网页中的每个框架都会触发DocumentCompleted。困难的方法是计算框架，向您展示如何访问DOM：
private int mFrameCount;
private void startNavigate(string url) {
mFrameCount = 0;
webBrowser1.Navigate(url);
}
private void DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) {
mFrameCount += 1;
bool done = true;
if (webBrowser1.Document != null) {
HtmlWindow win = webBrowser1.Document.Window;
if (win.Frames.Count > mFrameCount && win.Frames.Count > 0) done = false;
}
if (done) {
Console.WriteLine("Now it is really done");
}
}
简单的方法是检查完成加载的URL：
private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
if (e.Url.Equals(webBrowser1.Url)) {
Console.WriteLine("Now it is really done");
}
}
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