javascript;Jquery;获取JSON对象，无刷新分页，异步加载，异步删除，实例。
AjaxNewsList:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<style type="text/css">
.auto-style1 {
width: 230px;
}
.auto-style2 {
width: 300px;
}
.auto-style3 {
width: 35px;
}
.auto-style6 {
width: 80px;
}
.auto-style7 {
width: 100px;
}
</style>
<script type="text/javascript">
window.onload = function () {
initNews(1);
};
function initNews(pageindex) {
var xhr = null;
if (typeof (XMLHttpRequest) != undefined) {
xhr = new XMLHttpRequest();
}
else {
xhr = new ActiveXObject("Microsoft.XMLHttp");
}
xhr.onreadystatechange = function () {
if (xhr.readyState == 4 && xhr.status == 200) {
//把json字符串转换为json对象。（不安全，这里最好用json2.js或jquery）
//var newsList = eval("(" + xhr.responseText + ")");
var data = JSON.parse(xhr.responseText); //IE8之前需要引用json2.js
//设置分页超链接。
document.getElementById("div_PageNavigate").innerHTML = data.pageNavigate;
//注册a超链接onclick事件
var links = document.getElementById("div_PageNavigate").getElementsByTagName("a");
for (var a in links) {
links[a].onclick = function () {
window.location = '#p' + this.href.substr(this.href.lastIndexOf('/') + 1); //修改地址栏url，不重载页面。
initNews(this.href.substr(this.href.lastIndexOf('/')+1)); //取超链接‘/’后面的数字 仿博客园无刷新分页。
return false;
};
}
var newsList = data.dataList;
var tbody = document.getElementById("tbodyContent"); //获取tbody对象
//先清空tbody
tbody.innerHTML = "";
for (var i = 0; i < newsList.length; i++) {
var tr = document.createElement("tr"); //创建tr
//{"NewsId":25,
//"NewsTitle":"第一条国际新闻",
//"NewsContent":"新闻内容，新闻内容，新闻内容，新闻内容，新闻内容，新闻内容，新闻内容",
//"NewsIssueDate":"\/Date(1414078309687)\/",
//"NewsAuthor":"admin",
//"NewsImage":"Upload/BigPic/5/1/12/dcae98a1-a920-42b2-9e2d-c9896c8977dc_25.jpg",
//"NewsSmallImage":"Upload/SmallPic/5/1/12/dcae98a1-a920-42b2-9e2d-c9896c8977dc_small25.jpg",
//"NewsType":{"TypeId":2,
//"TypeName":"国际新闻"}
for (var name in newsList[i]) {
var td = document.createElement("td"); //创建td
var value = newsList[i][name];
if (name == "NewsId") { //Id
td.innerHTML = value;
}
else if (name == "NewsTitle") { //标题
td.innerHTML = value.length < 50 ? value : value.substring(0, 47) + "...";
}
else if (name == "NewsContent") { //内容
td.innerHTML = value.length < 80 ? value : value.substring(0, 77) + "...";
}
else if (name == "NewsIssueDate") { //日期
var da = eval('new ' + value.replace('/', '', 'g'));
td.innerHTML = da.toLocaleDateString();
}
else if (name == "NewsAuthor") { //作者
td.innerHTML = value;
}
else if (name == "NewsSmallImage") { //图片
td.innerHTML = "<img width=\"100\" height=\"100\" src=\"" + value + "\" />";
}
else if (name == "NewsType") { //新闻类别
td.innerHTML = value.TypeName;
}
else {
continue; //排除剩余的
}
tr.appendChild(td); //附加到tr节点
}
//添加编辑和删除
var td = document.createElement("td");
td.innerHTML = "<a href=\"EditNews.aspx?NewsId"] + "\">编辑</a>";
tr.appendChild(td);
var td = document.createElement("td");
td.innerHTML = "<a sNewsId"] + " class=\"deleteClass\" href=\"javascript:void(0);\" >删除</a>";
tr.appendChild(td);
tbody.appendChild(tr); //附加到tbody节点
}
//绑定删除事件
initDeleteEvents(pageindex);
}
};
xhr.open("Get", "GetNews.ashx?pageindex=" + pageindex, true);
xhr.send(null);
}
//给删除超链接绑定onclick事件。
function initDeleteEvents(pageindex) {
var classNames = document.getElementsByClassName("deleteClass");
for (var a in classNames) {
classNames[a].onclick = function () {
if (window.confirm('真的要删除吗？')) {
//异步请求执行删除
var xhr = null;
if (typeof (XMLHttpRequest) != undefined) {
xhr = new XMLHttpRequest();
}
else {
xhr = new ActiveXObject("Microsoft.XMLHttp");
}
xhr.onreadystatechange = function () {
if (xhr.readyState == 4 && xhr.status == 200) {
var _data = xhr.responseText;
if (_data == "1") {
//重新异步加载数据
initNews(pageindex);
alert("删除成功！");
}
}
};
xhr.open("Get", "AjaxDeleteNews.ashx?sid"), true);
xhr.send(null);
}
};
}
}
</script>
</head>
<body>
<!--#include file="Top.html"-->
<div>
<table >
