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

By William R. Vaughn

ADO.NET and ADO Examples and most sensible Practices for VB Programmers, moment Edition brings the preferred first variation modern with clean insights and pointers on COM-based ADOand provides a voluminous part at the new ADO.NET expertise. Written particularly for COM-based ADO builders retooling for ADO.NET, it is a developer's ebook, jam-packed with sensible recommendation on easy methods to make code run swifter, but be more straightforward to jot down and understand.

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

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A Connection object represents a unique session with a data source. In the case of a client/ server database system, it may be equivalent to an actual network connection to the server. Depending on the functionality supported by the provider, some collections, methods, or properties of a Connection object might not be available. How can you tell which are available and which aren't? Again, check out the Properties collection after opening the Connection object. Using the collections, methods, and properties of a Connection object, you can do the following: • Specify an OLE DB provider with the Provider property.

6. The server you're trying to connect to does not speak named pipes-only sockets. You forgot that the target server is MSDE. 7. The Data Source Name you specified in the ConnectionString does not exist. You forgot to install it on every single system in the universe where your application runs. You're afraid to tell the users they have to run another setup step. 8. You chose the wrong provider for the database. 0 provider. 0 in the night-he's still mad about the connections crack. 9. You have been using the SA UseriD for all of your applications-just like all of the examples in all of the books-and the real SA just changed the password.

SS2K" refers to the local SQL Server 2000 instance. Connecting to Jet (Access) Databases Let's take a brieflook at the special issues involved in connecting to the native OLE DB provider for Jet databases. So you try to open a Jet database that has user accounts set up. You know that you have to provide a password and a Use riD to the provider, but your application gets the following message: "-2147217843 Cannot start your application. mdw file. " 40 Getting Connected Oh, swell. Microsoft expects developers to dig into the Registry to make sure that the database can be opened with a password.

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