How can I have a specific tab refreshed on post in Asp.Net Core Razor

Question

I have a tabbed Razor page, on load there is no data to be retrieved from server, active tab set for first tab. However, when I update data on one tab and post it I want the page to get only data for that tab. What I have so far is:

 

html:

 

<ul class="nav nav-tabs" id="PTWTab" role="tablist">
        <li class="nav-item">
            <a class="nav-link active" id="PTW-tab" data-toggle="tab" href="#PTW" aria-controls="ptw" aria-selected="true" style="width:200px">Permit To Work</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" id="HazId-tab" data-toggle="tab" href="#HazId" aria-controls="hazid" aria-selected="false" style="width:200px">Hazard Identification</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" id="GasTest-tab" data-toggle="tab" href="#GasTest" aria-controls="gt" aria-selected="false" style="width:200px">Gas Testing</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" id="IsoCert-tab" data-toggle="tab" href="#IsoCert" aria-controls="isocert" aria-selected="false" style="width:200px">Isolation Certificate</a>
        </li>
    </ul>

cshtml for post:

 

public async Task<IActionResult> OnPostIsoCertAsync(int? PTWNo)
        {

            if (!ModelState.IsValid)
            {
                return Page();
            }

            var newIsoCert = await _context.ICContents.FindAsync(PTWNo);

            if (newIsoCert == null)
            {
                return NotFound();
            }

            if (await TryUpdateModelAsync<ICContent>(
                         newIsoCert,
                         "ICContent",   // Prefix for form value.
                           c => c.IdICD,
                           c => c.IsoStep,
                           c => c.EquipmentID,
                           c => c.EquipmentDescription,
                           c => c.EnSource,
                           c => c.IsType,
                           c => c.IsMethod,
                           c => c.LockNo,
                           c => c.PreparedBy,
                           c => c.ImplementedBy,
                           c => c.VerifiedBy,
                           c => c.IsStatus))
            {
                await _context.SaveChangesAsync();

                return Page();
            }

            return Page();
        }

 and cshtml for Get is:

 

public async Task<IActionResult> OnGetIsoCertAsync(int ptwNoId)
        {

            PTWIsoCert = await (from a in _context.ICDatas.Where(a => a.PTWNo == ptwNoId)
                                orderby a.IdICD
                                join b in _context.ICContents on a.IdICD equals b.IdICD into TempData1
                                from c in TempData1

                                select new PTWIsoCert
                                {
                                    IdICD = a.IdICD,
                                    PTWNo = ptwNoId,
                                    IsoDate = a.IsoDate,
                                    IsoStep = c.IsoStep,
                                    EquipmentID = c.EquipmentID,
                                    EquipmentDescription = c.EquipmentDescription,
                                    EnSource = (int)c.EnSource,
                                    IsType = (int)c.IsType,
                                    IsMethod = (int)c.IsMethod,
                                    LockNo = c.LockNo,
                                    PreparedBy = c.PreparedBy,
                                    ImplementedBy = c.ImplementedBy,
                                    VerifiedBy = c.VerifiedBy,
                                    IsStatus = (int)c.IsStatus
                                }).ToListAsync();

            return Page();
        }

What I want is after I post data in the selected tab, to get it from server and keep the tab active and display it. Html for display is already setup, I didn't post it to not load too much data