public void loaddata()
        {
            Maticsoft.BLL.weixin wx_bll = new BLL.weixin();
            string open_id = "";

            if (Session["open_id"] == null)
            {
                string code = Request.QueryString["code"];
                if (code != null && code != "")
                {
                    open_id = wx_bll.get_openid(code);
                    if (open_id != null && open_id != "")
                    {
                        Session["open_id"] = open_id;
                        loadinfo(open_id);
                    }
                    else
                    {
                        Response.Write(@"<script>alert('无法获取您的微信信息,返回首页');window.location='m_weixin\index.aspx'</script>");
                    }
                }
                else
                {
                    Response.Write(@"<script>alert('无法获取您的微信信息,返回首页');window.location='m_weixin\index.aspx'</script>");
                }
            }
            else
            {
                open_id = Session["open_id"].ToString();
                loadinfo(open_id);
            }
        }