Question

这是我的类GeckoBrowserForm

namespace NCrawler.GeckoProcessor
{
    public partial class GeckoBrowserForm : Form
    {
        #region Readonly & Static Fields

        private static bool s_IsXulrunnerInitialized;
        private readonly GeckoWebBrowser m_GeckoWebBrowser = new GeckoWebBrowser();
        private readonly string m_Url;
        private SynchronizationContext m_uiContext;

        #endregion

        #region Constructors

        static GeckoBrowserForm()
        {   
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
        }

        public GeckoBrowserForm(string xulRunnerPath, string url)
        {
            m_uiContext = SynchronizationContext.Current;
            if (m_uiContext == null)
            {
                m_uiContext = new SynchronizationContext();
            }

            InitializeXulRunner(xulRunnerPath);
            m_Url = url;
            ShowInTaskbar = false;
            StartPosition = FormStartPosition.Manual;
            Location = new Point(0, 0);
            Size = new Size(800, 800);
            Done = false;
            InitializeComponent();
        }

        #endregion

        #region Instance Properties

        public string DocumentDomHtml { get; set; }
        public Boolean Done { get; set; }

        #endregion

        #region Instance Methods

        protected override void OnLoad(EventArgs e)
        {   
            Thread thread = new Thread(new ThreadStart(DoWork));
            thread.Start();
        }

        private void DoWork()
        {
            // lets see the thread id
            int id = Thread.CurrentThread.ManagedThreadId;
            Trace.WriteLine("Run thread: " + id);

            m_uiContext.Send(new SendOrPostCallback(_ =>
            {
                m_GeckoWebBrowser.Parent = this;
                m_GeckoWebBrowser.Dock = DockStyle.Fill;
                m_GeckoWebBrowser.DocumentCompleted += (s, ee) =>
                {
                    GeckoHtmlElement element = null;
                    var geckoDomElement = m_GeckoWebBrowser.Document.DocumentElement;
                    if (geckoDomElement != null && geckoDomElement is GeckoHtmlElement)
                    {
                        element = (GeckoHtmlElement)geckoDomElement;
                        DocumentDomHtml = element.InnerHtml;
                    }
                };

                m_GeckoWebBrowser.Navigate(m_Url);
            }), null);
        }

        #endregion

        #region Class Methods

        private static void InitializeXulRunner(string path)
        {
            if (s_IsXulrunnerInitialized)
            {
                return;
            }

            s_IsXulrunnerInitialized = true;
            Xpcom.Initialize(path);
        }

        #endregion
    }
}

但是DoWork方法获得了一次删除

GeckoFx只能从它所在的同一个线程中调用初始化（通常是UI线程）

我已经读过我需要使用SynchronizationContext，但它是一样的。还是一样的错误。我正在使用

在其他项目中停止表格

GeckoBrowserForm geckoBrowserForm = new GeckoBrowserForm(XulRunnerPath, Uri.ToString()))
geckoBrowserForm.Show();

并且它在内部线程中，所以我想拥有5 browsers。

我该怎么办？ SynchronizationContext是否已正确实施？

GeckoFx只能从初始化它的同一个线程（通常是UI线程）中调用。 SynchronizationContext不起作用

0 个答案: