為什么 IHTMLDocument2 不等於 IHTMLDocument2.body.document？

Question

為什么以下 doc2 與 doc22 不同？

IHTMLDocument2 doc2 = (pDisp as IWebBrowser2).Document as IHTMLDocument2;
IHTMLDocument2 doc22 = doc2.body.document as IHTMLDocument2;
bool isequal = Marshal.GetIUnknownForObject(doc2) == Marshal.GetIUnknownForObject(doc22);
//Here, isequal is false. Why?

Answer 1

對我來說，最可能的解釋是為同一事物創建了不同的包裝對象。 誰知道 MSHTML 如何在內部進行管理。 只要((pDisp as IWebBrowser2).Document as IHTMLDocument3).documentElement as IUnknown == (((pDisp as IWebBrowser2).Document as IHTMLDocument2).body.document as IHTMLDocument3).documentElement as IUnknown世界是有序的；)