. whereas a few are very simple to enforce, others require enormous wisdom and forethought to enable.

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NET, and other experimental software. It constructs an image ofyour base partition so you can easily create a "before" image before installing new software and revert to a working version if the install does not work. 0, ADO is already installed. However, your customer's system might not have ADO installed, and if it is installed, then the chances are pretty slim that their system is running the same version as your systems are. If you don't control what version your customer installs on their system, your ADO application might not work very long.

Isn't this supposed to bring in a smaller, lighter, more limited version ofADO? Well, at one time it did-but no longer. DLL that's used by all versions ofADO. Okay, so how do you create these objects in code? Connection 1. 24 ' This is the wrong way ... Guilty: I also used the Dim xx as New }Y syntax in early revisions of the Hitchhiker's Guide. When I discovered how this syntax impacted performance, I corrected them. Sorry 'bout that. Creating ADO Objects However, when you use this syntax, you cause Visual Basic to add measurable overhead to each and every reference to the object.

None ofthe code modules are 13 Chapter 1 registered and there is no test to see if there are more recent versions of the components already installed on the system. EXE, is copied to the target directory and loaded from there at run time. Yes, several copies of ADO might be installed on your disk along with other applications. Each of these versions of ADO can be different, or the same. When ADO is upgraded, these directories are left intact and do not automatically take advantage of bug fixes or enhancements-not until you recompile, retest, and redeploy your application.

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ADO.NET and ADO Examples and Best Practices for VB Programmers by William R. Vaughn

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