一尘不染

新线程中的WebBrowser控件

c#

我有一个列表Uri,我想“单击”以实现此目的,我正在尝试为每个Uri创建一个新的Web浏览器控件。我为每个Uri创建一个新线程。我遇到的问题是文档之前的线程结束已完全加载,所以我再也无法利用DocumentComplete事件了,我该如何克服呢?

var item = new ParameterizedThreadStart(ClicIt.Click); 
var thread = new Thread(item) {Name = "ClickThread"}; 
thread.Start(uriItem);

public static void Click(object o)
{
    var url = ((UriItem)o);
    Console.WriteLine(@"Clicking: " + url.Link);
    var clicker = new WebBrowser { ScriptErrorsSuppressed = true };
    clicker.DocumentCompleted += BrowseComplete;
    if (String.IsNullOrEmpty(url.Link)) return;
    if (url.Link.Equals("about:blank")) return;
    if (!url.Link.StartsWith("http://") && !url.Link.StartsWith("https://"))
        url.Link = "http://" + url.Link;
    clicker.Navigate(url.Link);
}

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2020-05-19

共1个答案

一尘不染

您必须创建一个STA线程来泵送消息循环。对于像WebBrowser这样的ActiveX组件,这是唯一的好客环境。否则,您将不会获得DocumentCompleted事件。一些示例代码:

private void runBrowserThread(Uri url) {
    var th = new Thread(() => {
        var br = new WebBrowser();
        br.DocumentCompleted += browser_DocumentCompleted;
        br.Navigate(url);
        Application.Run();
    });
    th.SetApartmentState(ApartmentState.STA);
    th.Start();
}

void browser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) {
    var br = sender as WebBrowser;
    if (br.Url == e.Url) {
        Console.WriteLine("Natigated to {0}", e.Url);
        Application.ExitThread();   // Stops the thread
    }
}
2020-05-19