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Docs > Getting Started > In-Depth XAF WinForms & Web Forms Tutorial (Main Demo) > Business Model Design > Add a Class from the Business Class Library
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V22.1
.NET Framework 4.5.2+
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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
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Add a Class from the Business Class Library (XPO)

  • 2 minutes to read

Tip

For .NET 6 applications, see: Inherit from the Business Class Library Class (XPO, .NET 6).

In this lesson, you will learn how to use business classes from the Business Class Library as is. For this purpose, you will add the Event business class to the application.

Note

Before proceeding, take a moment to review the Inherit from the Business Class Library Class lesson.

  • In the Solution Explorer, find the Module.cs (Module.vb) file within the MySolution.Module project. Double-click it to invoke the Module Designer.

    Tutorial_BMD_Lesson4_0_0

  • In the Exported Types section, locate the Referenced Assemblies | DevExpress.Persistent.BaseImpl.Xpo.v22.1 | Event node. Select it and press the SPACEBAR, or right-click it and choose Use Type in Application in the invoked context menu. The node will be marked in bold. This means that the Event business class will be added to the Application Model, and this class will take part in the UI construction process. The use of extra modules is detailed in the Extra Modules section of this tutorial.

    Tutorial_BMD_Lesson4_0

  • Run the WinForms or ASP.NET Web Forms application and note that the Scheduler Event navigation item is created, as the Event class has the NavigationItemAttribute applied. Note that it may be necessary to add other classes from the Business Class Library to the navigation manually (see the Add an Item to the Navigation Control topic).

    Tutorial_BMD_Lesson4_10

Tip

XAF has a special Scheduler module contains List Editor that uses the Scheduler Control (Win/Web) to display and manage Event business objects in XAF applications. Refer to the Add the Scheduler Module lesson to learn how to use it in your application.

You can see the changes made in the Main Demo installed with XAF. The MainDemo application is installed in %PUBLIC%\Documents\DevExpress Demos 22.1\Components\XAF\MainDemo by default. The ASP.NET Web Forms version is available online at https://demos.devexpress.com/XAF/MainDemo.

 

Next Lesson: Set a Many-to-Many Relationship

See Also