DefaultMemberAttribute - 它有什么作用？ [英] DefaultMemberAttribute - what does it do?

问题描述

我已经读到它的MSDN文章。这似乎在内部是C＃集的方式，也就是功能是去工作作为索引（是吗？）。现在，我已经看到了下面的例子：

I've already read the MSDN article about it. It seems internally it is the way c# sets which is the function that is going to work as indexer(am I right?). Now, I've seen the following example:

[DefaultMemberAttribute("Main")]
public class Program {

    public static void Main() {
        ...
    }
}

现在，我不明白是什么意思。

Now, I don't get it what it means.

感谢所有。但我仍然无法从索引的东西拿到它的用处，除了。当我们要调用InvokeMember？

Thanks all. But I still can't get its usefulness, apart from the indexer thing. When are we going to call InvokeMember?

推荐答案

我个人从来没有使用过，但据我可以告诉你要定义调用的InvokeMember 。因此，您所提供的，如果我是用code片段说：

I personally have never used it, but as far as I can tell you are defining the default method to be invoked when calling InvokeMember. So, using the code snippet you provided if I was to say:

Program prog = new Program();
typeof(Program).InvokeMember("", null, null, prog, null);

由于我离开的第一个参数空InvokeMember的调用，将使用属性，以确定哪些默认成员是类的，你的情况是主。

Because I left the first argument empty of the InvokeMember call it would use the attribute to determine what the default member is of your class, in your case it is Main.

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