c# - Web 浏览器未触发 DocumentCompleted 事件

Question

我正在尝试实现简单的网页屏幕捕获程序。当我在 UI 线程上使用我的代码时，一切似乎都没有问题，但是当我从非 UI 线程调用方法时，我无法再触发 WebBrowserDocumentCompleted 事件。我也试过这个:

System.Windows.Forms.WebBrowser wb = new System.Windows.Forms.WebBrowser();
        wb.DocumentCompleted += WebBrowserDocumentCompleted;
        wb.Visible = true;
        wb.ScrollBarsEnabled = false;
        wb.ScriptErrorsSuppressed = true;
        wb.Navigate(url);

        while (wb.ReadyState != System.Windows.Forms.WebBrowserReadyState.Complete)
        {
            Application.Current.Dispatcher.Invoke(DispatcherPriority.Background,
                                              new Action(delegate { }));
        }

程序只是无限期地卡在 while 循环中。有什么想法吗？

Answer 1

像这样:

public void Start()
{
    System.Windows.Forms.WebBrowser wb = new System.Windows.Forms.WebBrowser();
    wb.DocumentCompleted += WebBrowserDocumentCompleted;
    wb.Visible = true;
    wb.ScrollBarsEnabled = false;
    wb.ScriptErrorsSuppressed = true;
    wb.Navigate(url);
}

private void WebBrowserDocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
    if( (sender as WebBrowser).ReadyState == System.Windows.Forms.WebBrowserReadyState.Complete)
    {
        // Do what ever you want to do here when page is completely loaded.
    }
}

希望这对您的探索有所帮助。