By Scott Klein
Formerly, SQL builders were capable of nearly totally forget about the SQLCLR and deal with it as a peripheral technology—almost an extension to the most product. With the appearance of LINQ and the Entity Framework, this is often not the case, and the SQLCLR is relocating to the guts degree. It’s a strong product yet, for lots of, it truly is a completely new method of operating with facts. seasoned Entity Framework 4.0 might help readers comprehend the results of the Entity Framework and the way it may be used to alter their improvement practices and make their databases extra strong and versatile. on account that many readers can be encountering this topic for the 1st time, the publication will create an inclusive setting within which the recommendations of .NET improvement are approached from the point of view of the Relational T–SQL developer to foster a feeling of shared–ownership in accordance with Microsoft’s most recent most sensible practices.* entire insurance of the hot better and tougher integration with .NET 3.5* Written from a real–world viewpoint and examines the good points provided by way of LINQ and the Entity Framework that would support remedy difficulties skilled through specialist builders* comprises perception, interpretation, research, and evangelism rather than simply simple truth [
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Figure 3-2 shows the different components, including the following: • Designer surface: A visual surface for creating and modifying the conceptual model. • Mapping Details window: The location where mappings are created or modified. The window is discussed later in the chapter. • Toolbox: Contains controls that can be used to create entities, associations, and inheritance relationships. • Model Browser window: Provides a view of the conceptual model and the associated storage model. edmx). The information in this window is organized by the type of information contained within the window, as shown in Figure 3-2.
Within this window you can change the individual property mappings or assign imported stored procedures as functions to perform Insert, Update, and Delete operations. With an understanding of the different windows in the Designer, let’s move on and discuss the different components in the EDM Designer itself. Entities To understand the Entity Framework and how entities work, there are a few concepts that you should know: 38 • Entity type: This represents a particular type of data, such as Employee, Order, or Product.
You can also set a default value, specify whether it can be nullified, and change its data type. Additional properties can be added by right-clicking on the Entity itself and selecting Add ➤ Scalar Property or Complex Property, as shown in Figure 2-12. Figure 2-12. Adding a scalar property You should also notice in Figure 2-12 a new Add menu option, called Complex Property. A complex property (or type) is a non-scalar property of entity types that facilitates the organization of scalar properties within entities.
Pro Entity Framework 4.0 by Scott Klein