Hide Image icon when path is Null in ASP.Net

vrindavani says:

<img class="fancybox"  visible='<%#!string.IsNullOrEmpty(Eval("img_path").ToString()) %>'  src='<%#string.Concat("Img/",Eval("img_path")) %>'  style="width:100%" object-fit:cover; />

 Since you are using HTML image tag visible property will not work without runat="server".

Add the runat="server" property.

<img class="fancybox" runat="server" visible='<%#!string.IsNullOrEmpty(Eval("img_path").ToString()) %>'  src='<%#string.Concat("Img/",Eval("img_path")) %>'  style="width:100%" object-fit:cover; />