aspx代码：

<asp:Repeater ID="headlist2" runat="server" OnItemDataBound="headlist2_ItemDataBind">
<HeaderTemplate>

</HeaderTemplate>
<ItemTemplate>
<ul><!-- 这里是有二级导航的 -->
<li class="second_nav" onMouseOut="unshow_it(this)" onMouseOver="show_it(this)">
<a href="News/list.aspx?id=<%# Eval("id") %>"><%# Eval("catName") %><asp:Image ID="chead" runat="server" ImageUrl="img/33.png" /></a>
<span>
<asp:Repeater ID="clist" runat="server" >
<ItemTemplate>
<a href="News/list.aspx?id=<%# Eval("id") %>"><%# Eval("catName") %></a>
</ItemTemplate>
</asp:Repeater>

</span>
</li>
</ul>
</ItemTemplate>
<FooterTemplate>

</FooterTemplate>
</asp:Repeater>

aspx.cs代码

protected void HeaderBind()
{
DataSet ds = new DataSet();
ds = null;
ds = catImpl.GetCategoryListByCId(2);
if (ds != null)
{
this.headlist2.DataSource = ds.Tables[0];
this.headlist2.DataBind();
}

｝

protected void headlist2_ItemDataBind(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
Repeater rep = e.Item.FindControl("clist") as Repeater;//找到里层的repeater对象
DataRowView rowv = (DataRowView)e.Item.DataItem;//找到分类Repeater关联的数据项
int typeid = Convert.ToInt32(rowv["id"]); //获取填充子类的id
DataSet d = new DataSet();
d = null;
d= catImpl.GetCategoryListByCId(typeid);
if (d != null)
{
rep.DataSource = d.Tables[0];
rep.DataBind();
}

}

}

怎么根据里层repeater取得的值来设置控件（<asp:Image ID="chead" runat="server" ImageUrl="img/33.png" />）状态（里层repeater取得并绑定数据时显示Image图片控件，否则就不显示图片）？求解？