pdf417 c# Note in C#.NET

Making PDF417 in C#.NET Note

Note
Encoding PDF-417 2d Barcode In Visual C#
Using Barcode generation for .NET Control to generate, create PDF 417 image in .NET applications.
www.OnBarcode.com
Scan PDF-417 2d Barcode In Visual C#
Using Barcode reader for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Throughout this book, it is assumed that you are building business applications, in which case almost all objects are ultimately stored in the database at one time or another. Even if an object isn t persisted to a database, you can still use BusinessBase to gain access to the n-level undo and business, validation, and authorization rules and change tracking features built into the framework.
Barcode Creation In C#
Using Barcode encoder for .NET framework Control to generate, create Barcode image in VS .NET applications.
www.OnBarcode.com
UPC Code Creation In C#.NET
Using Barcode generator for .NET Control to generate, create Universal Product Code version A image in .NET framework applications.
www.OnBarcode.com
For example, an InvoiceEdit is typically a root object, though the LineItem objects contained by an InvoiceEdit object are child objects. It makes perfect sense to retrieve or update an InvoiceEdit, but it makes no sense to create, retrieve, or update a LineItem without having an associated InvoiceEdit. The BusinessBase class provides default implementations of the data access methods that exist on all root business objects.
Barcode Generator In Visual C#.NET
Using Barcode maker for Visual Studio .NET Control to generate, create Barcode image in VS .NET applications.
www.OnBarcode.com
Generating EAN-13 In Visual C#
Using Barcode generator for .NET framework Control to generate, create European Article Number 13 image in VS .NET applications.
www.OnBarcode.com
Note
Encoding Code 39 In Visual C#.NET
Using Barcode maker for VS .NET Control to generate, create Code 3/9 image in Visual Studio .NET applications.
www.OnBarcode.com
Encode Planet In Visual C#
Using Barcode drawer for .NET framework Control to generate, create USPS Confirm Service Barcode image in .NET framework applications.
www.OnBarcode.com
The default implementations are a holdover from a very early version of the framework. They still exist to preserve backward compatibility to support users who have been using CSLA .NET for many years and over many versions.
Generate PDF417 In None
Using Barcode creation for Microsoft Word Control to generate, create PDF417 image in Word applications.
www.OnBarcode.com
PDF417 Encoder In C#.NET
Using Barcode printer for .NET framework Control to generate, create PDF 417 image in .NET framework applications.
www.OnBarcode.com
C HAPTE R 2 FRA MEWORK DES IGN
Paint EAN-13 In .NET Framework
Using Barcode creation for .NET Control to generate, create UPC - 13 image in VS .NET applications.
www.OnBarcode.com
QR-Code Reader In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
These methods will be called by the data portal mechanism. These default implementations all raise an error if they re called. The intention is that the business objects can opt to override these methods if they need to support, create, fetch, insert, update, or delete operations. The names of these methods are as follows: DataPortal_Create() DataPortal_Fetch() DataPortal_Insert() DataPortal_Update() DataPortal_DeleteSelf() DataPortal_Delete() Though virtual implementations of these methods are in the base class, developers will typically implement strongly typed versions of DataPortal_Create(), DataPortal_Fetch(), and DataPortal_ Delete(), as they all accept a criteria object as a parameter. The virtual methods declare this parameter as type object, of course; but a business object will typically want to use the actual data type of the criteria object itself. This is discussed in more detail in s 15 and 18. The data portal also supports three other (optional) methods for pre- and post-processing and exception handling. The names of these methods are as follows: DataPortal_OnDataPortalInvoke() DataPortal_OnDataPortalInvokeComplete() DataPortal_OnDataPortalException() Editable root objects are very common in most business applications.
Creating QR Code In Objective-C
Using Barcode creator for iPhone Control to generate, create QR Code 2d barcode image in iPhone applications.
www.OnBarcode.com
USS Code 39 Reader In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Editable Child
Code 39 Extended Creator In VS .NET
Using Barcode maker for ASP.NET Control to generate, create Code 39 Full ASCII image in ASP.NET applications.
www.OnBarcode.com
Barcode Generator In Java
Using Barcode maker for Java Control to generate, create Barcode image in Java applications.
www.OnBarcode.com
Editable child objects are always contained within another object and they cannot be directly retrieved or stored in the database. Ultimately there s always a single editable root object that is retrieved or stored. BusinessBase includes a method that can be called to indicate that the object is a child object: MarkAsChild(). Normally this method is invoked automatically by CSLA .NET as the object instance is created by the data portal. This means that a child object might look like this: [Serializable] public class Child : BusinessBase<Child> { } Notice that there s no different from the previous root object. If for some reason you do not use the data portal (discussed later in the Data Portal section) to create instances of your objects, you may need to call MarkAsChild() manually in the object s constructor: [Serializable] public class Child : BusinessBase<Child> { private Child() { MarkAsChild(); } }
Drawing Barcode In .NET
Using Barcode generator for ASP.NET Control to generate, create Barcode image in ASP.NET applications.
www.OnBarcode.com
EAN-13 Reader In C#.NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
CHAPTER 2 FRAMEWORK DE SIGN
Paint Code 3/9 In Visual Basic .NET
Using Barcode creator for VS .NET Control to generate, create ANSI/AIM Code 39 image in VS .NET applications.
www.OnBarcode.com
Linear Barcode Creator In Java
Using Barcode drawer for Java Control to generate, create 1D image in Java applications.
www.OnBarcode.com
The data access methods for a child object are different from those of a root object. The names of these methods are as follows: Child_Create() Child_Fetch() Child_Insert() Child_Update() Child_DeleteSelf() The BusinessBase class does not provide virtual implementations of these methods; they must be explicitly declared by the author of the child class. These methods are called by the data portal to notify each child object when it should perform its data persistence operations. BusinessBase provides a great deal of functionality to the business objects, whether root or child. 6 covers the implementation of BusinessBase itself, and s 17 and 18 show how to create business objects using BusinessBase.
Editable Root List
The BusinessListBase class is the base from which all editable collections of business objects are created. Given an InvoiceEdit object with a collection of LineItem objects, BusinessListBase is the base for creating that collection: [Serializable] public class LineItems : BusinessListBase<LineItems, LineItem> { } When creating a subclass, the business developer must provide the specific types of his new business collection, and the child objects the collection contains, as type parameters to BusinessListBase<T,C>. This allows the generic type to expose strongly typed methods corresponding to the specific business collection type and the type of the child objects. The result is that the business collection automatically has a strongly typed indexer, along with strongly typed Add() and Remove() methods. The process is the same as if the object had inherited from System.ComponentModel.BindingList<T>, except that this collection will include all the functionality required to support n-level undo, object persistence, and the other business object features.
Copyright © OnBarcode.com . All rights reserved.