I in Repeater

.....
<asp:Repeater ID="Repeater1" runat="server" DataSourceID="DSNews">
    <ItemTemplate>
        <div class="fotoNews"><img src="public/FotoNews/<%# Eval("Foto")%>" alt="" /></div>
        <div class="contenutoNews">
            <div class="titoloNews"><%# Eval("Titolo")%></div>
            <div class="testoNews"><%# Eval("Testo")%></div>
          </div>
    </ItemTemplate>   
    </asp:Repeater>
......

<% if rs("fotoNews") <>"" then %>
  <div class="fotoNews"><img src="public/FotoNews/<%=rs("fotoNews")%> " alt="" /></div>
<%end if%>

<%if(Eval("Foto") <>"" ){ %>
          <div class="fotoNews"><img src="public/FotoNews/<%# Eval("Foto")%>" alt="" /></div>
        <% }%>

<asp:Image runat="server" ID="imgNews" 
         ImageUrl="~/Images/noImage.gif" Visible="false" alt="" />

onitemdatabound="Repeater1_ItemDataBound"

protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
    RepeaterItem item = e.Item;
    if (item.ItemType == ListItemType.Item)
    {
        DataRowView dr = (DataRowView)item.DataItem;
        if (dr["Email"] != null && !string.IsNullOrEmpty(dr["Email"].ToString()))
        {
            Image imgNews = e.Item.FindControl("imgNews") as Image;
            if (imgNews != null)
            {
                imgNews.ImageUrl = dr["Email"].ToString();
                imgNews.Visible = true;
            }
        }
    }
}

Visible='<%# Eval("Immagine").ToString().Length > 0 %>'

Visible='<%# isVisible(Eval("Email")) %>'

protected bool isVisible(object email)
{
    if (!string.IsNullOrEmpty(email as string))
        return true;

    return false;
}

>o un riferimento a un assembly)

using System.Data;

 imgNews.ImageUrl ="~/public/FotoNews/" + dr["Foto"].ToString();