Initialize a Property After Creating an Object (EF 6)

• Jun 25, 2021
• 3 minutes to read

In this lesson, you will learn how to set the default value for a particular property of a business class. For this purpose, the Priority property will be added to the DemoTask class created in the Set a Many-to-Many Relationship (EF 6) lesson. To initialize it, assign a value to this property in the constructor.

Note

Before proceeding, take a moment to review the following lessons:

• Inherit from the Business Class Library Class (EF 6)

• Set a Many-to-Many Relationship (EF 6)

• Add the Priority property to the DemoTask class and declare the Priority enumeration, as shown below:

• In the Module.cs (Module.vb) file, register the Priority enumeration type in the constructor of your ModuleBase descendant using the EnumProcessingHelper.RegisterEnum method as follows.

• Use the code below to initialize the newly added Priority property when a DemoTask object is created.

• Run the WinForms or ASP.NET Web Forms application. Create a new DemoTask object by selecting DemoTask in the drop-down list of the New ( ) button. (In the Detail View that represents the newly created DemoTask object, note that the Priority property is set to Normal , as declared in the code above.) Notice that the enumeration property is automatically displayed by the combo box editor.

You can see the code demonstrated in this lesson in the MySolution.Module | Business Objects | DemoTask.cs (DemoTask.vb) file of the EF Demo (Code First) installed with XAF. By default, the EF Demo (Code First) application is installed in %PUBLIC%\Documents\DevExpress Demos 21.2\Components\eXpressApp Framework\EFDemoCodeFirst.

Next Lesson: Implement Dependent Reference Properties (EF 6)