,Repeater输出，第1条记录输出，某个参数固定_ASP.NET

高手请进,Repeater输出，第1条记录输出，某个参数固定
这是我现在的代码
前台页面

HTML code

<asp:Repeater ID="Top_GG01" runat="server"><ItemTemplate>    <div class="dis" name="f"><a href="ProductDef.aspx?id=344" target="_blank"><img src="../upload_pic/Pro/<%# Eval("picture_b")%>" onload= "resize(this,this.height)"/></a></div></ItemTemplate></asp:Repeater>

CS文件

C# code

    public void ProTop_1()    {        ODBdata da = new ODBdata();        string sql = "select top 5 * from product where isEncrypt=false order by ID desc";        DataSet ds = da.ExceDS(sql);        PagedDataSource pds = new PagedDataSource();        Top_GG01.DataSource = ds.Tables[0].DefaultView;        Top_GG01.DataBind();    }

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现在想实现的就是 DIV里的 class="dis" ，第一条记录的时候是 class="dis"，然后后面的记录都是 class="undis"

要实现成这样（如下）：

HTML code

<div class="dis" name="f"><a href="ProductDef.aspx?id=344" target="_blank"><img src="../upload_pic/Pro/<%# Eval("picture_b")%>" onload= "resize(this,this.height)"/></a></div><div class="undis" name="f"><a href="ProductDef.aspx?id=344" target="_blank"><img src="../upload_pic/Pro/<%# Eval("picture_b")%>" onload= "resize(this,this.height)"/></a></div><div class="undis" name="f"><a href="ProductDef.aspx?id=344" target="_blank"><img src="../upload_pic/Pro/<%# Eval("picture_b")%>" onload= "resize(this,this.height)"/></a></div>

------解决方案--------------------------------------------------------
<asp:Repeater ID="Top_GG01" runat="server">
<ItemTemplate>

<div class="<%i==0?"dis":"undis" %>" name="f">
<a href="ProductDef.aspx?id=344" target="_blank">
<img src="../upload_pic/Pro/<%# Eval("picture_b")%>" onload="resize(this,this.height)" /></a></div>
<%i=i+1; %>
</ItemTemplate>
</asp:Repeater>

后台
protected int i = 0;
protected void Page_Load(object sender, EventArgs e)
{
------解决方案--------------------------------------------------------

HTML code

<a class='<%# Container.ItemIndex==0?"dis":"undis"  %>'>ssss</a>