在C＃中向WebBrowser添加事件DocumentCompleted

Question

I want to add a event DocumentCompleted to my control WebBrowser. This is my code. but it doesn't work.

  <asp:Button id="Button_Auth" Text="Authentification" OnClick="Authentification_Click" runat="server"/> <asp:label id="Messages" runat="server"/> 

     public void Authentification_Click(object sender, EventArgs e)
    {
        string input = "https://www.google.fr";
        runBrowserThread(input );

        Messages.Text = "ok";
    }



    private void runBrowserThread(String url)
    {
        var th = new Thread(() => {
            var br = new WebBrowser();
            br.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(browser_DocumentCompleted);
            br.Navigate(url,true);
        });
        th.SetApartmentState(ApartmentState.STA);
        th.Start();
    }

    public void browser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
    {
        var br = sender as WebBrowser;
        Messages.Text = e.Url.ToString();

    }

What I want is open a new page webBrowser and everytime when the page(in the case https://www.google.fr )finishes loading, For example, User enter a key word and search it. when the page of result finishes loading, I will get back the url of result https://www.google.fr/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=keyword and display it in my label Messages.

I don't know why my code doesn't work.

Answer 1

Check whether the event is right fully wierd to your event handler.

Is it a asp.net application or is it winforms application or wpf application? In asp.net application this event is not available. If asp.net try JavaScript