jQuery+Asp.net 实现简单的下拉加载更多功能

原来做过的商城项目现在需要增加下拉加载的功能，简单的实现了一下。大概可以整理一下思路跟代码。

把需要下拉加载的内容进行转为JSON处理存在当前页面：

<script type="text/javascript">var objson = eval([{"Id":"5991","product_name":"正品璐瑶颈肩按摩器  披肩颈椎按摩","order_by":"98569","is_show":"True","price":"428","sale_price":"399","Images":"saxjua16.jpg"},{"Id":"5990","product_name":"多功能绞肉机  家用料理机 电动搅拌机","order_by":"98568","is_show":"True","price":"429","sale_price":"399","Images":"d2yjivhl.jpg"},....更多省略]</script>

下面就是javascript代码的事情了

<script type="text/javascript">

        $(document).ready(function () {

            var totalheight = 0;

            function loadData() {

                totalheight = parseFloat($(window).height()) + parseFloat($(window).scrollTop());

                if ($(document).height() <= totalheight) {

                    GetProducts();//加载数据

                }

            }

            $(document).scroll(function () {

                loadData();

            });

            function GetProducts() {

                var htmlSource;

                var iIndex = 6; //每次加载元素数量

                var icount = parseInt($("#hidJsonCount").val()); //已加载数量 作为for下标值

                var obj = objson;

                if (obj.length - icount < 6) {

                    iIndex = obj.length - icount;

                }

                if (icount < obj.length) {

                    for (var i = icount; i < (icount+iIndex); i++) {

                        var val = obj[i];

                        htmlSource += '<div class="deal">';

                        htmlSource += '<a href="p_show.aspx?productId=' + val.Id + '" target="_blank">';

                        htmlSource += '<img src="http://www.baidu.com/upload-file/images/product/' + val.Images + '" alt="" border="0" title="' + val.product_name + '"></a>';

                        htmlSource += '<h3>';

                        htmlSource += '<a href="p_show.aspx?productId=' + val.Id + '" title="' + val.product_name + '" target="_blank">' + val.product_name + '</a>';

                        htmlSource += '</h3>';

                        htmlSource += '<h4>';

                        htmlSource += '<em><b>¥</b>' + val.sale_price + '</em><a href="p_show.aspx?productId=' + val.Id + '" target="_blank">查看</a>';

                        htmlSource += '</h4>';

                        htmlSource += '<span class="newicon"></span>';

                        htmlSource += '</div>';

                    }

                    $("#hidJsonCount").val((icount + iIndex).toString());

                }

                $("#moreProduct").append(htmlSource);

            }

        });

    </script>

$("#hidJsonCount").val();此处为一个input hidden的隐藏标签 用来存储已经加载了多少数据。

至此功能完结。