获得客户IP

 private void Page_Load(object sender, System.EventArgs e)
  {
   Label2.Text = getIp();
   HttpBrowserCapabilities bc = new HttpBrowserCapabilities(); 
   bc = Request.Browser;
   string xitong = "你的操作系统为";
   Label1.Text = xitong + bc.Platform + " 浏览器类型:" + bc.Type;
  }
  private string getIp()
  {/*穿过代理服务器取远程用户真实IP地址：*/
   if (Request.ServerVariables["HTTP_VIA"] != null)
    return Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
   else
    return Request.ServerVariables["REMOTE_ADDR"].ToString();
  }