最简单的delete语句

求助最简单的delete语句
string sql=int.Form("delete from T1 where ID='{0}'",n)

其中ID是主键，若n是选中行ID的值，怎么得到n?

其实就是怎么得到鼠标选中行的主键值？

各位大神，帮帮忙吧，我新手菜鸟

[解决办法]

C# code

 <script type="text/javascript">        function checkDelete() {            return confirm('是否删除？');        }    </script> <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" OnRowCommand="GridView1_RowCommand" >        <Columns>            <asp:BoundField DataField="ID" HeaderText="编号" />            <asp:BoundField DataField="NameL" HeaderText="名称" />           <asp:TemplateField>                <ItemTemplate>                    <asp:LinkButton ID="lkBtnDelete" runat="server" Text="删除" CommandArgument='<%# Eval("ID") %>'                        CommandName="delRow" OnClientClick="return checkDelete()"></asp:LinkButton>                </ItemTemplate>           </asp:TemplateField>        </Columns>    </asp:GridView>