Question

this code doesn’t work why?

private void web_FBCheck_Navigating(object sender, WebBrowserNavigatingEventArgs e)
{
    if (web_FBCheck.Url.ToString() == ("http://facebook.com/"))
    {
        MessageBox.Show("Welcome to Facebook");
        textBox3.Text = web_FBCheck.Url.ToString();
    }            
}

or use if (web_FBCheck.Url.ToString() == "http://facebook.com/") without ( ) in the link

Answer 1

I’d guess it’s because you’re handling Navigating instead of Navigated, and possibly because of URL formatting. You should be doing something like this instead:

private void web_FBCheck_Navigating(object sender, WebBrowserNavigatingEventArgs e) {
    if(e.Url.Host.ToLower().IndexOf("facebook.com") > -1) {
        MessageBox.Show("Welcome to Facebook");
        TextBox3.Text = web_FBCheck.Url.ToString();
    }
}