gridview 删除记录

aspx文件

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" Height="194px" Width="703px" AllowPaging="True" OnPageIndexChanging="GridView1_PageIndexChanging" OnRowCommand="GridView1_RowCommand" PageSize="3">
            <Columns>
                <asp:TemplateField>
                    <ItemTemplate>
                        <table style="width: 681px">
                            <tr>
                                <td style="width: 111px">
                                    <%#Eval("productname")%>
                                </td>
                                <td style="width: 114px">
                                    <asp:Image ID="Image1" runat="server" ImageUrl='<%#"../"+Eval("productsltimg") %>' Width="110" Height="83" />
                                </td>
                                <td style="width: 277px">
                                    <%#Eval("productdate")%>
                                </td>
                                <td>
                                    <asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='<%#"~/productinfo.aspx?pid="+Eval("productid") %>' Target="_blank">
                                        查看信息
                                    </asp:HyperLink>
                                </td>
                                <td>
                                    <asp:HyperLink ID="HyperLink2" runat="server" NavigateUrl='<%#"admin_modfiyproduct.aspx?pid="+Eval("productid") %>'>
                                        修改
                                    </asp:HyperLink>
                                </td>
                                <td>
                                    <asp:Button ID="Button2" runat="server" Text="删除" CommandName="del" CommandArgument='<%# bind("productid") %>' />
                                </td>
                            </tr>
                        </table>  
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>

//

cs文件

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        int index = Convert.ToInt32(e.CommandArgument);
        DataSet myds = null;
        if (e.CommandName == "del")
        {
            myds = DbHelperaAce.DbHelperACE.Query("select * from productlist where productid=" + index + "");
            File.Delete(Server.MapPath("../"+myds.Tables[0].Rows[0]["productimg"].ToString()));
            File.Delete(Server.MapPath("../" + myds.Tables[0].Rows[0]["productsltimg"].ToString()));
            myds = DbHelperaAce.DbHelperACE.Query("delete * from productlist where productid=" + index + "");
            Response.Write("<script>alert('产品删除成功')</script>");
        }
        bindv();
    }