C # does not implement Article List page, click the Load achieve more

First, add a front-end load more button, using ajax asynchronous background data acquisition, data acquisition is successful, if the background data is greater than the number of custom pieces, then splice plate layout page list of articles, tips or No more data.

<div class="load" id="load"><a href="javascript:loadMore();">加载更多</a></div>						
	<script type="text/javascript">
	var pageindex = 1; //页数
	var pagesize = 8; //每页条数
	function loadMore() {
	$.ajax({
	url: '/dev/ClickLoad.ashx',
	type: 'POST',
	dataType: 'json',
	data: {
	action: 'more',
	pageindex: ++pageindex,
	pagesize: pagesize,
	cid: '<%=category_id%>'
		},
	success: function(d) {
		if(d.code == 0) {
		var str = "";
		jQuery.each(d.data, function(i, o) {
     var onlyDate =o.add_time.substring(0,10);		
     str += '<li>' +									   	                            
	 '<div class="photo_box">' +
	'<a href="bulletinboard_show.aspx?id='+o.id+'" title="' + o.title + '">' +
	'<i>'+'</i>' +
	'<span>' +o.title+
	'</span>' +
	'</a>' +
	'<em>' +onlyDate+
	'</em>' +
	'</li>';
	})
	$("#all").append(str);
	if(d.datanum < pagesize) {
	$('#load').html("暂无更多数据");
		}
		} else {
	$('#load').html("暂无更多数据");
		}
		},
		error: function(e) {}
		})
		}
	</script>

Logic processing

<%@ WebHandler Language="C#"  Class="DTcms.Web.dev.ClickLoad" %>
using System;
using System.Collections.Generic;
using System.Web;
using System.IO;
using System.Text;
using System.Data;
using System.Data.Sql;
using System.Data.SqlClient;
using DTcms.Common;
using DTcms.DBUtility;
using NetWing.Common.Data.SQLServer;
using NetWing.Common.Request;
using NetWing.Common;
namespace DTcms.Web.dev
{
    /// <summary>
    /// dev 的摘要说明
    /// </summary>
    public class ClickLoad : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            string action = context.Request["action"];
            if (string.IsNullOrEmpty(action))
            {
                context.Response.Write("{\"code\":1000, \"msg\":\"请求失败,参数有误!\"}");
                return;
            }
            switch (action)
            {
                case "more":
                    GetMore(context);
                    break;
            }
        }

        public void GetMore(HttpContext context)
        {
            int pageindex = int.Parse(context.Request["pageindex"]);//当前第几页
            int pagesize = int.Parse(context.Request["pagesize"]);//每页记录条数
            string cid = context.Request["cid"];
            string strWSQL = "1=1";
            if (!string.IsNullOrEmpty(cid))
            {
                strWSQL = " category_id=" + cid;
            }
            string sqls = "select count(id) from dt_article where " + strWSQL + "";
            int allsize = (int)SqlEasy.ExecuteScalar(sqls);//总条数
            int allpagesiza = 0;
            decimal de = 0M;
            if (allsize != 0)
            {
                de = Convert.ToDecimal(allsize) / Convert.ToDecimal(pagesize);
                allpagesiza = (int)Math.Ceiling(de);
            }
            int pagenum = (pageindex - 1) * pagesize;
            DataTable dt = SqlEasy.ExecuteDataTable("select top " + pagesize + " * from(select row_number() over(order by sort_id asc,add_time desc,id desc) as rownumber,* from dt_article where " + strWSQL + ") A where rownumber > " + pagenum + "");
          
            if (dt.Rows.Count > 0)
            {
                context.Response.Write("{\"code\":0,\"msg\":\"获取成功!\",\"data\":" + JSONhelper.ToJson(dt, false) + ",\"datanum\":" + dt.Rows.Count + "}");
            }
            else
            {
                context.Response.Write("{\"code\":1000,\"msg\":\"暂无数据!\"}");
            }
        }


        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}