<asp:Repeater runat="server" id="repeater1" OnItemDataBound="Repeater1_ItemDataBound">
<HeaderTemplate>
<table width="100%" border=0 align="center"><tr>
</HeaderTemplate>
<ItemTemplate>
<td><%#DataBinder.Eval(Container.DataItem,"字段名")%></td>
</ItemTemplate>
<FooterTemplate>
</tr></table>
</FooterTemplate>
</asp:Repeater>

1//定义全局变量i
2int i=0;
3void Repeater1_ItemDataBound(object src,RepeaterItemEventArgs e){
4if(i%3==0){ //这里的3就代表表格有3列
5e.Item.Controls.Add(new LiteralControl("</tr><tr>"));
6}
7i++;
8}