关于datagrid 绑定 dropdownlist 的问题，急需大家帮助？

补充一下：

<asp:DataGrid id="DataGrid2" Width="100%" style="BORDER-RIGHT: #99ccff 1px solid; BORDER-TOP: #99ccff 1px solid; FONT-SIZE: 12px; BORDER-LEFT: #99ccff 1px solid; BORDER-BOTTOM: #99ccff 1px solid"
HeaderStyle-BackColor="#99ccff" AllowPaging="True" OnEditCommand="mydatagrid_edit"
OnCancelCommand="mydatagrid_cancel" OnUpdateCommand="mydatagrid_update" OnDeleteCommand="mydatagrid_delete"
DataKeyField="id" AutoGenerateColumns="False" runat="server">
<Columns>
<asp:EditCommandColumn HeaderText="操作" EditText="编辑" CancelText="取消" UpdateText="更新">
                                    <ItemStyle Wrap="False" />
                                    <HeaderStyle Width="90px" />
                                </asp:EditCommandColumn>
                                <asp:TemplateColumn HeaderText="指定组">
                                    <ItemTemplate> <asp:DropDownList ID = "ddlgroup" runat="server" DataTextField="groupname" DataValueField="gid" DataSourceID="SqlDataSource1"> </asp:DropDownList> <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString=" <%$ ConnectionStrings:TY3LConnectionString %>"
                                        SelectCommand="select u.id,g.id as gid,g.groupname,u.userno,u.username,u.userpwd,u.macaddress,u.keyvalue,u.memo from tblusers u left join tblgroup g on u.groupid=g.id" >
                                    </asp:SqlDataSource>
                                    </ItemTemplate>
                                    <HeaderStyle CssClass="inputs" Width="132px" />
                                </asp:TemplateColumn>
<asp:BoundColumn DataField="memo" HeaderText="备注">
                                    <HeaderStyle Width="132px" />
                                </asp:BoundColumn>
    <asp:TemplateColumn HeaderText="操作">
                                <ItemTemplate>
                                    <asp:Button ID="Delete" CommandName="delete" Text="删 除" Runat="server" CssClass="inputs"> </asp:Button>
                                </ItemTemplate>
                                    <HeaderStyle CssClass="inputs" Width="132px" />
                                </asp:TemplateColumn>
                            </Columns>
<PagerStyle Visible="False"> </PagerStyle>
                            <HeaderStyle BackColor="#99CCFF" />
</asp:DataGrid>

怎么没人响应呢，现在怎么这么冷清呢？