jQuery +ajax +json+实现分页
正文
首先我们创建一般处理程序，来读取数据库中内容，得到返回值.
创建文件，GetData.ashx.
我这里是用的存储过程，存储过程会再下面粘出来，至于数据只是实例，你们可根据需求自行读取数据
代码如下：
<%@ WebHandler Language="C#" Class="GetData"%>
using System;
using System.Web;
using System.Data.SqlClient;
using System.Data;
using System.Collections.Generic;
using System.Web.Script.Serialization;
publicclass GetData : IHttpHandler {
publicvoid ProcessRequest (HttpContext context) {
context.Response.ContentType ="text/plain";
var pageIndex = context.Request["PageIndex"];
string connectionString =@"Data Source=KUSE\SQLEXPRESS;Initial Catalog=bookshop;Integrated Security=True";
//判断当前索引存不存在，如果不存在则获取记录的总数。
if (string.IsNullOrEmpty(pageIndex))
{
//获取查询记录总数的sql语句
string sql ="select count(-1) from books";
int count =0;
int.TryParse(SqlHelper.ExecuteScalar(connectionString, System.Data.CommandType.Text, sql, null).ToString(), out count);
context.Response.Write(count);
context.Response.End();
}
//当根据索引获取数据
else
{
int currentPageIndex =1;
int.TryParse(pageIndex, out currentPageIndex);
SqlParameter[] parms =new SqlParameter[] {
new SqlParameter("@FEILDS",SqlDbType.NVarChar,1000),
new SqlParameter("@PAGE_INDEX",SqlDbType.Int,10),
new SqlParameter("@PAGE_SIZE",SqlDbType.Int,10),
new SqlParameter("@ORDERTYPE",SqlDbType.Int,2),
new SqlParameter("@ANDWHERE",SqlDbType.VarChar,1000),
new SqlParameter("@ORDERFEILD",SqlDbType.VarChar,100)
};
parms[0].Value ="*";//获取所有的字段
parms[1].Value = pageIndex;//当前页面索引
parms[2].Value =10;//页面大小
parms[3].Value =0;//升序排列
parms[4].Value ="";//条件语句
parms[5].Value ="ID";//排序字段
List<Book> list =new List<Book>();
using (SqlDataReader sdr = SqlHelper.ExecuteReader(connectionString, CommandType.StoredProcedure, "PAGINATION", parms))
{
while (sdr.Read())
{
list.Add(new Book { Title = sdr[2].ToString(), Auhor = sdr[2].ToString(), PublishDate = sdr[4].ToString(), ISBN = sdr[5].ToString() });
}
}
context.Response.Write(new JavaScriptSerializer().Serialize(list).ToString());//转为Json格式
}
}
publicbool IsReusable {
get {
returnfalse;
}
}
}
publicclass Book
{
publicstring Title { get; set; }
publicstring Auhor { get; set; }
publicstring PublishDate { get; set; }
publicstring ISBN { get; set; }
}
复制代码
显示数据页面----异步请求获取数据，基于jquery
创建页面Show.htm
<body>
<div >
<table id="content">/*显示数据内容*/
</table>
<div id="pager" class="yahoo2"></div>/*显示分页条*/
</div>
</body>
js代码
$(function () {
$.post("GetData.ashx", null, function (data) {
var total = data;
PageClick(1, total, 3);
});
PageClick = function (pageIndex, total, spanInterval) {
$.ajax({
url: "GetData.ashx",
data: { "PageIndex": pageIndex },
type: "post",
dataType: "json",
success: function (data) {
//索引从1开始
//将当前页索引转为int类型
var intPageIndex = parseInt(pageIndex);
//获取显示数据的表格
var table = $("#content");
//清楚表格中内容
$("#content tr").remove();
//向表格中添加内容
