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Docs > Getting Started > In-Depth XAF WinForms & Web Forms Tutorial (Main Demo) > Business Model Design
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V22.1
.NET Framework 4.5.2+
Cross-Platform .NET App UI (XAF)
Getting Started
Basic ASP.NET Core Blazor Tutorial (Simple Project Manager Demo)
In-Depth XAF ASP.NET Core Blazor UI Tutorial (Main Demo)
In-Depth XAF WinForms & Web Forms Tutorial (Main Demo)
Business Model Design
Create a Solution using the Wizard
Inherit from the Business Class Library Class
Supply Initial Data
Implement Custom Business Classes and Reference Properties
Add a Class from the Business Class Library
Set a Many-to-Many Relationship
Set a One-to-Many Relationship
Initialize a Property After Creating an Object
Implement Dependent Reference Properties
Implement Property Value Validation in Code
Extend Functionality
UI Customization
Extra Modules
Security System
Installation, Upgrade, Version History
Backend Web API Service
UI Shell and Base Infrastructure
Storage, ORM, and Business Model Design
Data Manipulation and Business Logic
User Interface and Behavior Customization
Data Filtering
Data Security and Safety
Validation (Prevent Data Errors)
Conditional Appearance (Manage State of UI Elements)
Reporting (Shape, Export & Print Data)
Analytics (Extract Data Insights)
Document Management
Business Process Management
Event Planning
Localization
Debugging, Testing and Error Handling
Deployment
Support, QA & Troubleshooting
API Reference
Download CHM

Business Model Design

  • 2 minutes to read

Note

This section describes the use of the eXpress Persistent Objects (XPO) object-relational mapping (ORM) tool.

In this section, you will learn how to design a business model (database) when building business applications via the eXpressApp Framework. You will create business classes that will be mapped to database tables. You will also learn how to set relationships between classes, implement dependent properties, validate property values, and so on.

To design a business model, the following techniques will be used.

  • Use the Business Class Library

    The Business Class Library provides the most commonly used business classes, such as Person, Event, Task, etc. You can use a class from this library as is, or inherit from it to extend it.

  • From Scratch

    If the Business Class Library does not provide the appropriate business class, inherit from one of the Base Persistent Classes.

Tip

If you need to build an application based on an existing database, refer to the following help topic: How to: Generate XPO Business Classes for Existing Data Tables.

After completing the tutorial, you will have WinForms and ASP.NET Web Forms applications.

Tutorial_BMD_Lesson0_1

The ASP.NET Web Forms application will provide almost the same functionality, but via a slightly different set of visual elements.

Tutorial_BMD_Lesson0_2

Tutorial_BMD_Lesson0_3

Proceed to Create a Solution using the Wizard to start the tutorial.