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

By William R. Vaughn

ADO.NET and ADO Examples and most sensible Practices for VB Programmers, moment Edition brings the preferred first version modern with clean insights and pointers on COM-based ADOand provides a voluminous part at the new ADO.NET know-how. Written in particular for COM-based ADO builders retooling for ADO.NET, this can be a developer's e-book, jam-packed with functional recommendation on how one can make code run quicker, but be more uncomplicated to put in writing and understand.

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

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Although these objects won't help your social life, they will help you get in touch with your data. Frankly, based on the number of questions generated in my classes and the length of time the connection labs consume, getting connected (to databases) seems to be quite daunting for some people--and not just for those getting started with ADO. For example, there seems to be quite a bit of confusion regarding the ConnectionString property and how to construct it correctly (and efficiently). I discuss a few tips and tricks in this regard as I go.

Dll Standard Figure 3-1. The Visual Basic IDE Project/References dialog box. x Library"? 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.

Well, Windows 2000 technology was supposed to come to the rescue. In an old edition of MSDN News, 2 there was an informative article that made me think the problem was at least being studied. The article, "The End ofDLL Hell," suggests that the new Windows Installer technology and Windows File Protection will prevent accidental (or intentional) damage to DLLs. What it does not say is whether ADO is considered to be one of the specially protected system D LLs. At this point there's evidence it's not-but this might have to change.

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