for (var i =0; i < data.length; i++) {
table.append(
$("<tr><td>"+
data[i].Title
+"</td><td>"+
data[i].Auhor
+"</td><td>"+
data[i].PublishDate
+"</td><td>"+
data[i].ISBN
+"</td></tr>")
);
} //for
//创建分页
//将总记录数结果 得到 总页码数
var pageS = total
if (pageS %10==0) pageS = pageS /10;
else pageS = parseInt(total /10) +1;
var $pager = $("#pager");
//清楚分页div中的内容
$("#pager span").remove();
$("#pager a").remove();
//添加第一页
if (intPageIndex ==1)
$pager.append("<span class='disabled'>第一页</span>");
else {
var first = $("<a href='javascript:void(0)' first='"+1+"'>第一页</a>").click(function () {
PageClick($(this).attr('first'), total, spanInterval);
returnfalse;
});
$pager.append(first);
}
//添加上一页
if (intPageIndex ==1)
$pager.append("<span class='disabled'>上一页</span>");
else {
var pre = $("<a href='javascript:void(0)' pre='"+ (intPageIndex -1) +"'>上一页</a>").click(function () {
PageClick($(this).attr('pre'), total, spanInterval);
returnfalse;
});
$pager.append(pre);
}
//设置分页的格式 这里可以根据需求完成自己想要的结果
var interval = parseInt(spanInterval); //设置间隔
var start = Math.max(1, intPageIndex - interval); //设置起始页
var end = Math.min(intPageIndex + interval, pageS)//设置末页
if (intPageIndex < interval +1) {
end = (2* interval +1) > pageS ? pageS : (2* interval +1);
}
if ((intPageIndex + interval) > pageS) {
start = (pageS -2* interval) <1?1 : (pageS -2* interval);
}
//生成页码
for (var j = start; j < end +1; j++) {
if (j == intPageIndex) {
var spanSelectd = $("<span class='current'>"+ j +"</span>");
$pager.append(spanSelectd);
} //if
else {
var a = $("<a href='javascript:void(0)'>"+ j +"</a>").click(function () {
PageClick($(this).text(), total, spanInterval);
returnfalse;
});
$pager.append(a);
} //else
} //for
//上一页
if (intPageIndex == total) {
$pager.append("<span class='disabled'>下一页</span>");
}
else {
var next = $("<a href='javascript:void(0)' next='"+ (intPageIndex +1) +"'>下一页</a>").click(function () {
PageClick($(this).attr("next"), total, spanInterval);
returnfalse;
});
$pager.append(next);
}
//最后一页
if (intPageIndex == pageS) {
$pager.append("<span class='disabled'>最后一页</span>");
}
else {
var last = $("<a href='javascript:void(0)' last='"+ pageS +"'>最后一页</a>").click(function () {
PageClick($(this).attr("last"), total, spanInterval);
returnfalse;
});
$pager.append(last);
}
} //sucess
}); //ajax
}; //function
}); //ready
分页样式
<style type="text/css">
DIV.yahoo2 {
PADDING-RIGHT: 3px; PADDING-LEFT: 3px; FONT-SIZE: 0.85em; PADDING-BOTTOM: 3px; MARGIN: 3px; PADDING-TOP: 3px; FONT-FAMILY: Tahoma,Helvetica,sans-serif; TEXT-ALIGN: center
}
DIV.yahoo2 A {
BORDER-RIGHT: #ccdbe4 1px solid; PADDING-RIGHT: 8px; BACKGROUND-POSITION: 50% bottom; BORDER-TOP: #ccdbe4 1px solid; PADDING-LEFT: 8px; PADDING-BOTTOM: 2px; BORDER-LEFT: #ccdbe4 1px solid; COLOR: #0061de; MARGIN-RIGHT: 3px; PADDING-TOP: 2px; BORDER-BOTTOM: #ccdbe4 1px solid; TEXT-DECORATION: none
