写在前面
在项目中,用到单页应用的分页,当时想到使用滚动加载的方案,可是几次尝试都没配置成功,闲着无聊就弄了一个demo。
系列文章
[Angularjs]ng-select和ng-options
[Angularjs]ng-class,ng-class-even,ng-class-odd
一个例子
这里需要用到infinite-scroll,可以去这里下载:http://sroze.github.io/ngInfiniteScroll/index.html
Html
<!DOCTYPE html>
<html ng-app="myapp">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>滚动分页</title>
<meta charset="utf-8" />
<script src="JS/jquery.js"></script>
<script src="JS/angular.js"></script>
<script src="JS/ng-infinite-scroll.js"></script> <script>
var app = angular.module('myapp', ['infinite-scroll']);
app.controller('PersonController', function ($scope, $http) { $scope.data = {
busy: false,
users: [],
page:
};
//加载更多
$scope.loadMore = function () {
//是否正在加载
if ($scope.data.busy) {
return;
}
$scope.data.busy = true;
$http.get("/Service/UserInfo.ashx?page=" + $scope.data.page).success(function (data) {
console.log(data);
for (var i = ; i < data.length; i++) {
$scope.data.users.push(data[i]);
}
});
$scope.data.busy = false;
$scope.data.page++;
}
});
//过滤器
app.filter('toGenderString', function () {
return function (input) {
if (input) {
return '男';
} else {
return '女';
}
};
});
//将json格式的时间转换成一般时间
app.filter('formatDate', function () {
return function (jsondate) {
jsondate = jsondate.replace("/Date(", "").replace(")/", "");
if (jsondate.indexOf("+") > ) {
jsondate = jsondate.substring(, jsondate.indexOf("+"));
} else if (jsondate.indexOf("-") > ) {
jsondate = jsondate.substring(, jsondate.indexOf("-"));
}
var date = new Date(parseInt(jsondate, ));
var month = date.getMonth() + < ? "" + (date.getMonth() + ) : date.getMonth() + ;
var currentDate = date.getDate() < ? "" + date.getDate() : date.getDate();
return date.getFullYear() + "-" + month + "-" + currentDate; };
});
</script>
<style type="text/css">
* {
margin: ;
padding: ;
} div {
width: %;
border: 1px solid #0094ff;
text-align: center;
} table {
margin: 3px auto;
border: 0px solid #0094ff;
} td {
height: 30px;
}
</style>
</head>
<body>
<div ng-controller="PersonController"> <div infinite-scroll="loadMore()" infinite-scroll-disabled='data.busy' infinite-scroll-distance=''>
<table cellpadding="" cellspacing="" border="">
<tr><th>序号</th><th>姓名</th><th>创建时间</th><th>性别</th></tr>
<tr ng-repeat="user in data.users">
<td>{{user.ID}}</td>
<td>{{user.Name}} </td>
<td>{{user.CreateDate|formatDate}}</td>
<td>{{user.Gender|toGenderString}}</td>
</tr>
</table>
</div>
</div>
</body>
</html>
一般处理程序
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Caching;
using System.Web.Script.Serialization; namespace Wolfy.AngularJs.Service
{
/// <summary>
/// UserInfo 的摘要说明
/// </summary>
public class UserInfo : IHttpHandler
{ public void ProcessRequest(HttpContext context)
{
int page = Convert.ToInt32(context.Request["page"]);
int pageSize = ;
context.Response.ContentType = "application/json";
List<Person> lstPersons = null;
var obj = context.Cache.Get("persons");
if (obj == null)
{
lstPersons = new List<Person>();
for (int i = ; i < ; i++)
{
lstPersons.Add(new Person()
{
ID = i + ,
Gender = i % == ? true : false,
Name = "wolfy" + (i + ).ToString()
});
}
context.Cache.Insert(
"persons",
lstPersons,
null,
DateTime.Now.AddSeconds(),
Cache.NoSlidingExpiration,
CacheItemPriority.Low,
CacheItemRemovedCallback);
}
else
{
lstPersons = obj as List<Person>;
} JavaScriptSerializer jss = new JavaScriptSerializer();
//分页
var pageList = lstPersons.Skip(pageSize * (page - )).Take(pageSize);
string json = jss.Serialize(pageList);
context.Response.Write(json);
}
//这个为缓存移除时的回调函数,一定要保持与 Cache.Insert()方法中的最后一个参数名字一致,
//这里使用了委托,你可以在 Cache.Insert()这个函数中转定义看到的,所以这里的格式就只能按我写的这种方法签名写。
public static void CacheItemRemovedCallback(string key, object value, CacheItemRemovedReason reason) { } public bool IsReusable
{
get
{
return false;
}
}
}
public class Person
{
/// <summary>
/// 编号
/// </summary>
public int ID { set; get; }
/// <summary>
/// 姓名
/// </summary>
public string Name { set; get; }
/// <summary>
/// 创建时间
/// </summary>
public DateTime CreateDate { set; get; } = DateTime.Now;
/// <summary>
/// 性别,true 男 false 女
/// </summary>
public bool Gender { set; get; } = true; }
}
测试结果
总结
这是在项目中用到一种分页特效,在移动端还是用的比较多的,当时没有弄成功,就弄了一个简单的demo,进行了测试。当然,用个“加载更多”的按钮,也是一种解决方案。