By Joe Fallon, Rockford Lhotka
ISBN-10: 1430216387
ISBN-13: 9781430216384
Do you need to create .NET purposes that offer excessive functionality and scalability? do you need to hire item - orientated programming concepts in a dispensed surroundings? do you need to maximise the reuse and maintainability of your code? Then this e-book is for you. In Rockford Lhotka's specialist VB 2008 company gadgets, you are going to tips on how to use complicated .NET Framework functions along object-oriented layout and programming to create scalable, maintainable object-oriented functions. larger nonetheless, this e-book contains Component-based Scalable Logical structure (CSLA) .NET 3.6, a widely-used framework on that you would be able to base your program improvement. through the use of the innovations and framework within the ebook, you could concentration extra in your company matters, and not more on know-how.
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Extra info for Expert VB 2008 Business Objects
Example text
Figure 1-11. info 21 22 CHAPTER 1 ■ DIS TRIBUTED ARC HITE CTURE Unfortunately, in practice, the business logic ends up being scattered throughout the application, thereby decreasing readability and making maintenance more difficult. Even more important, business logic in one form or page isn’t reusable when subsequent forms or pages are created that use the same data. Furthermore, in a web environment, this architecture also leads to a totally noninteractive user experience, because no validation can occur in the browser.
Because of this, the architecture and framework will merely support the creation of varied interfaces, not automate their creation. Instead, the focus will be on simplifying the other layers in the architecture, for which technology is more stable. Interface Control Now that I’ve addressed the distinction between the Interface and the Interface Control layers, the latter’s purpose is probably fairly clear. info C HAPTE R 1 ■ DISTRIBUTED A RCHITEC TURE navigation paths, and how to interpret user input.
To support non-interactive processes, on the other hand, the Business layer often needs to be deployed onto an application server, or as close to the database server as possible. For instance, the calculation of an insurance rate can involve extensive database lookups along with quite a bit of complex business processing. This is the kind of thing that should occur behind the scenes on a server, not on a user’s desktop. Fortunately, it is possible to deploy a logical layer on multiple physical tiers.
Expert VB 2008 Business Objects by Joe Fallon, Rockford Lhotka
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