<asp:Image ID="tx1" runat="server" Height="160px" Width="400px"
ImageUrl='<%# System.IO.File.Exists("upload/"+Eval("kemu")+"/"+Eval("tx")+".jpg")?"upload/"+Eval("kemu")+"/"+Eval("tx")+".jpg":"hander.aspx?id="+Eval("tx") %>'
Visible='<%# Eval("tx").ToString()!=null ?true:false %>' AlternateText='<%# " " %>' />