瀑布流代码，简洁版 带分页_.NET_编程开发_程序员俱乐部

接上一篇   瀑布流代码，简洁版 的功能之上添加分页的功能

 

Index.cshtml

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@using PagedList.Mvc
@model PagedList.StaticPagedList<int>

@{
        ViewBag.Title = "瀑布流";
        Layout = "~/Views/Shared/_Layout.cshtml";
    }
@section header{
    <script src="~/Scripts/jquery-ui-1.8.24.min.js"></script>
    <link href="~/Content/PagedList.css" rel="stylesheet" />
    <style type="text/css">
        .* {
         margin:0px;
         padding:0px;
        }
        body {
            margin-left:auto;
            margin-right:auto;
        }
        .ClearBoth {
            clear:both;
        }
        #bodyContent {
            width:1400px;
            margin-left:auto;
            margin-right:auto;
        }
        #head {
            width:100%;
            height:50px;
            margin-bottom:10px;
        }
        #LefMenue {
            width:20%;
            height:500px;
            float:left;
        }
        #RightContent {
            width:75%;
            float:right;
            border: thin solid #333;
        }
        #Footer {
            margin-top:10px;
            width:100%;
            height:40px;
        }
        .GreyBlock {
            border: thin solid #333;
            background-color:#CCC;
            width:100%;
        }
        .Item {
            float: left;
            width: 230px;
            margin:5px;
            border: 1px solid #CCC;
            /*position:absolute;*/
        }
        #loading {
            display:none;
        }
    #ProductPager {
        display:none;
        margin-left:auto;
        margin-right:auto;
        width:500px;
    }
</style>
}

 <div id="bodyContent">
   <div id="head" class="GreyBlock">
     <h1>Head</h1>
   </div>
   
   <div>
           <!--Left-->
       <div id="LefMenue" class="GreyBlock">
         <ul>
           <li>1</li>
           <li>2</li>
           <li>3</li>
         </ul>
       </div>
       <!----right-->
       <div id="RightContent">
             <div id="ProductList">
                 @foreach (int item in Model)
                 {
                   <div class="Item">
                       <dl>
                           <dt>
                               <img src="~/Content/Shose.jpg" /></dt>
                           <dd>What's up with you @item</dd>
                        </dl>

                   </div> 
                 }
             </div>
           <div id="loading" class="Item">
                <span class="loading">加载中，请稍后...</span>
            </div>
     <div class="ClearBoth"></div>
     <div id="ProductPager">@Html.PagedListPager((PagedList.IPagedList)Model, x => Url.Action("Index", new {pageIndex=x}))</div>
       </div>
   </div>

   <div class="ClearBoth"></div>
   <div id="Footer" class="GreyBlock"></div>
 </div>





@section scripts{
    <script type="text/javascript">
      
        var myContainer = $("#ProductList");
        var requestIndex = 1;//每一页里的Ajax审请次数

            //用户拖动滚动条，达到底部时ajax加载一次数据
            var loading = $("#loading").data("on", false);//通过给loading这个div增加属性on，来判断执行一次ajax请求

            $(window).scroll(function () {
                if ($("#loading").data("on"))//
                {
                    return;
                }

                var isButtom = $(document).scrollTop() > ($(document).height() - $(window).height() - $("#Footer").height());
                if (isButtom) {//页面拖到底部了
                    //加载更多数据
                    loading.data("on", true).fadeIn();

                    requestIndex++;
                    $.get("@Url.Action("GetData", "Product", new { pageIndex=Request.QueryString["pageIndex"]==null?"1":Request.QueryString["pageIndex"].ToString()})" + "&requestIndex=" + requestIndex, function (data) {
                        var html = CreateHtml(data);
                        var $newElems = $(html).css({ opacity: 0 }).appendTo(myContainer);
                        $newElems.animate({ opacity: 1 },3000);
                        loading.data("on", false);
                        loading.fadeOut();
                        ShowProductPager();
                    },"json");
                }
            });


            function CreateHtml(data) {
                var html = "";
                if ($.isArray(data)) {
                    for (var i in data) {
                        html += "<div class=\"Item\">";
                        html += "<dl>";
                        html += "<dt>";
                        html += "<img src=\"../Content/Shose.jpg\" />";
                        html += "</dt>";
                        html += "<dd>";
                        html += "What's up with you " + data[i];
                        html += "</dd>"
                        html += "</dl>"
                        html += "</div>"
                    }
                }
                return html;
            }

            function ShowProductPager() {
                var loadedCount = parseInt("@Model.PageSize");
                var itemCount = $("#ProductList>div").length;
                if (itemCount >= loadedCount) {
                    loading.data("on", true);
                    loading.fadeOut();
                    $("#ProductPager").fadeIn();
                }
            }
    </script>
    }

View Code

C# Controller

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace NationalUnion.Member.Controllers
{
    public class ProductController : Controller
    {
       const int AJAXSIZE = 10;//每次Ajax读取的个数
       const int WATERFALLSIZE = 30;//瀑布流每页显示的个数

        [HttpGet]
        public ActionResult Index(int pageIndex=1)
        {
            int vTotalCount = 0;

            List<int> vListData = GetPageData(pageIndex, out vTotalCount);

            PagedList.StaticPagedList<int> vPageData = new PagedList.StaticPagedList<int>(vListData, pageIndex, WATERFALLSIZE, vTotalCount);
            return View(vPageData);
        }

        /// <summary>
        /// 得到分页数据
        /// </summary>
        /// <param name="argPageIndex"></param>
        /// <param name="argTotalCount"></param>
        /// <returns></returns>
        [NonAction]
        List<int> GetPageData(int argPageIndex,out int argTotalCount)
        {
            List<int> vListData = DataSource();
            argTotalCount = vListData.Count();
            return vListData.Skip((argPageIndex - 1) * WATERFALLSIZE).Take(AJAXSIZE).ToList();
        }

        /// <summary>
        /// 构造数据源
        /// </summary>
        /// <returns></returns>
        [NonAction]
        List<int> DataSource()
        {
            Random ro = new Random();

            List<int> vListInt = new List<int>();
            for (int i = 1; i <= 150; i++)
            {
                vListInt.Add(i);
            }
            return vListInt;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="pageIndex"></param>
        /// <returns></returns>
        public JsonResult GetData(int pageIndex = 1, int requestIndex = 1)
        {
            Random ro = new Random();
            List<int> vListData = DataSource();
            List<int> vJsonData = vListData.Skip((pageIndex - 1) * WATERFALLSIZE + (requestIndex - 1) * AJAXSIZE).Take(AJAXSIZE).ToList();
            return Json(vJsonData, JsonRequestBehavior.AllowGet);
        }

        public ActionResult ShareProduct()
        {
            return View();
        }

    }
}

View Code

 最后生成的效图