显示图片框？ 我看不到我在做什么错

Question

I am checking to see if a server was reachable, then setting a picturebox's "Visible" boolean to true. However, when I first ran the code, no errors appeared, but no picturebox appeared either.

There is a offlinePic (Sets Visible boolean to true, and brings to front when the test fails) There is a onlinePic (Sets Visible boolean to true, and brings to front when the test passes)

I thought it would be possible that it was the server screwing things up, so I changed it to try with Google.com, and there is no difference.

private void Launcher_Load(object sender, EventArgs e)
    {
        TestServerConnection();
    }
    public void TestServerConnection()
    {
        string url = "www.google.com";
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
        request.Timeout = 15000;
        request.Method = "HEAD";
        try
        {
            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
            {
                if (onlinePic.Visible == false) onlinePic.Visible = true;
                onlinePic.BringToFront();
            }
        }
        catch (WebException)
        {
            if (offlinePic.Visible == false) offlinePic.Visible = true;
            offlinePic.BringToFront();
        }
    }

Answer 1

The format for your url is wrong.
www.google.com should be http://www.google.com

Everything else works fine for me.

Answer 2

Not all servers can respond on HEAD try to use GET instead in request.Method . And specify protocol http in the URL.