webBrowser.Navigate同步

Question

我想同步调用webBrowser.Navigate（string urlString），其中webBrowser是windows窗体控件。我是这样做的

...
private delegate void NavigateDelegate(string s);
...
private void Function()
{
    NavigateDelegate navigateDelegate = 
        new NavigateDelegate(this.webBrowser1.Navigate);
    IAsyncResult asyncResult = 
        navigateDelegate.BeginInvoke("http://google.com", null, null);

    while (!asyncResult.IsCompleted)
    {
        Thread.Sleep(10);
    }

    MessageBox.Show("Operation has completed !");
}

但消息永远不会被推。为什么这段代码不能正常工作？

Answer 1

不是最好的方法，但你可以使用它......

while (this.webBrowser.ReadyState != WebBrowserReadyState.Complete)
{
     Application.DoEvents();
     Thread.Sleep(100);
}

Answer 2

而是使用它来检索页面同步：

this.webBrowser.DocumentCompleted += WebBrowserDocumentCompleted;
this.webBrowser.Navigate("http://google.com");

private void WebBrowserDocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
  MessageBox.Show("Operation has completed !");
}