如何弹出确认删除对话框(Asp.Net2 的C#编程)

<asp:GridView PageSize="15" cssclass="DataGridStyle" BorderWidth="1px" BorderColor="Silver" ID="gdvInfo" runat="server" AutoGenerateColumns="False" AllowPaging="True"  OnRowEditing="gdvInfo_RowEditing" OnRowDeleting="gdvInfo_RowDeleting" DataKeyNames="UNIQUEID" OnPageIndexChanging="gdvInfo_PageIndexChanging" CellPadding="4" ForeColor="#333333">
<Columns>
<asp:HyperLinkField HeaderText="详细" Text="查看" HeaderStyle-Width="40px" HeaderStyle-Wrap="false" DataNavigateUrlFields="UniqueID" DataNavigateUrlFormatString="FightDroughtFilesInfo.aspx?cmd=view&amp;&amp;uniqueid={0}" />
                    <asp:TemplateField HeaderText="名称">
                        <ItemTemplate>
    <a runat="server" href='<%#ConstructHref(DataBinder.Eval(Container.DataItem, "uniqueid").ToString(), DataBinder.Eval(Container.DataItem, "FLPTH_").ToString())%>' ID="A1">
    <%# DataBinder.Eval(Container.DataItem, "NM_")%>
    </a>
                        </ItemTemplate>
                    </asp:TemplateField>
<asp:BoundField DataField="TM_" HeaderText="加入时间" DataFormatString="{0:yyyy年MM月dd日HH时mm分}" HtmlEncode="False"/>
                    <asp:TemplateField HeaderText="删除"  HeaderStyle-Width="40px" HeaderStyle-Wrap="false">
                        <ItemTemplate>
                            <asp:ImageButton runat="server" ID="btnDelete" OnClientClick="return confirm('确定要删除?');" ImageUrl="~/Images/button/delete.gif" CommandName="Delete"/>
                        </ItemTemplate>
                    </asp:TemplateField>
                </Columns>
<HeaderStyle cssclass="HeaderStyle1"/>
<RowStyle cssclass="RowStyle1" />
                <EditRowStyle cssclass="EditRowStyle1" />
                <SelectedRowStyle cssclass="SelectedRowStyle1" />
                <PagerStyle cssclass="PagerStyle1" />
                <AlternatingRowStyle cssclass="AlternatingRowStyle1" /> <FooterStyle CssClass="FooterStyle1" />
            </asp:GridView>
  
---------------------------------------------
EMail:[email protected] 请给我一个与您交流的机会！