分页总是异常。

using System;using System.Collections;using System.Configuration;using System.Data;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;public partial class type_pro : System.Web.UI.Page{    protected void Page_Load(object sender, EventArgs e)    {        if (!IsPostBack)        {            bingrpt();        }    }    /// <summary>    /// 分类    /// </summary>    protected void bingrpt()    {        int id = Convert.ToInt32(Request.QueryString["id"].ToString());        string strqry = "";        strqry = "select * From T_PatentsType where id =" + id + "  order by id asc";        DataView dvlist = DBFun.GetDataView(strqry);        rpt_fenlei.DataSource = dvlist;        rpt_fenlei.DataBind();    }    /// <summary>    /// 子项绑定    /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    protected void rpt_fenlei_ItemDataBound(object sender, RepeaterItemEventArgs e)    {        if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)        {            Repeater rpt_info = (Repeater)e.Item.FindControl("rpt_info");            // 找到分类Repeater关联的数据项             DataRowView rowv = (DataRowView)e.Item.DataItem;            // 提取分类ID             int CategorieId = Convert.ToInt32(rowv["id"]);            //根据分类ID查询该分类下的产品，并绑定产品Repeater            string strqry = "";            strqry = "select top 20 * From T_Patents where typeid=" + CategorieId + " order by id desc";            DataView dvlist = DBFun.GetDataView(strqry);            rpt_info.DataSource = dvlist;            rpt_info.DataBind();        }    }    /// <summary>    /// 顺序控件    /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    protected void AspNetPager1_PageChanged(object sender, EventArgs e)    {        rpt_fenlei.DataBind();    }}

你这里的Repeater id为rpt_infoRepeater rpt_info = (Repeater)e.Item.FindControl("rpt_info");// 找到分类Repeater关联的数据项 而你后面绑定GridView1.DataSource = pds;GridView1.DataBind();能不报错！