System.Web.HttpResponse.ApplyAppPathModifier C# (CSharp) Method

		public string ApplyAppPathModifier (string virtualPath)
		{
			if (virtualPath == null || context == null)
				return null;
		
			if (virtualPath.Length == 0)
				return context.Request.RootVirtualDir;

			if (UrlUtils.IsRelativeUrl (virtualPath)) {
				virtualPath = UrlUtils.Combine (context.Request.RootVirtualDir, virtualPath);
			} else if (UrlUtils.IsRooted (virtualPath)) {
				virtualPath = UrlUtils.Canonic (virtualPath);
			}

			bool cookieless = false;
			SessionStateSection config = WebConfigurationManager.GetWebApplicationSection ("system.web/sessionState") as SessionStateSection;
			cookieless = SessionStateModule.IsCookieLess (context, config);

			if (!cookieless)
				return virtualPath;

			if (app_path_mod != null && virtualPath.IndexOf (app_path_mod) < 0) {
				if (UrlUtils.HasSessionId (virtualPath))
					virtualPath = UrlUtils.RemoveSessionId (VirtualPathUtility.GetDirectory (virtualPath), virtualPath);
				return UrlUtils.InsertSessionId (app_path_mod, virtualPath);
			}
		
			return virtualPath;
		}

        public static string showNextPrevious(int start, int size, int total, string url, HttpResponse Response)
        {
            if (size >= total)
            {
                return "";
            }
            

            string tmp;

            int index = (start % size != 0) ? start / size + 1 : start / size; // pagina en la que estamos

            int cnt = (index - NUM_PAGINATION / 2 < 0) ? 0 : index - NUM_PAGINATION / 2; // donde empezamos

            string active;
            //Se muestra prev
            active = ((start - size) >= 0) ? "" : "class='disabled'";
            tmp = String.Format(pattern,
                                active,
                                Response.ApplyAppPathModifier(String.Format(url, start - size)),
                                "&laquo;");
            //if (cnt > 0)
            //    tmp = String.Format(pattern,
            //                    "class='disabled'",
            //                    "#",
            //                    "...");
            //bool stop = false;
            for (int i = 0; i < NUM_PAGINATION; i++)
            {
                if ((cnt + i) * size >= total)
                    //{
                    //    stop = true;
                    break;
                //}
                active = ((cnt + i) == index) ? "class='active'" : "";
                tmp += String.Format(pattern,
                                     active,
                                     Response.ApplyAppPathModifier(String.Format(url, ((cnt + i) * size))),
                                     "" + (cnt + i + 1));
            }

            //if (!stop)
            //    tmp = String.Format(pattern,
            //                    "class='disabled'",
            //                    "#",
            //                    "...");

            //Se muestra next
            active = (total > (start + size)) ? "" : "class='disabled'";
            tmp += String.Format(pattern,
                                active,
                                Response.ApplyAppPathModifier(String.Format(url, start + size)),
                                "&raquo;");

            return "<div class='pagination'><ul>" + tmp + "</ul></div>";
        }