问题描述
比方说我有这个:
dynamic foo = new Foobar();
我有这个:
public class Foobar : DynamicObject
{
}
问题是，是否可以重写 DynamicObject 的成员，以便此代码:
The question is, is it possible to override members of DynamicObject so that this code:
string name = new Foobar().Name
在运行时是否抛出 Exception ?如果 Name 不是成员，我想为 name 返回 default .
Does not throw an Exception at run-time? I want to return default for name's if Name is not a member.
可能吗?我需要覆盖什么?
Possible? What do I need to override?
推荐答案
覆盖TryGetMember(和TrySetMember).从DynamicObject类派生的类可以重写此方法，以指定操作的动态行为，例如获取属性的值.
Override TryGetMember (and TrySetMember). Classes derived from the DynamicObject class can override this method to specify dynamic behavior for operations such as getting a value for a property.
http://msdn.microsoft.com/zh-我们/library/system.dynamic.dynamicobject.aspx http://msdn.microsoft.com/en-us/library/system.dynamic.dynamicobject.trygetmember.aspx
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