Once I have this code, as I do that this image is of proportions that I want: 100 x 100, 41 x 41 or another. When I try, no image is displayed, as if it was a mistake and the picture is a white picture?? 

I try to use a single pair of quotes or two pari and  I have not gotten results....

 <img src="<%=Foto%>" alt="" height="42" width="42" /></td>
 And 
 <img src='<%=Foto%>' alt='' height='42' width='42' /></td>