<tr>
<td class="auto-style3">Id</td>
<td class="auto-style1">标题</td>
<td class="auto-style2">内容</td>
<td class="auto-style6">日期</td>
<td class="auto-style6">作者</td>
<td class="auto-style7">图片</td>
<td class="auto-style6">新闻类别</td>
<td>编辑</td>
<td>删除</td>
</tr>
<tbody ></tbody>
</table>
<div ></div>
</div>
</body>
</html>GetNews.ashx:
<%@ WebHandler Language="C#" Class="GetNews" %>
using System;
using System.Web;
using System.Web.Script.Serialization;
public class GetNews : IHttpHandler {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
int pageindex = context.Request["pageindex"] == null ? 1 : int.Parse(context.Request["pageindex"]);
int intPageSizes = 5;
int recordCount;
int pageCount;
System.Collections.Generic.List<News.Model.Aspx_News> newsList = new News.BLL.Aspx_NewsBll().GetNewsListByPage(intPageSizes, pageindex, out recordCount, out pageCount);
//生成分页超链接字符串。"GetNews.ashx?pageindex="
string _pageNavigate = PageClass.strPage(recordCount, intPageSizes, pageCount, pageindex, "p/"); //主要用到p/截取字符串取后面数字。
var data = new { pageNavigate = _pageNavigate, dataList = newsList };
JavaScriptSerializer jsSerializer = new JavaScriptSerializer();
string json = jsSerializer.Serialize(data);
context.Response.Write(json);
}
public bool IsReusable {
get {
return false;
}
}
}Jqurey版：
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<script src="../Scripts/jquery-1.7.1.js"></script>
<style type="text/css">
.auto-style1 {
width: 230px;
}
.auto-style2 {
width: 300px;
}
.auto-style3 {
width: 35px;
}
.auto-style6 {
width: 80px;
}
.auto-style7 {
width: 100px;
}
</style>
<script type="text/javascript">
$(function () {
initNews(1);
});
function initNews(pageindex) {
$.getJSON("GetNews.ashx", { "pageindex": pageindex }, function (_data) {
//设置分页超链接。
$("#div_PageNavigate").html(_data.pageNavigate);
//注册a超链接onclick事件
$("#div_PageNavigate a").click(function () {
window.location = '#p' + this.href.substr(this.href.lastIndexOf('/') + 1); //修改地址栏url，不重载页面。
initNews(this.href.substr(this.href.lastIndexOf('/') + 1)); //取超链接‘/’后面的数字 仿博客园无刷新分页。
return false;
});
var newsList = _data.dataList;
$("#tbodyContent").empty(); //先清空tbody
$.each(newsList, function (key, value) {
var id = value.NewsId;
var title = value.NewsTitle.length < 50 ? value.NewsTitle : value.NewsTitle.substring(0, 47) + "...";
var content = value.NewsTitle.length < 80 ? value.NewsTitle : value.NewsTitle.substring(0, 77) + "...";
var issueDate = eval('new ' + value.NewsIssueDate.replace('/', '', 'g')).toLocaleDateString();
var author = value.NewsAuthor;
var smallImage = "<img width=\"100\" height=\"100\" src=\"" + value.NewsSmallImage + "\" />";
var type = value.NewsType.TypeName;
var edit = "<a href=\"EditNews.aspx?\">编辑</a>";
var del = "<a s class=\"deleteClass\" href=\"javascript:void(0);\" >删除</a>";
//创建TR
var tr = $("<tr><td>" + id + "</td><td>" + title + "</td><td>" + content + "</td><td>" + issueDate + "</td><td>" + author + "</td><td>" + smallImage + "</td><td>" + type + "</td><td>" + edit + "</td><td>" + del + "</td></tr>");
$("#tbodyContent").append(tr);
});
//绑定删除事件
initDeleteEvents(pageindex);
});
}
//给删除超链接绑定onclick事件。
function initDeleteEvents(pageindex) {
$("a.deleteClass").click(function () {
if (window.confirm('真的要删除吗？')) {
//异步请求执行删除
$.get("AjaxDeleteNews.ashx", { id: $(this).attr("sid") }, function (_data) {
if (_data == "1") {
//重新异步加载数据
initNews(pageindex);
alert("删除成功！");
}
});
}
});
}
</script>
</head>
<body>
<!--#include file="Top.html"-->
<div>
<table >
<tr>
<td class="auto-style3">Id</td>
<td class="auto-style1">标题</td>
<td class="auto-style2">内容</td>
<td class="auto-style6">日期</td>
<td class="auto-style6">作者</td>
<td class="auto-style7">图片</td>
<td class="auto-style6">新闻类别</td>
<td>编辑</td>
<td>删除</td>
</tr>
<tbody ></tbody>
</table>
<div ></div>
</div>
</body>
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