获取当前登录的QQ号码(C#)

private void button1_Click(object sender, EventArgs e)
{
if(web.ReadyState != WebBrowserReadyState.Complete){
MessageBox.Show("网页尚未加载完毕,请稍等.");
return;
}

lvwUins.Items.Clear();

HtmlDocument doc = web.Document;
HtmlElement uinList = doc.GetElementById("list_uin");
if(uinList != null){
for (int i = 0; i < uinList.Children.Count; i++) {
string str = uinList.Children[i].InnerText.Trim();

//分割昵称和QQ号码
string[] temp = str.Split(' ');
string nick = temp[0];
string uin = temp[1];

//去除括号
uin = uin.Replace("(", "").Replace(")", "");

ListViewItem item = new ListViewItem();
item.Text = nick;
item.SubItems.Add(uin);
lvwUins.Items.Add(item);
}
}
}