<div style="width:260px; clear:both; height:200px; overflow:hidden;">
<asp:repeater id="rptList1" runat="server">
<ItemTemplate>
    <div style="float:left; width:120px; height:25px; line-height:25px; overflow:hidden; text-align:left; margin-left:5px; margin-right:5px; margin-bottom:10px;">
      aaaa
    </div>
</ItemTemplate>
</asp:repeater>
</div>

------解决方案--------------------

HTML code

<table width="100%" border="0" cellpadding="0" cellspacing="0" class="12title" ID="Table5">
<asp:repeater id="rptList1" runat="server">
<ItemTemplate>
<tr>
<td>11</td>
<td>22</td>
</tr>
</ItemTemplate>
</asp:repeater>
</table>

------解决方案--------------------

C# code
<asp:repeater id="rptList1" runat="server">
<ItemTemplate>
<ul>
<li>ssssssssssss</li>
<li>sssssssssssss</li>
</ul>
<ul>
<li>ssssssssssss</li>
<li>sssssssssssss</li>
</ul>
</ItemTemplate>
</asp:repeater>
<style type="text/css">
ul{
    list-style-type:none;  width:220px;border-bottom:1px  red  dotted
}
li{
    width:100px;float:left;border-right:1px  red  dotted;
}
</style>