Add a Class from the Business Class Library从业务类库添加类（EF）

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.

在本课中，您将学习如何使用来自 Business 类库中的业务类。为此，您将事件业务类添加到应用程序。

Note

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

注意
在继续之前，请花点时间复习从商务舱库类 （EF） 课程继承。

• Register the Event and Resource classes in DbContext. Edit the BusinessObjects\MySolutionDbContext.cs file as shown below.

• 在 DbContext 中注册事件和资源类。编辑业务对象_MySolutionDbContext.cs 文件，如下所示。

  public class MySolutionDbContext : DbContext {
      //...
      public DbSet<Event> Events { get; set; }
      public DbSet<Resource> Resources { get; set; }
  }

• Rebuild the solution.

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

• 重建解决方案。
• 在解决方案资源管理器中，在 MySolution.模块项目中查找Module.cs（模块.vb）文件。双击以调用模块设计器。

  

• In the Exported Types section, locate the Referenced Assemblies | DevExpress.Persistent.BaseImpl.EF.v19.2 | 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.

• 在"导出的类型"部分中，找到引用的程序集 |开发快车.持久.BaseImpl.EF.v19.2 |事件节点。选择它并按空格键，或右键单击它，并在调用的上下文菜单中选择"在应用程序中使用类型"。节点将以粗体标记。这意味着事件业务类将添加到应用程序模型中，此类将参与 UI 构造过程。本教程的"额外模块"部分详细介绍了额外模块的使用。

• 

  If the Event class is not available in the Exported Types section, please ensure that your solution was rebuilt after registering this class in DbContext and restart the designer.

• 如果事件类在"导出类型"部分中不可用，请确保在 DbContext 中注册此类并重新启动设计器后重新生成解决方案。

• Run the WinForms or ASP.NET 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).

• 运行 WinForms 或ASP.NET应用程序，并注意创建计划程序事件导航项，因为事件类已应用了导航项属性。请注意，可能需要手动将业务类库中的其他类添加到导航中（请参阅向导航控制主题添加项目）。

• 

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 code demonstrated in this lesson in the EF Demo (Code First) installed with XAF. By default, the EF Demo (Code First) application is installed in %PUBLIC%\Documents\DevExpress Demos 19.2\Components\eXpressApp Framework\EFDemoCodeFirst.

提示
XAF 具有一个特殊的计划程序模块，其中包含列表编辑器，该编辑器使用计划程序控件 （Win/Web） 在 XAF 应用程序中显示和管理事件业务对象。请参阅添加计划程序模块课程，了解如何在应用程序中使用它。
您可以在随 XAF 安装的 EF 演示（代码优先）中看到本课中演示的代码。默认情况下，EF 演示（代码优先）应用程序安装在 %PUBLIC%\Documents\DevExpress Demos 19.2\Components\eXpressApp Framework\EFDemoCodeFirst 中。