WebBrowser导航function不起作用，并且不调用处理程序

代码如下。

我试图导航到一个网站并阅读信息，问题是Navigate不起作用，唯一被调用的事件是导航，打印的Url为空，其他事件从未被调用。 我错过了什么？ 我必须使用Form类才能导航？ 我不能从控制台应用程序以编程方式使用它吗？

请帮忙。

class WebNavigator { private readonly WebBrowser webBrowser; public WebNavigator() { webBrowser = new WebBrowser { AllowNavigation = true }; webBrowser.Navigated += webBrowser_Navigated; webBrowser.Navigating += webBrowser_Navigating; webBrowser.DocumentCompleted += webBrowser_DocumentCompleted; } // Navigates to the given URL if it is valid. public void Navigate(string address) { if (String.IsNullOrEmpty(address)) return; if (address.Equals("about:blank")) return; if (!address.StartsWith("https://") && !address.StartsWith("https://")) { address = "https://" + address; } try { Trace.TraceInformation("Navigate to {0}", address); webBrowser.Navigate(new Uri(address)); } catch (System.UriFormatException) { Trace.TraceError("Error"); return; } } // Occurs when the WebBrowser control has navigated to a new document and has begun loading it. private void webBrowser_Navigated(object sender, WebBrowserNavigatedEventArgs e) { Trace.TraceInformation("Navigated to {0}", webBrowser.Url); } // Occurs before the WebBrowser control navigates to a new document. private void webBrowser_Navigating(object sender, WebBrowserNavigatingEventArgs e) { Trace.TraceInformation("Navigating to {0}", webBrowser.Url); } private void webBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) { var wb = sender as WebBrowser; Trace.TraceInformation("DocumentCompleted {0}", wb.Url); } } 

 static async void DoWork() { var html = await GetHtmlAsync("https://www.google.com/"); } 

 static Task GetHtmlAsync(string url) { var tcs = new TaskCompletionSource(); var thread = new Thread(() => { WebBrowser wb = new WebBrowser(); WebBrowserDocumentCompletedEventHandler documentCompleted = null; documentCompleted = async (o, s) => { wb.DocumentCompleted -= documentCompleted; await Task.Delay(2000); //Run JS a few seconds more tcs.TrySetResult(wb.DocumentText); wb.Dispose(); Application.ExitThread(); }; wb.ScriptErrorsSuppressed = true; wb.DocumentCompleted += documentCompleted; wb.Navigate(url); Application.Run(); }); thread.SetApartmentState(ApartmentState.STA); thread.Start(); return tcs.Task; } 

  webBrowser.Navigate(new Uri(address)); while (!navigationCompleted) { Application.DoEvents(); Thread.Sleep(navigationPollInterval); }