asp.net中利用Jquery+Ajax+Json实现无刷新分页的实例代码_实用技巧

复制代码 代码如下:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="AjaxJson.aspx.cs" Inherits="AjaxJson" %>
<!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+Json分页</title>
    <meta http-equiv="content-type" content="text/html; charset=gb2312">
    <link href="Styles/tablecloth.css" rel="stylesheet" type="text/css" />
    <link href="Styles/pagination.css" rel="stylesheet" type="text/css" />

    <script type="text/javascript" src="Scripts/jquery-1.4.4.min.js"></script>
    <script type="text/javascript" src="Scripts/jquery.pagination.js"></script>
    <script type="text/javascript">
    var pageIndex = 0;     //页面索引初始值
    var pageSize = 10;     //每页显示条数初始化，修改显示条数，修改这里即可
    $(function () {
        InitTable(0);    //Load事件，初始化表格数据，页面索引为0（第一页）  
        //分页，PageCount是总条目数，这是必选参数，其它参数都是可选
        $("#Pagination").pagination(<%=pageCount %>, {
            callback: PageCallback,
            prev_text: '上一页',       //上一页按钮里text
            next_text: '下一页',       //下一页按钮里text
            items_per_page: pageSize,  //显示条数
            num_display_entries: 6,    //连续分页主体部分分页条目数
            current_page: pageIndex,   //当前页索引
            num_edge_entries: 2        //两侧首尾分页条目数
        });

        //翻页调用
        function PageCallback(index, jq) {
            InitTable(index);
        }

        //请求数据
        function InitTable(pageIndex) {
            $.ajax({
                type: "POST",
                dataType: "json",
                url: 'SupplyAJAX.aspx',      //提交到一般处理程序请求数据
                data: "type=show&random=" + Math.random() + "&pageIndex=" + (pageIndex + 1) + "&pageSize=" + pageSize, //提交两个参数：pageIndex(页面索引)，pageSize(显示条数)   
                error: function () { alert('error data'); },  //错误执行方法 
                success: function (data) {
                    $("#Result tr:gt(0)").remove();        //移除Id为Result的表格里的行，从第二行开始（这里根据页面布局不同页变）
                    var json = data; //数组
                    var html = "";
                    $.each(json.data, 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);             //将返回的数据追加到表格
                }
            });
        }
    });
    </script>

</head>
<body>
    <form id="form1" runat="server">
    <table id="Result" cellspacing="0" cellpadding="0">
        <tr>
            <th>
                编号
            </th>
            <th>
                姓名
            </th>
            <th>
                性别
            </th>
        </tr>
    </table>
    <div id="Pagination">
    </div>
    </form>
</body>
</html>

复制代码 代码如下:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;
using System.Net;
using System.IO;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class AjaxJson : System.Web.UI.Page
{
    public string pageCount = string.Empty; //总条目数

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            string url = "/SupplyAJAX.aspx";
            string strResult = GetRequestJsonString(url, "type=getcount");
            pageCount = strResult.ToString();
        }
    }

    #region 后台获取ashx返回的数据
    /// <summary>
    /// 后台获取ashx返回的数据
    /// </summary>
    /// <param name="relativePath">地址</param>
    /// <param name="data">参数</param>
    /// <returns></returns>
    public static string GetRequestJsonString(string relativePath, string data)
    {
        string requestUrl = GetRequestUrl(relativePath, data);

        try
        {
            WebRequest request = WebRequest.Create(requestUrl);
            request.Method = "GET";

            StreamReader jsonStream = new StreamReader(request.GetResponse().GetResponseStream());
            string jsonObject = jsonStream.ReadToEnd();

            return jsonObject;
        }
        catch
        {
            return string.Empty;
        }
    }

    public static string GetRequestUrl(string relativePath, string data)
    {
        string absolutePath = HttpContext.Current.Request.Url.AbsoluteUri;
        string hostNameAndPort = HttpContext.Current.Request.Url.Authority;
        string applicationDir = HttpContext.Current.Request.ApplicationPath;
        StringBuilder sbRequestUrl = new StringBuilder();
        sbRequestUrl.Append(absolutePath.Substring(0, absolutePath.IndexOf(hostNameAndPort)));
        sbRequestUrl.Append(hostNameAndPort);
        sbRequestUrl.Append(applicationDir);
        sbRequestUrl.Append(relativePath);
        if (!string.IsNullOrEmpty(data))
        {
            sbRequestUrl.Append("?");
            sbRequestUrl.Append(data);
        }
        return sbRequestUrl.ToString();
    }
    #endregion
}

复制代码 代码如下:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Web.UI;
using System.Web.UI.WebControls;
//新增  
using System.Web.Script.Serialization;
using System.Text;

public partial class SupplyAJAX : System.Web.UI.Page
{
    protected static List<Student> StudentList = new List<Student>();
    protected static int RecordCount = 0;
    protected static DataTable dt = CreateDT();
    protected void Page_Load(object sender, EventArgs e)
    {
        switch (Request["type"])
        {
            case "show":
                #region 分页配置
                //具体的页面数
                int pageIndex;
                int.TryParse(Request["pageIndex"], out pageIndex);
                //页面显示条数
                int PageSize = Convert.ToInt32(Request["pageSize"]);
                if (pageIndex == 0)
                {
                    pageIndex = 1;
                }
                #endregion
                DataTable PagedDT = GetPagedTable(dt, pageIndex, PageSize);
                List<Student> list = new List<Student>();
                foreach (DataRow dr in PagedDT.Rows)
                {
                    Student c = new Student();
                    c.Id = (Int32)dr["Id"];
                    c.Name = dr["Name"].ToString();
                    c.Sex = dr["Sex"].ToString();
                    list.Add(c); 
                }
                string json = new JavaScriptSerializer().Serialize(list);//这个很关键，否则error
                StringBuilder Builder = new StringBuilder();
                Builder.Append("{");
                Builder.Append("\"recordcount\":" + RecordCount + ",");
                Builder.Append("\"data\":");
                Builder.Append(json);
                Builder.Append("}");
                Response.ContentType = "application/json";
                Response.Write(Builder.ToString());
                break;
            case "getcount":
                Response.Write(dt.Rows.Count);
                break;
            case "add":
                break;
            case "update":
                break;
            case "delete":
                break;
        }
        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 struct Student
    {
        public int Id;
        public string Name;
        public string Sex;
    } 
}

时间： 2024-08-04 10:31:39

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