Titlebook: Expert VB 2008 Business Objects; Rockford Lhotka,Joe Fallon Book 2009 Joe Fallon and Rockford Lhotka 2009 Scala.Web Services.class.managem

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Fronto- und laterobasale DuraläsionChapters 17 and 18 focused on creating business objects and enabling them with data access. The business objects, and the business logic they contain, are the centerpieces of any application, and those objects make the behaviors defined in your use cases (from Chapter 3) available for use when building applications.

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消散

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Property Declarations,Chapter 6 introduced the idea of the Property Info(Of T) class from the Csla namespace. This type allows a business object to declare metadata about the object’s properties, and most importantly, it helps eliminate the use of a String literal to reference the property name throughout the business class.

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Object Status Management,The next topic I’ll discuss in the implementation of CSLA .NET is how editable objects manage status information. Editable business objects maintain a set of consistent status information. The management of these values is mostly automated by BusinessBase, BusinessListBase, and the data portal.

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Parent-Child Relationships,In Chapter 6, I started walking through the framework implementation. Chapter 7 covers how to declare properties, including properties that reference child objects, and Chapter 8 focuses on how object status values are tracked, including some interaction with child objects.

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Data Binding,Data binding is a powerful concept that is supported by WPF, Windows Forms, and Web Forms. It is a Microsoft technology that provides an abstract and formal communication layer between the user interface and the business objects, or between the Interface Control layer and Business layer, to use the terms from Chapter. 1.

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Business and Validation Rules,I’ve now walked through several aspects of the CSLA.NET implementation, including an overview of the framework, base classes, property declarations, object status management, parent-child relationships, and data binding.

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