Repeater 向上向下问题

[WJY258378039]

Repeater中的一列放两个图形BUTTON 一个是向上 一个是向下!我要的是点向上它会排序向上!向下同样的道理!

数据库有一排序字段!


有没有代码!或者说要怎么做呢!


前台代码:

<asp:Repeater ID="RepNews" runat="server" onitemcommand="RepNews_ItemCommand">
<HeaderTemplate>
<table id="MenuTable" class="main_table" cellpadding="0" cellspacing="1" border="0" width="100%">
<tr align="center" class="td_title">
<td style="height: 10px;" class="usertablerow1" align="center" width="8%">
全选<input id="Checkbox2" type="checkbox" runat="server" onclick="selectAll('MenuTable',this.checked)" />
</td>
<td class="usertablerow1" align="center" width="5%" style="height: 7px;">
产品名称
</td>
<td class="usertablerow1" align="center" width="10%" style="height: 7px;">
序号
</td>
<td class="usertablerow1" align="center" width="13%" style="height: 7px;">
产品类别
</td>
<td class="usertablerow1" align="center" width="13%" style="height: 7px;">
图片
</td>
<td class="usertablerow1" align="center" width="10%" style="height: 7px;">
是否推荐
</td>
<td class="usertablerow1" align="center" width="8%" style="height: 7px;">
排序
</td>
<td class="usertablerow1" align="center" width="12%" style="height: 7px;">
语种
</td>
<td class="usertablerow1" align="center" width="10%" style="height: 7px;">
  操作
</td>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr class="td_on" onmouseover="this.className='td_off'" onmouseout="this.className='td_on'">
<td class="usertablerow1" align="center" width="8%">
<asp:CheckBox ID="chkSelect" runat="server" />
</td>
<td class="usertablerow1" align="center" width="15%">
<asp:Label ID="Label1" runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "Id")%>' Visible="false"></asp:Label><a href='Products.aspx?id=<%#DataBinder.Eval(Container.DataItem,"Id") %>'><%#DataBinder.Eval(Container.DataItem,"Title") %></a>
</td>
<td class="usertablerow1" align="center" width="10%">
<%#Eval("ProductSort")%>
</td>
<td class="usertablerow1" align="center" width="13%">
<%#Eval("ProTypeZH") %>
</td>
<td class="usertablerow1" align="center" width="13%">
<a href="../upload/bigImg/<%#Eval("BigPhoto") %>" rel="lightbox[1]" title="<%#Eval("Title") %>">查看图片</a>
</td>
<td class="usertablerow1" align="center" width="10%">
<%#Eval("recommend").ToString() == "False" ? "不推荐" : "推荐"%>
</td>
<td class="usertablerow1" align="center" width="8%">
<%-- <%#Eval("ProductSort")%>--%><asp:ImageButton ID="ImageButton1" runat="server" CommandName="up" CommandArgument='<%# Eval("ProductSort") %>' ImageUrl="~/Admin/images/Rup.jpg"/><asp:ImageButton ID="ImageButton2" CommandName="down" CommandArgument='<%# Eval("ProductSort") %>' runat="server" ImageUrl="~/Admin/images/Rdown.jpg"/>
</td> <td class="usertablerow1" align="center" width="12%">
<%#Eval("Language")%>
</td>
<td class="usertablerow1" align="center" width="10%">
  <a href='Products.aspx?id=<%#DataBinder.Eval(Container.DataItem,"Id") %>'>编辑</a>
</td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>


后台要怎么写呢:
??????????