zxing pdf417 c# CH A PT ER 4 C SLA .NET O BJECT S TER EOT YPES in C#.NET

Maker PDF-417 2d barcode in C#.NET CH A PT ER 4 C SLA .NET O BJECT S TER EOT YPES

CH A PT ER 4 C SLA .NET O BJECT S TER EOT YPES
PDF-417 2d Barcode Creation In Visual C#.NET
Using Barcode encoder for VS .NET Control to generate, create PDF 417 image in .NET applications.
www.OnBarcode.com
Scan PDF 417 In Visual C#.NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Figure 4-2. Object graph illustrating containment A common example of containment is a sales order, which contains a list of line item objects. Typically the SalesOrder object is a root and a parent; the LineItemList object is a child and a parent; and each LineItem object is a child. It is also possible for a list to be a root, as shown in Figure 4-3.
Create EAN13 In Visual C#.NET
Using Barcode generator for .NET Control to generate, create UPC - 13 image in .NET framework applications.
www.OnBarcode.com
Encoding Data Matrix In C#
Using Barcode drawer for .NET framework Control to generate, create Data Matrix 2d barcode image in .NET applications.
www.OnBarcode.com
Figure 4-3. Object graph with a root list object Another important object-oriented concept is the using relationship, where one object uses or interacts with another object but does not contain that object. This is a fundamentally different type of relationship, but it is quite common to accidentally confuse a using relationship with containment. For example, the previously mentioned SalesOrder object might use a CustomerInfo object, but it makes no sense to think that a sales order contains or owns a customer, even though it may require information from a customer information object. Figure 4-4 illustrates how a using relationship can exist between two root objects.
Linear Barcode Encoder In C#
Using Barcode printer for .NET Control to generate, create Linear 1D Barcode image in .NET applications.
www.OnBarcode.com
Generate Barcode In Visual C#
Using Barcode creator for .NET framework Control to generate, create Barcode image in VS .NET applications.
www.OnBarcode.com
CHAPTER 4 CSLA . NET OBJECT STEREOTYPES
Printing Barcode In C#
Using Barcode drawer for .NET framework Control to generate, create Barcode image in VS .NET applications.
www.OnBarcode.com
Print USD8 In Visual C#
Using Barcode generation for .NET Control to generate, create USD8 image in .NET applications.
www.OnBarcode.com
Figure 4-4. A using relationship between two objects There are many variations on the using relationship, including a root using a child, a child using a root, or a child using another child. But the key to understanding the using relationship is to remember that neither object owns or contains or controls the other object. Editing or saving one object does not edit or save the other object. This is fundamentally different from containment, where each parent owns its children and controls their lifetimes, and ultimately the root object owns all the objects in the object graph and their lifetimes are determined by the root object. By combining these various concepts you can see how the stereotypes fit together. Table 4-2 lists the stereotypes and provides a definition for each. Additionally, the table lists the CSLA .NET base class you will inherit from to implement each stereotype.
Recognizing PDF-417 2d Barcode In Visual Studio .NET
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
PDF 417 Scanner In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Table 4-2. CSLA .NET Object Stereotypes
Making Barcode In Java
Using Barcode generator for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
Data Matrix ECC200 Generator In Java
Using Barcode generator for BIRT Control to generate, create Data Matrix 2d barcode image in BIRT reports applications.
www.OnBarcode.com
Stereotype
UPC-A Supplement 2 Drawer In None
Using Barcode creator for Microsoft Word Control to generate, create UPC-A image in Office Word applications.
www.OnBarcode.com
Encoding Code 39 Full ASCII In Java
Using Barcode encoder for Android Control to generate, create Code-39 image in Android applications.
www.OnBarcode.com
Editable root object Editable child object Switchable object
Encoding Barcode In None
Using Barcode creator for Office Excel Control to generate, create Barcode image in Excel applications.
www.OnBarcode.com
Barcode Maker In None
Using Barcode encoder for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
Acronym
PDF417 Drawer In Java
Using Barcode generation for Java Control to generate, create PDF 417 image in Java applications.
www.OnBarcode.com
Draw Barcode In Objective-C
Using Barcode generator for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
ER EC None
Generate Code 128 Code Set C In Java
Using Barcode generator for BIRT reports Control to generate, create Code 128C image in Eclipse BIRT applications.
www.OnBarcode.com
Reading UPC Code In C#
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Base Class
BusinessBase BusinessBase BusinessBase
Definition
A root object with readwrite properties A child object with readwrite properties A specialized editable object that can act as a root or child depending on how it is created A root list containing editable child objects A child list containing editable child objects A root object with read-only properties A child object with readonly properties A root list containing readonly child objects A child list containing readonly child objects A specialized read-only root list containing name/value read-only child objects A root object capable of executing code on the client, then the application server, then the client
Editable root list Editable child list Read-only root object Read-only child object Read-only root list Read-only child list Name/value list
ERL ECL ROR ROC RORL ROCL NVL
BusinessListBase BusinessListBase ReadOnlyBase ReadOnlyBase ReadOnlyListBase ReadOnlyListBase NameValueListBase
Command object
None
CommandBase
CH A PT ER 4 C SLA .NET O BJECT S TER EOT YPES
Table 4-2. CSLA .NET Object Stereotypes
Stereotype
Dynamic editable root
Acronym
None
Base Class
BusinessBase
Definition
A specialized editable root object that is retrieved as a child of a dynamic editable list but is saved individually A specialized root list containing editable dynamic editable root objects, which are retrieved as a group but are saved individually An object that contains criteria or key information necessary to identify and create, retrieve, or delete another object
Dynamic editable list
ERLB
EditableRootListBase
Criteria
None
CriteriaBase
By combining objects based on these stereotypes in various ways, it is possible to meet the needs of most business application use cases by using the object-oriented design techniques discussed in 3.
Business Object Life Cycle
Before getting into the code structure for the business objects, it s worth spending some time to understand the life cycle of those objects. By life cycle, I mean the sequence of methods and events that occur as the object is created and used. Although it isn t always possible to predict the business properties and methods that might exist on an object, there s a set of steps that occur during the lifetime of every business object. Typically, an object is created by UI code, whether that s WPF, Windows Forms, Web Forms, a WCF service, or a Windows Workflow Foundation activity. Sometimes an object may be created by another object, which will happen when there s a using relationship between objects, for instance.
Copyright © OnBarcode.com . All rights reserved.