请大家帮我看下我这个问题

public static void bind(GridView GD ,string st)
    {
        
        OleDbConnection con = connect.con();
        OleDbDataAdapter da = new OleDbDataAdapter(st, con);
        DataSet ds = new DataSet();
        da.Fill(ds,"tab");
        GD.DataSource = ds;
        GD.DataMember = "tab";
        GD.DataBind();
      
    }//这一块是数据绑定的！

   public static OleDbDataReader log(user p,string a)
    {
        
        OleDbConnection con = connect.con();
        con.Open();
        OleDbCommand com = new OleDbCommand(a, con);
        OleDbDataReader dr = com.ExecuteReader();
        
        return dr;
        con.Close();
    }//这个是查找数据库是否存在用户的！

protected void Button1_Click(object sender, EventArgs e)
    {
        user perp = new user();
        perp.name = Tbname.Text;
        perp.question = DDLqtion.Text;
        perp.answer = TBanswer.Text;
        string st = "select * from peoper where name='" + perp.name + "'and question='" + perp.question + "'and answer='" + perp.answer + "'";
        
       if(operate.log(perp,st).Read())
        {
            string GVsrt = "select * from peoper where namer='" + perp.name + "'";
             Panel2.Visible = true;
            operate.bind(GView1, GVsrt);
           
        }
        else
        {
            Response.Write("<script>alert('你所回答的问题不对！请重新输入！')</script>");
            Panel1.Visible = false;
            Tbname.Text = "";
            Tbname.Focus();
        }
    }//这是按钮的代码！

我的用意把log()  bind()写在同一个类中，以方便重用。
问题出在    if(operate.log(perp,st).Read())
        {
            string GVsrt = "select * from peoper where namer='" + perp.name + "'";
             Panel2.Visible = true;
            operate.bind(GView1, GVsrt);
           
        }
能查找得出来，但是就是不能数据绑定。查找后就绑定不了。不查找的话，我直接调用bind()又能绑定。
大家告诉下我原因 吧！
先谢谢了！
（代码作用就是为用户找回密码，回答问题正确后就把他原本的密码显示出来）我的思路就是先查找，再显示！