如何避免嵌入 iframe 元素的 OnDocumentComplete 事件? [英] How do I avoid the OnDocumentComplete event for embedded iframe elements?

问题描述

我想防止 iframe 元素每次都触发 OnDocumentComplete 事件.例如，一个页面有 4 个 iframe，当我加载这个页面时，我的 OnDocumentComplete 事件运行了 4 次.我想为每个页面只运行一次 OnDocumentComplete.我该怎么做?

I want to prevent iframe elements from triggering the OnDocumentComplete event every time. For example, a page has 4 iframes, and when I load this page, my OnDocumentComplete event runs 4 times. I want to run OnDocumentComplete just once for every page. How can I do that?

也许我可以删除或阻止 TWebBrowser 控件中的 iframes.

Maybe I could remove or block iframes in TWebBrowser control.

推荐答案

事件 OnDocumentComplete 为主文档中的每个 FRAME/IFRAME 触发.
如果你想忽略它们，试试这个:

The event OnDocumentComplete is fired for each FRAME/IFRAME in the main document.
If you want to ignore them try this:

procedure TForm1.WebBrowser1DocumentComplete(Sender: TObject;
  const pDisp: IDispatch; var URL: OleVariant);
begin
  // check that the event is raised for the top-level browser (not frames or iframes)
  if pDisp = TWebBrowser(Sender).ControlInterface then
  begin
    // do something nice...
  end;
end;

<小时>

来自 Delphi 文档:

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From Delphi Docs:

编写一个 OnDocumentComplete 事件处理程序，以便在框架或文档完全加载到 Web 浏览器中时采取特定操作.对于没有框架的文档，该事件在文档加载完成时发生一次.在包含多个框架的文档上，此事件针对每个框架发生一次.当多帧文档完成加载时，Web 浏览器会最后一次触发该事件.

Write an OnDocumentComplete event handler to take specific action when a frame or document is fully loaded into the Web browser. For a document without frames, this event occurs once when the document finishes loading. On a document containing multiple frames, this event occurs once for each frame. When the multiple-frame document finishes loading, the Web browser fires the event one final time.

发件人是加载文档的 Web 浏览器.

Sender is the Web browser that is loading the document.

pDisp 是顶层框架或浏览器的自动化界面.加载没有框架的文档时，pDisp 是网页浏览器.加载具有多个框架的文档时，这是包含框架的界面，除了最后一次事件发生，当它是Web浏览器的界面.

pDisp is the Automation interface of the top-level frame or browser. When loading a document without frames, pDisp is the interface of the Web browser. When loading a document with multiple frames, this is the interface of the containing frame, except for the very last time the event occurs, when it is the interface of the Web browser.

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