asp.net中利用Jquery+Ajax+Json实现无刷新分页(二)

浏览数：47 / 时间：2015年06月09日

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="PageTest.aspx.cs" Inherits="renmai_PageTest" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Jquery+Ajax分页测试</title>
    <script src="../js/jquery-1.11.1.min.js" type="text/javascript"></script>
    <script type="text/javascript">
        $(function () {
            InitPage(1, 10);
            $(".nextPage").click(function () {
                InitPage($("#nextpage").val(), 10);
            });
        });
        //请求数据
        function InitPage(pageIndex, pageSize) {
            $.ajax({
                type: "POST",
                dataType: "json",
                url: '/Handler/Handler1.ashx',
                data: "type=show&random=" + Math.random() + "&pageIndex=" + pageIndex + "&pageSize=" + pageSize,
                error: function () { alert('error data'); },  //错误执行方法    
                success: function (data) {
                    var json = data; //数组
                    var recordCount = json.table2[0].recordcount;
                    var html = "";
                    $.each(json.table1, function (index, item) {
                        //循环获取数据    
                        var id = item.Id;
                        var name = item.Name;
                        var sex = item.Sex;
                        html += "<tr><td>" + id + "</td><td>" + name + "</td><td>" + sex + "</td></tr>";
                    });
                    $("#Result").append(html);
                    $("#nextpage").val(parseInt(pageIndex) + 1);
                }
            });
        };    
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <input type="hidden" id="nextpage" value="1" />
    <table id="Result" cellspacing="0" cellpadding="0">  
        <tr>  
            <th style="width:50px;">  
                编号  
            </th>  
            <th style="width:100px;">  
                姓名  
            </th>  
            <th style="width:50px;">  
                性别  
            </th>  
        </tr>  
    </table> 
    <a href="javascript:void(0)" class="nextPage">下一页</a>     
    </div>
    </form>
</body>
</html>

<%@ WebHandler Language="C#" Class="Handler1" %>

using System;
using System.Web;
using System.Data;
using Newtonsoft.Json;

public class Handler1 : IHttpHandler {
    /*  Handler/Handler1.ashx */
    protected static int RecordCount = 0;
    protected static DataTable dt = CreateDT(); 
    public void ProcessRequest (HttpContext context) {
        string type=context.Request["type"];
        int pageIndex = MSCL.ConvertHelper.ObjectToInt(context.Request["pageIndex"]);
        int pageSize = MSCL.ConvertHelper.ObjectToInt(context.Request["pageSize"]);
        switch (type)
        {
            case "show":
                #region 分页配置
                if (pageIndex == 0) { pageIndex = 1; }
                #endregion
                
                DataSet ds = new DataSet();
                DataTable dtData = GetPagedTable(dt, pageIndex, pageSize);
                dtData.TableName = "table1";
                
                DataTable dtCount = new DataTable();
                dtCount.TableName = "table2";
                dtCount.Columns.Add("recordcount");
                dtCount.Rows.Add(dt.Rows.Count);

                ds.Tables.Add(dtData);
                ds.Tables.Add(dtCount);

                string json = JsonConvert.SerializeObject(ds, Formatting.Indented);
                context.Response.Write(json);
                break;
            default :
                break;
        }
        context.Response.End();  
    }

    #region 模拟数据
    private static DataTable CreateDT()
    {
        DataTable dt = new DataTable();
        dt.Columns.Add(new DataColumn("Id", typeof(int)) { DefaultValue = 0 });
        dt.Columns.Add(new DataColumn("Name", typeof(string)) { DefaultValue = "1" });
        dt.Columns.Add(new DataColumn("Sex", typeof(string)) { DefaultValue = "男" });
        for (int i = 1; i <= 1000; i++)
        {
            dt.Rows.Add(i, "张三" + i.ToString().PadLeft(4, '0'));
        }
        RecordCount = dt.Rows.Count;
        return dt;
    }
    #endregion 
    
    /// <summary>    
    /// 对DataTable进行分页,起始页为1    
    /// </summary>    
    /// <param name="dt"></param>    
    /// <param name="PageIndex"></param>    
    /// <param name="PageSize"></param>    
    /// <returns></returns>    
    public static DataTable GetPagedTable(DataTable dt, int PageIndex, int PageSize)
    {
        if (PageIndex == 0)
            return dt;
        DataTable newdt = dt.Copy();
        newdt.Clear();
        int rowbegin = (PageIndex - 1) * PageSize;
        int rowend = PageIndex * PageSize;
        if (rowbegin >= dt.Rows.Count)
            return newdt;
        if (rowend > dt.Rows.Count)
            rowend = dt.Rows.Count;
        for (int i = rowbegin; i <= rowend - 1; i++)
        {
            DataRow newdr = newdt.NewRow();
            DataRow dr = dt.Rows[i];
            foreach (DataColumn column in dt.Columns)
            {
                newdr[column.ColumnName] = dr[column.ColumnName];
            }
            newdt.Rows.Add(newdr);
        }
        return newdt;
    }

    /// <summary>    
    /// 获取总页数    
    /// </summary>    
    /// <param name="sumCount">结果集数量</param>    
    /// <param name="pageSize">页面数量</param>    
    /// <returns></returns>    
    public static int getPageCount(int sumCount, int pageSize)
    {
        int page = sumCount / pageSize;
        if (sumCount % pageSize > 0)
        {
            page = page + 1;
        }
        return page;
    }    
    
    
    public bool IsReusable {
        get {
            return false;
        }
    }

}