By Peter Wright
Designed to get programmers as much as specialist degrees as quickly as attainable, ADO.NET: From amateur to Pro is aimed toward builders who've very little .NET or ADO.NET adventure, in addition to programmers who're no longer but pleased with database programming. Best-selling writer Peter Wright painlessly strikes readers from uncomplicated database entry to the delicate manipulation of XML documents.
The ebook starts off through displaying you the fundamental structure of ADO.NET, after which offers you the instruments you will have to paintings with information prone and the relationship, Command, and DataSet items. Wright then drills down into the themes which are crucial for you as a certified developer to appreciate, together with transactions, concurrency, typed DataSets, and using XML with ADO.NET.
Through a variety of hands-on examples and dealing code that's adaptable to person tasks, you will the way to create quick and strong ADO.NET firm purposes. by means of the top of this publication, you possibly can paintings at a qualified point using Microsoft's strongest data-access technology.
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Additional resources for ADO.NET: From Novice to Pro, Visual Basic .NET Edition
Conversely, CloseO returns a connection to the connection pool. ADO. NET leaves it to you to control precisely how resources in the connection pool are used. " With a system managing thousands of connections to a resource as finite as a database, hanging connections can soon cause you untold problems. Always close your connections when you're done using them. NET is not as cumbersome as it may first appear. NET Framework (something that may still be a little unfamiliar to you if you come from a Visual Basic background) means that it's trivial to create your own Connection object that subclasses the SqlConnection object.
Some more advanced users like to drill down into data with a custom data analysis tool or custom reporting tool such as Crystal Reports. Views are the solution in this case. Since views are read-only, you don't run the risk of your users accidentally editing the data they retrieve, and views also allow you to expose data on a user-byuser or group-by-group basis. Accounting department users can see a view of orders tailored to them, for example, while the sales team has a more limited view showing just summary information on each customer and the orders that customer has placed.
You'll find out a lot more about transaction contexts later on in the book (Chapter 11 if you're in a hurry). At first, this may seem a pretty dumb way to work. After all, if all your applications connect to the same database the same way, then the chances are that all those applications will share the same connection pool. That's hardly useful when one of the applications is a Web application serving 3 million users for short connections, while another serves 10 users, each using multiple connections with long lifetimes.
ADO.NET: From Novice to Pro, Visual Basic .NET Edition by Peter Wright