C# WebBrowser 控件——在 AJAX 之后获取文档元素? [英] C# WebBrowser control -- Get Document Elements After AJAX?

问题描述

我正在编写一个应用程序，该应用程序使用 WebBrowser 控件来查看 Web 内容，这些内容可以通过添加新内容/元素的 AJAX 进行更改.我似乎无法以任何尝试过的方式获得新元素.BrowserCtl.DocumentText 没有最新的页面，当然它也不在查看源代码"中.

I'm writing an application that uses the WebBrowser control to view web content that can change with AJAX that adds new content/elements. I can't seem to get at the new elements any way I've tried. BrowserCtl.DocumentText doesn't have the up-to-date page and of course it's not in "view source" either.

有什么方法可以使用此控件获取这些新数据?:(请帮忙.谢谢！

Is there some way to get this new data using this control? :( Please help. Thanks!

浏览器:

Browser.Navigate("www.somewebpagewithAJAX.com");
//Code that waits for browser to finish...
...
//WebBrowser control has loaded content and AJAX has loaded new content
// (is visible at runtime on form) but can't see them in Browser.Document.All
// or Browser.DocumentText :(

推荐答案

我为我解决了这个问题.

I solved the problem for me.

关键是，为通过 ajax 调用填充的 div 元素的 onPropertyChanged 事件附加一个处理程序.

the key is, attaching a handler for onPropertyChanged event of the div element which is being populated via ajax call.

HtmlElement target = webBrowser.Document.GetElementById("div_populated_by_ajax");

if (target != null)
{
      target.AttachEventHandler("onpropertychange", handler);
}

最后，

private void handler(Object sender, EventArgs e)
{
      HtmlElement div = webBrowser.Document.GetElementById("div_populated_by_ajax");
      if (div == null) return;
      String contentLoaded = div.InnerHtml; // get the content loaded via ajax
}

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