asp.net点击‘查看更多’实现无刷新加载

页面页面的js代码如下，
01 <b>    <script type="text/javascript">
02         $(function () {
03             function init(count, start) {
04                 $.ajax({
05                     type: "GET",
06                     dataType: "json",
07                     url: "Handler/Handler.ashx",
08                     data: { action: "GetMoreNews", count: count, start: start },
09                     beforeSend: function () { $("#divload").show(); $("#more2").hide(); },
10                     complete: function () { $("#divload").hide(); $("#more2").show(); },
11                     success: function (json) {
12                         var str = "";
13                         $.each(json, function (index, array) {
14                             var str = "<div class='single_item'>"
15                                                 + "<div class='element_head'>"
16                                                     + "<div class='author'>" + array['Title'] +"</div>"
17                                                     + "<div class='date'>" + array['Date'] + "</div>"
18                                                 + "</div>"
19                                             + "<div class='content'>" + array['Contents'] + "</div>"
20                                             + "</div>";
21                             $("#more").append(str);
22                         });
23                         if (json == "") {
24                             $("#more2").html("没有更多内容加载了……");
25                         }
26                     }
27                 });
28             }
29             var count = 5;
30             var start = 0;
31             init(count, start);
32             $(".get_more").click(function () {
33                 start += 5;
34                 init(count, start);
35             });
36         });
37     </script></b>
解释上面js的大体意思：定义一个init方法，此方法带有两个参数count和start，count意思是每次加载显示评论数，start意思是，每次从数据库中读取的位置，比如0，5,10。
Handler.ashx处理页面的代码如下
1 <b>case "GetMoreNews":
2      int count = int.Parse(context.Request.QueryString["count"].ToString());
3      int start = int.Parse(context.Request.QueryString["start"].ToString());
4      IList<WineNews> morenews = WineNewsManager.WineNewsQueryFromMToN(count,start);
5      Content = JavaScriptConvert.SerializeObject(morenews);
6       break;</b>
WineNewsQueryFromMToN代码如下
01 <b>public static IList<WineNews> WineNewsQueryFromMToN(int count,int start)
02     {
03         using (SqlConnection cn = new SqlConnection(SQLHelp.Conn))
04         {
05             cn.Open();
06             string sql = "SELECT TOP " + count + " f.* FROM tb_WineNews f

补充：Web开发 , ASP.Net ,