ajax无刷新分页的简单实现

html>
head>
  title>/title>
      style type="text/css">
  table{ border:solid 1px #444; background-color:Aqua;}
  table td{border:solid 1px #444;}
  /style>
  script src="js/Jquery1.7.js" type="text/javascript">/script>
  script type="text/javascript">
    $(function () {
      var pageindex = 1;
      var pagesize = 10;
      /*如果将代码封装成一个函数，那么除非显示调用(loaddata())，否则函数中的代码不会执行
      根据传递的页码和每页显示的记录数量获取数据
      */
      function loaddata() {
        $.ajax({
          type: "post",
          contentType: "application/json",
          url: "WebService1.asmx/GetListAjax",
          data: "{pagesize:" + pagesize + ",pageindex:" + pageindex + "}",
          success: function (result) {
            //处理返回来的数据
            var strtable = 'table>';
            strtable += 'tr>td>编号/td>td>标题/td>td>内容/td>td>创建时间/td>/tr>';
            for (var i = 0; i  result.d.length; i++) {


              strtable += 'tr>';
              strtable += 'td>' + result.d[i].Id + '/td>';
              strtable += 'td>' + result.d[i].NewsTitle + '/td>';
              strtable += 'td>' + result.d[i].NewsContent + '/td>'
              strtable += 'td>' + result.d[i].CreateTime + '/td>';
              strtable += '/tr>';
            }
            strtable += '/table>';
            $('#mydiv').html(strtable);
          }


        })


      }
      //根据传递到后台的每页显示的记录数量来获取最大的页码(就是一共有多少页)
      $.ajax({
        type: "post",
        contentType: "application/json",
        url: "WebService1.asmx/GetLastPageindex",
        data: "{pagesize:" + pagesize + "}",
        success: function (result) {
          lastpageindex = result.d;
        }
      })


      //显式调用函数，在页面初次加载时加载第一页数据
      loaddata();
      //下一页
      $('a:eq(2)').click(function () {
        if (pageindex  lastpageindex) {
          pageindex++;
          loaddata();
        }


      })
      //上一页
      $('a:eq(1)').click(function () {
        if (pageindex > 1) {
          pageindex--;
          loaddata();
        }
      })
      //第一页
      $('a:first').click(function () {
        pageindex = 1;
        loaddata();
      })
      //最后一页
      $('a:eq(3)').click(function () {
        pageindex = lastpageindex;
        loaddata();
      })
      $('a:last').click(function () {
        pageindex = $('#txtPageindex').val();
        loaddata();
      })
    })
  
  /script>
/head>
body>
div id="mydiv">
/div>
div>a href="#">第一页/a>a href="#">上一页/a>a href="#">下一页/a>a href="#">最后一页/a>input
    id="txtPageindex" type="text" />a href="#">Go/a>/div>
/body>
/html>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Data;


namespace 分页
{
  /// summary>
  /// WebService1 的摘要说明
  /// /summary>
  [WebService(Namespace = "http://tempuri.org/")]
  [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
  [System.ComponentModel.ToolboxItem(false)]
  // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
  [System.Web.Script.Services.ScriptService]
  public class WebService1 : System.Web.Services.WebService
  {


    [WebMethod]
    public string HelloWorld()
    {
      return "Hello World";
    }
    [WebMethod]
    public ListModel.T_News1> GetListAjax(int pagesize,int pageindex)
    {
      BLL.T_News1 bnews = new BLL.T_News1();
      DataTable dt = bnews.GetListDataTable(pagesize,pageindex);
      ListModel.T_News1> list = new ListModel.T_News1>();
      int Id;
      string newstitle = "";
      string newscontent = "";
      DateTime createtime;
      for (int i = 0; i  dt.Rows.Count; i++)
      {
        Id = Convert.ToInt32(dt.Rows[i]["Id"]);
        newstitle = dt.Rows[i]["NewsTitle"].ToString();
        newscontent = dt.Rows[i]["NewsContent"].ToString();
        createtime = Convert.ToDateTime(dt.Rows[i]["CreateTime"]);
        Model.T_News1 news = new Model.T_News1()
        {


          Id = Id,
          NewsTitle = newstitle,
          NewsContent = newscontent,
          CreateTime = createtime
        };
        list.Add(news);
      }
      return list;
        
    }
    [WebMethod]
    public int GetLastPageindex(int pagesize)
    {
      BLL.T_News1 bnews = new BLL.T_News1();
      int totalcount = bnews.GetRecordCount("");
      if (totalcount % pagesize == 0)
      {
        return totalcount / pagesize;
      }
      else
      {
        return totalcount / pagesize + 1;
      }
    }


  }
}