}
DIV.yahoo2 A:hover {
BORDER-RIGHT: #2b55af 1px solid; BORDER-TOP: #2b55af 1px solid; BACKGROUND-IMAGE: none; BORDER-LEFT: #2b55af 1px solid; COLOR: #fff; BORDER-BOTTOM: #2b55af 1px solid; BACKGROUND-COLOR: #3666d4
}
DIV.yahoo2 A:active {
BORDER-RIGHT: #2b55af 1px solid; BORDER-TOP: #2b55af 1px solid; BACKGROUND-IMAGE: none; BORDER-LEFT: #2b55af 1px solid; COLOR: #fff; BORDER-BOTTOM: #2b55af 1px solid; BACKGROUND-COLOR: #3666d4
}
DIV.yahoo2 SPAN.current {
PADDING-RIGHT: 6px; PADDING-LEFT: 6px; FONT-WEIGHT: bold; PADDING-BOTTOM: 2px; COLOR: #000; MARGIN-RIGHT: 3px; PADDING-TOP: 2px
}
DIV.yahoo2 SPAN.disabled {
DISPLAY: none
}
DIV.yahoo2 A.next {
BORDER-RIGHT: #ccdbe4 2px solid; BORDER-TOP: #ccdbe4 2px solid; MARGIN: 0px 0px 0px 10px; BORDER-LEFT: #ccdbe4 2px solid; BORDER-BOTTOM: #ccdbe4 2px solid
}
DIV.yahoo2 A.next:hover {
BORDER-RIGHT: #2b55af 2px solid; BORDER-TOP: #2b55af 2px solid; BORDER-LEFT: #2b55af 2px solid; BORDER-BOTTOM: #2b55af 2px solid
}
DIV.yahoo2 A.prev {
BORDER-RIGHT: #ccdbe4 2px solid; BORDER-TOP: #ccdbe4 2px solid; MARGIN: 0px 10px 0px 0px; BORDER-LEFT: #ccdbe4 2px solid; BORDER-BOTTOM: #ccdbe4 2px solid
}
DIV.yahoo2 A.prev:hover {
BORDER-RIGHT: #2b55af 2px solid; BORDER-TOP: #2b55af 2px solid; BORDER-LEFT: #2b55af 2px solid; BORDER-BOTTOM: #2b55af 2px solid
}
</style>
分页存储过程---PAGINATION
CREATE PROCEDURE [dbo].[PAGINATION]
@FEILDS VARCHAR(1000),--要显示的字段
@PAGE_INDEX INT,--当前页码
@PAGE_SIZE INT,--页面大小
@ORDERTYPE BIT,--当为0时 则为 desc 当为1 时 asc
@ANDWHERE VARCHAR(1000)='',--where语句 不用加where
@ORDERFEILD VARCHAR(100) --排序的字段
as
DECLARE @EXECSQL VARCHAR(2000)
DECLARE @ORDERSTR VARCHAR(100)
DECLARE @ORDERBY VARCHAR(100)
BEGIN
set NOCOUNT on
IF @ORDERTYPE =1
BEGIN
SET @ORDERSTR =' > ( SELECT MAX(['+@ORDERFEILD+'])'
SET @ORDERBY ='ORDER BY '+@ORDERFEILD+' ASC'
END
ELSE
BEGIN
SET @ORDERSTR =' < ( SELECT MIN(['+@ORDERFEILD+'])'
SET @ORDERBY ='ORDER BY '+@ORDERFEILD+' DESC'
END
IF @PAGE_INDEX =1--当页码是第一页时直接运行，提高速度
BEGIN
IF @ANDWHERE=''
SET @EXECSQL ='SELECT TOP '+STR(@PAGE_SIZE)+''+@FEILDS+' FROM [books] '+@ORDERBY
ELSE
SET @EXECSQL ='SELECT TOP '+STR(@PAGE_SIZE)+''+@FEILDS+' FROM [books] WHERE '+@ANDWHERE+''+ @ORDERBY
END
ELSE
BEGIN
IF @ANDWHERE=''
BEGIN --以子查询结果当做新表时 要给表名别名才能用
SET @EXECSQL ='SELECT TOP'+STR(@PAGE_SIZE)+''+@FEILDS+' FROM [books] WHERE '+@ORDERFEILD+
@ORDERSTR+' FROM (SELECT TOP '+STR(@PAGE_SIZE*(@PAGE_INDEX-1))+''+@ORDERFEILD+
' FROM [books] '+@ORDERBY+') AS TEMP) '+ @ORDERBY
END
ELSE
BEGIN
SET @EXECSQL ='SELECT TOP'+STR(@PAGE_SIZE)+''+@FEILDS+' FROM [books] WHERE '+@ORDERFEILD+
@ORDERSTR+' FROM (SELECT TOP '+ STR(@PAGE_SIZE*(@PAGE_INDEX-1))+''+@ORDERFEILD+
' FROM [books] WHERE '+@ANDWHERE+''+@ORDERBY+') AS TEMP) AND '+@ANDWHERE+''+ @ORDERBY
END
END
EXEC (@EXECSQL)--这里要加括号
END
