关于ASP.net与AJAX用gridview进实现无刷新并分页随笔

开发环境:WIN XP   VS2005
数据库:SQL server 2000
此处不考虑安全问题.
具体如下:
首先建立一个数据库和一个表结构并在表中输入一些数据以便测试:此步略过
打开VS2005新建一个网站并添加一个HTML页
在默认的Default.aspx中放入Gridview控件用于显示数据
.cs代码
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
       public int j = 0;
    protected void Page_Load(object sender, EventArgs e)
    {
databind();
 }
/// <summary>
    /// 分页
    /// </summary>
    private void databind()
    {
        string connStrings = ConfigurationManager.ConnectionStrings["WSConStringSQL"].ToString();
        SqlConnection sqlconn = new SqlConnection(connStrings);
        SqlCommand sqlcom = new SqlCommand("Select * from TB_AdminUser ", sqlconn);
        
        DataSet ds = new DataSet();
  
        SqlDataAdapter da = new SqlDataAdapter(sqlcom);
        da.Fill(ds);
        PagedDataSource objPds = new PagedDataSource();
        objPds.DataSource = ds.Tables[0].DefaultView;
        objPds.AllowPaging = true;
        objPds.PageSize = 5;
        int CurPage;
      &