将泛型与父/子实体一起使用
我有一个实体 A 和一个实体 B。B 继承自 A，并且是 A 的超集。我在 .ascx 上有一个方法，当前加载控件属性并绑定来自 A 实体的数据。我想扩展该方法以包含 B。我想我需要创建一个包含两者的所有字段的实体，然后将 A 或 B 转换为组合实体类型。有人还有其他建议吗？
I have a entity A and a entity B. B Inherits from A and is a superset of A. I have a method on the .ascx that currently loads control properties and binds the data from the A entity. I would like to expand the method to include B. I think I would need to create an entity that contains all of the fields from both and then cast the A or B to the Combined entity type. Anyone have any other suggestions?
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如果我理解你的问题，我会避免强制转换，而是创建一个
BindB(B b)方法，将对象传递给现有的Bind(A a)方法（不由于态射而需要强制转换），然后执行 B 属性的附加绑定。您建议的方法需要在调用之前强制转换为“超级对象”，仅对您刚刚隐藏的数据（对象的实际类型）进行有条件的操作。没有多大意义。If I understand your question, I would avoid the casting and instead create a
BindB(B b)method that passes the object to the existingBind(A a)method (no cast required thanks to morphism), then performs the additional binding for the B properties. The method you are suggesting will require a cast to the "super-object" before calling, only to operate conditionally on data you just hid (the actual type of the object). Doesn't make much sense.