Repeater 后台设置第N行的样式

   <asp:Repeater ID="R1" runat="server" OnItemDataBound="R1_ItemDataBound">
                <ItemTemplate>
                    <div runat="server" id="div">
                        <%#Eval("time","{0:yyyy-MM-dd}") %>
                        <%#Eval("name") %>
                 </div>
                </ItemTemplate>
            </asp:Repeater>

    <style>
        .h1{ font-weight:bold;}
    </style>

using System.Web.UI.HtmlControls;
  
 protected void R1_ItemDataBound(object sender, RepeaterItemEventArgs e)
        {
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
            {
                HtmlControl div = (HtmlControl)e.Item.FindControl("div");
                if (e.Item.ItemIndex == 0)
                {
                    div.Attributes.Add("class", "h1");
                }
            }
        }