protected void LinkButton1_Click(object sender, EventArgs e)
    {
        BindAgain();
    }

    void BindAgain()
    {
        Bind();
        int id = int.Parse(Request["ID"].ToString());
        string sql = "select * from MarketProduct where SecondID = '" + id + "' order by MallPrice asc";
        DataView dv = Farm.DBUtility.DbHelperSQL.Query(sql).Tables[0].DefaultView;
        this.DataList1.DataSource = dv;
        this.DataList1.DataBind();
        dv = null;
    }

 <asp:LinkButton ID="LinkButton1" runat="server" CssClass="price_up"                 onclick="LinkButton1_Click">价格</asp:LinkButton>