.Net 6 - Different session for each browser tab – diff images in each

Question

I been having some major issues with this, I feel like this shouldn’t be so hard but.. I am trying to be able to open a link which brings pictures to the browser to display them. I have this working. What I am trying to do is when someone opens another link itll open a new tab and they will have those new pictures in that tab and the previous pictures in the other tab. I tried to do this with Sessions but it overwrites the session, and both tabs show the same pics. I now coded it up so I have a different session guid for each tab and I go to try to view the pics but the same thing happens. The tab is over written. My new idea is to save this huge text file in a hidden variable on the page and read from that. But when I do this my tempdata var says the page cannot be found but if I remove the tempdata var the page works… I rewrote a bunch of methods some multiple times. Any ways to make this work would be greatly appreciated

         public async Task<ActionResult> PopulateFileCache(string folderPath)
        {
            if (!string.IsNullOrEmpty(folderPath))
            {                
                using var client = _httpClient.CreateClient("MesserAPI");
                try
                {
                    using var response = await client.GetAsync($"/api/File/GetFolderFiles?folderPath={folderPath}");
                    if (response.IsSuccessStatusCode)
                    {
                        var lstFiles = await response.Content.ReadAsStringAsync();
                        ViewData["lstParts"] = lstFiles;

                        TempData["SlideTotal"] = 0;

                        if (_contextAccessor.HttpContext.Session.IsAvailable)
                        {
                            SaveToSession(lstFiles);
                        }
                        TempData["guid"] = _contextAccessor.HttpContext.Session.GetString("sGUID") ?? string.Empty;
                    }
                }
                catch (Exception ex)
                {
                    _logger.LogError(ex.Message);
                }
            }
            return RedirectToAction("FileViewer");
        }


public IActionResult ReturnData(string sessionID)
        {
            //if (objFiles != null)
            //{
                if (TempData != null)
                {
                    TempData.Keep();
                }
                List<LNPartVM> lNParts = null;
                try
                {
                    //var jsonResponse = objFiles;
                    //var jsonResponse = GetFromSession();
                    var jsonResponse = GetFromSession(sessionID);
                    if (!string.IsNullOrWhiteSpace(jsonResponse))
                    {
                        lNParts = JsonSerializer.Deserialize<List<LNPartVM>>(jsonResponse);
                    }

                    if (lNParts?.Count > 0)
                    {
                        TempData["SlideTotal"] = lNParts.Count;
                        _contextAccessor.HttpContext.Session.SetInt32("SlideTotal", lNParts.Count);
                        int partIndex = 0;

                        try
                        {
                            partIndex = (int)(_contextAccessor.HttpContext.Session.GetInt32("PartIndex") == null ? 0 : _contextAccessor.HttpContext.Session.GetInt32("PartIndex"));
                        }
                        catch (Exception ex)
                        {
                            _logger.LogError(ex.Message);
                        }
                        LNPartVM partVM = lNParts[partIndex];
                }
                catch (Exception ex)
                {
                    _logger.LogError(ex.Message);
                }
            //}
            return ViewComponent("DataPage");
        }
        public string GetSessionID()
        {
            return _contextAccessor.HttpContext.Session.Id;
        }
        public string GetSessionGUID()
        {
            return Guid.NewGuid().ToString();
        }
        //string sessionName,
        public IActionResult SaveToSession(string obj)
        {
            bool status = false;
            // Same Session across browsers
            //string sessionID = GetSessionID();
            string sessionID = GetSessionGUID();

            if (!string.IsNullOrWhiteSpace(sessionID))
            {
                _contextAccessor.HttpContext.Session.SetString(sessionID, obj);
                _contextAccessor.HttpContext.Session.SetString("sGUID", sessionID);
                status = true;
            }
            else
            {
                _contextAccessor.HttpContext.Session.SetString("SessionPN", obj);
                status |= true;
            }

            if (status)
            {
                return Content("Session Saved");
            }
            return Content("Session Error");
        }

  public async Task<IActionResult> FileViewer()
        {
            return View();
        }

This is on the HTML page

$('#btnNext').click(function (e) {
    e.preventDefault();

    console.log(iSlideCount);

    if (iSlideCount > 0) {
        $.ajax({
            type: 'GET',
            url: '@Url.Action("NextPart", "File")',
            contentType: 'Json'
        })
        .done(function(e) {
            var sguid = $("#txthguid").val();
            var route = '@Url.Action("ReturnData","File", new { sessionID="-1" })';
            route = route.replace("-1", sguid);
            $('#contentData').load(route);

            //$('#contentData').load('@Url.Action("ReturnData","File")');

            //$('#part').load('@Url.Action("ReturnData","File")');