c# 让repeater多列显示

//前台

<table>
<tr>
<asp:repeater id="Repeater1" runat="server" 
        onitemdatabound="Repeater1_ItemDataBound">
<ItemTemplate>
<td><%#DataBinder.Eval(Container.DataItem,"thing")%></td>
</ItemTemplate>
</asp:repeater>
</tr>
</table>

//后台

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Xml.Serialization;

public partial class _Default : System.Web.UI.Page 
{
    protected int i = 1;

    protected void Page_Load(object sender, EventArgs e)
    {

        XmlSerializer ser = new XmlSerializer(typeof(DataSet));
        DataSet ds = new DataSet("myDataSet");
        DataTable t = new DataTable("table1");
        DataColumn c = new DataColumn("thing");
        t.Columns.Add(c);
        ds.Tables.Add(t);
        DataRow r;
        for (int i = 0; i < 10; i++)
        {
            r = t.NewRow();
            r[0] = i;
            t.Rows.Add(r);
        }
        this.Repeater1.DataSource = ds.Tables[0].DefaultView;
        this.Repeater1.DataBind();
    }


    protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
    {
        {
            if (i % 4 == 0 && i > 0)
            {
                e.Item.Controls.Add(new LiteralControl("</tr><tr>"));
            }
            i++;
        }
    }
}