repeater横向排列数据

<asp:Repeater ID="rptShowPaper" runat="server">
<ItemTemplate>
<asp:PlaceHolder ID="PlaceHolder1" runat="server" Visible='<%# (Container.ItemIndex + 1) % 3 ==1 %>'>
<tr>
</asp:PlaceHolder>

<td>
<div class="conTr">
<span class="Components">
<input name="xtzt" type="radio" value="1" /></span> <span class="ComponentsTitle3"><%# Eval("papername") %></span>
<span class="ComponentsTitle3"><a href="#">查看岗位要求</a></span>
</div>
</td>

<asp:PlaceHolder ID="PlaceHolder2" runat="server" Visible='<%# (Container.ItemIndex + 1) % 3 ==0 %>'>
</tr>
</asp:PlaceHolder>
</ItemTemplate>
</asp:Repeater>

private void bindRpt()
{
string sql = "";
sql = "SELECT * FROM paperdata";
rptShowPaper.DataSource = sssDB.GetDataTable(sql);   //绑定数据
rptShowPaper.DataBind();
}