ASP.NET FormView控件的Update方法应该如何写？

Question

前台代码：

  <asp:FormView ID="FormView1" runat="server" OnItemUpdating="FormView1_ItemUpdating">
                <ItemTemplate>
                    <table style="width: auto">
                        <tr>
                            <td style="width: 150px">一级奖励</td>
                            <td>
                                <asp:TextBox ID="txtfr1" runat="server" CssClass="FR_textbox" Text='<%# Eval("gain1") %>'></asp:TextBox></td>
                        </tr>
                        <tr>
                            <td>二级奖励</td>
                            <td>
                                <asp:TextBox ID="txtfr2" runat="server" CssClass="FR_textbox" Text='<%# Eval("gain2") %>'></asp:TextBox></td>
                        </tr>
                        <tr>
                            <td></td>
                            <td>
                                <asp:Button ID="btnsubmit" runat="server" Text="修改" CommandName="Updating" />
                                <asp:Button ID="btncancel" runat="server" Text="取消" /></td>
                        </tr>
                    </table>
                </ItemTemplate>
                <EditItemTemplate>
                    <tr>
                        <td></td>
                        <td>
                            <asp:Button ID="btnsubmit" runat="server" Text="修改" CommandName="Updating" />
                            <asp:Button ID="btncancel" runat="server" Text="取消" /></td>
                    </tr>
                </EditItemTemplate>
            </asp:FormView>

后台CODE就不贴了，前台的FormView标签里 OnItemUpdated或者OnItemUpdating设置之后，那个修改按钮的CommandName该如何填写？才能完整的把这个更新数据的功能写出来？

Answer 1

http://blog.csdn.net/goodshot/article/details/6021592
http://www.qacn.net/viewchapter.aspx?topicid=29&chapterid=782