ASP.Net Core MVC SelectList not returning selected value to controller - drop-down-menu

Question

For some reason all the selectlists are returning 0 to my controller. Below is my code, can someone please help?
View:
<div class="row align-items-start">
<div class="col-12">
<select app-for="customer.JobStage_Id"
asp-items="#(new SelectList(Model.jobStages, "Id", "Description",customer.JobStage_Id))"
class="selectpicker col-offset-1"></select>
</div>
</div>
Populate the list:
public IEnumerable<Lookups> getJobStages()
{
List<Lookups> jobStages = context.Lookups
.Where(s => s.Lookup_Type_Id == 15).ToList();
jobStages.Add(new Lookups { Id = 0, Description = "" });
return jobStages;
}
This is the view source code and everything looks correct so I don't understand why my model in my action has zeros for all selectlists.
<div class="row align-items-start">
<div class="col-12">
<select app-for="customer.JobStatus_Id" class="selectpicker col-offset-1"><option value="40">Dormant</option>
<option value="41">Waiting For POB POA Flex</option>
<option value="42">Sent Flex to Council / Awaiting Invoice</option>
<option value="43">Waiting for EST</option>
<option value="44">Waiting for Flex to be sent to Council</option>
<option value="45">Sent for Data Match</option>
<option value="46">Other</option>
<option selected="selected" value="0"></option>
</select>
</div>
</div>
Below is my full view followed by the full action:
[HttpPost]
public IActionResult UpdateCustomer(Customer customer)
{
if (ModelState.IsValid)
{
if (customer.PK_Id == 0)
{
customerRepository.add(customer);
}
else
{
customerRepository.update(customer);
}
}
return RedirectToAction("Index","Home");
}

Answer 1

You can try following code.
In your action:
public IActionResult ViewAction()
{
ViewData["JobStage_Id"] = new SelectList( context.Lookups.Where(s => s.Lookup_Type_Id == 15).ToList(), "Id", "Description");
return View();
}
In your view:
<select asp-for="customer.JobStage_Id" asp-items="ViewBag.JobStage_Id" class="selectpicker col-offset-1">
</select>
Please notice that your code is <select app-for="customer.JobStatus_Id",it should be asp-for,not app.