我想这会在这里运作良好..

i think this will work fine here..

// stroing value
 Session["img"] = Image1.ImageUrl;
        Response.Redirect("Default3.aspx")
// calling image
if (Session["img"] != null)
        {
            Image1.ImageUrl =Session["img"].ToString();
        }

请告诉我是否错了

please do tell if its wrong