基于Jquery+Ajax+Json+高效分页

时间：2015-09-27 17:32:58 阅读：190 评论：0 收藏：0 [点我收藏+]

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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; }
}

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