protected string GetData()
   {
       try
       {
           Session["LastImage"] = Session["SaveImage"];
           LastImage = Session["LastImage"].ToString();

           string url = Session["ImageUrl"].ToString();
           Session["SaveImage"] = Session["ImageUrl"];
           string szUrl = url.Replace("~", @"http://" +
Request.ServerVariables["HTTP_HOST"]);
           ImageUrl2 = szUrl;
           return szUrl;
       }
       catch (Exception e)
       {
           RecordError(e, EventLogEntryType.Error);
           return null;
       }
       finally
       {
           //Delete the previous images
           Thread t = new Thread(new ThreadStart(DeleteLastFile));
           t.Start();
       }
   }

   protected string GetData2()
   {
       return ImageUrl2;
   }

   private static string _ImageUrl2;
   public static string ImageUrl2
   {
       get { return _ImageUrl2; }
       set { _ImageUrl2 = value; }
   }

FWIW, I have verified that the returns are correct by setting breakpoints.

On Mar 6, 9:41 pm, "Steven" <some...@somewhere.com> wrote:

Steven, when your code of the GetData2() function does not generate
the html for ImageSec, you should check the function. If you cannot
find the error, post the code of the function here.

Alexey,
 Perhaps something else that may be relevant.  In Page_Load , the code sets
the visible properties of the ImagePrim and ImageSec to either true or
false, depending on which image is to be displayed.

   protected void Page_Load(object sender, EventArgs e)
   {
       if (!IsPostBack)
       {
           Session["ImageUrl"] =
ConfigurationManager.AppSettings["ImageUrl"];

           string f = GetExistingFile();
           Session["ImageUrl"] = Session["ImageUrl"] + f;

           this.ImagePrim.Visible = true;
           this.ImageSec.Visible = false;

           Session["flag"] = null;
           Session["Updating"] = 1;

           StartFileSystemWatcher();
       }

       if (Session["flag"] != null)
       {
           switch (Convert.ToInt32(Session["flag"]))
           {
               case 0:
                   this.ImagePrim.Visible = true;
                   this.ImageSec.Visible = false;
                   Session["flag"] = 1;
                   break;
               case 1:
                   this.ImageSec.Visible = true;
                   this.ImagePrim.Visible = false;
                   Session["flag"] = 0;
                   break;
               default:
                   break;
           }
       }
       else
       {
           Session["flag"] = 1;
       }

       Page.DataBind();

   }

On Mar 6, 9:41 pm, "Steven" <some...@somewhere.com> wrote:

Steven, when your code of the GetData2() function does not generate
the html for ImageSec, you should check the function. If you cannot
find the error, post the code of the function here.