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_info
Repeater 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！