滚动条加载数据 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>动态加载</title>
    <style type="text/css">ul{ list-style:none;}li{border-bottom:1px dashed #79A7E2; margin-bottom:20px;}  </style>
    <script type="text/javascript" src="/js/jquery-1.7.1.min.js"></script>    
    <script type="text/javascript">        
        var _times;
        var _loading;
        var _pageindex;
        $(function () {
            _loading = $("#loading");
            _times = setInterval("Comment()", 1000);
        });
        function load() {
            _pageindex = $.trim(_loading.attr("pageindex"));
            $.ajax({
                type: "post",
                dataType: "json",
                async: false,
                url: "/ajax/AjaxGroup.aspx",
                data: { action: "getArea", "pageindex": _pageindex },
                success: function (data) {
                    if (data == null) {
                        _loading.html("数据已读取完成");
                        clearInterval(_times);
                    } else {
                        var _l = data.length;
                        _loading.attr("pageindex", parseInt(_pageindex) + 1);
                        var _temp = "";
                        for (var i = 0; i < _l; i++) {
                            _temp += "<li>" + data[i]["name"] + "</li>";
                        }
                        if (_temp.length > 0) {
                            //$("#info").append(_temp);
                            $(_temp).insertBefore(_loading);
                        }
                    }
                },
                error: function (ee1, ee2, ee3) {
                    _loading.css("color", "red");
                    _loading.html("数据读取出错！");
                }
            });
        }
        function Comment() {
            var top = document.documentElement.scrollTop + document.body.scrollTop;
            var textheight = $(document).height();
            if ((textheight - top - $(window).height()) < 100) { load(); }
        }
    </script>
</head>
<body>
    <ul><li id="loading" style="color:Green;" pageindex="1"><img src="/images/loading.gif" alt="系统正在提取数据" />请稍后，系统正在提取数据。。。</li></ul>
    <label>asdfasdfasfdasdf</label>
</body>
</html>
Util gjBll = new Util();
    MySqlExecute mseBll = new MySqlExecute();
    protected void Page_Load(object sender, EventArgs e)
    {
        string host = Request.UrlReferrer.Host;
        if (string.Compare(host, Request.Url.Host) > 0)
        {
            return;
        }
        Response.Clear();
        string action = gjBll.getFormString("action");
        Type t = this.GetType();
        MethodInfo m = t.GetMethod(action);
        Response.Write(gjBll.getToString(m.Invoke(this, null)));
        Response.End();
    }
    public string getArea() 
    {
        System.Text.StringBuilder sb = new System.Text.StringBuilder();
        int pageindex = gjBll.getFormInt("pageindex");
        if (pageindex > 0) 
        {
            DataTable dt = mseBll.GetList(150, pageindex, "", "", "select AreaName from TB_Area").Tables[2];
            if (dt != null && dt.Rows.Count > 0)
            {                
                foreach (DataRow dr in dt.Rows) 
                {
                    sb.Append(",{\"name\":\"" + dr["AreaName"] + "\"}");
                }
                if (sb.Length > 0) 
                {
                    return string.Format("[{0}]", sb.ToString().Substring(1));
                }
            }
        }
        return sb.ToString();
    }

 

posted @ 2012-11-13 17:13  一千零一夜  阅读(307)  评论(0)    收藏  举报