protected void gvImages_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "DeleteImage")
        {
            GridViewRow      row    = (GridViewRow)((ImageButton)e.CommandSource).NamingContainer;
            OSAEImageManager imgmrg = new OSAEImageManager();
            imgmrg.DeleteImage(Int32.Parse(gvImages.DataKeys[row.RowIndex].Value.ToString()));

            loadImages();
        }
    }