一,PersistentAliasAttribute-[XPO提供] Indicates that a property is not persistent and its value is calculated based upon the values of a specific field(s). 指示某个属性不是持久性的, 并且它的值是根据特定字段的值计算的. The expression to be evaluated can be passed as the constructor'…
In this lesson, you will learn how to manage calculated properties. For this purpose, the Payment class will be implemented. Its Amount property value will be calculated using the Rate and Hours properties. The value will be updated immediately after…
This topic describes how to implement a business class, so that one of its properties is calculated based on a property(ies) of the objects contained in the child object collection. 本主题介绍如何实现 Business 类,以便基于子对象集合中包含的对象的属性计算其属性之一. Tip 提示 A complete sa…