Argthtjtr

I'm very new to programming and I got really confused how to do this..

What I'm trying to do is a table for creating an offer after picking the materials I want. Price will change while I pick different materials. At the end, I will save the offer, with total price etc.

I have a list of Product Models. And in my view, I would like to pick the product model I want in "First Column" using it's FullName and I want to populate other columns in same row with the Models' predefined details that I just picked.

I made a research how to do it. Jquery, Ajax were mentioned but I will have to add more of those dropdown lists with more Viewbags. Don't I have to write a new Ajax for each dropdown then ?

I really hope to be guided in what way I should try to do this.

Thanks in advance!

 public class Model:BaseEntity

{

    public TypeOfPart TypeOfPart { get; set; }

    public string BrandName { get; set; }

    public string ModelName { get; set; }

    public string VersionName { get; set; }

    public decimal? ListPriceTL { get; set; }

    public decimal? ListPriceForeign { get; set; }

    public ForeignCurrency? ForeignCurrency { get; set; }

    public decimal CurrentDiscount { get; set; } = 0.00M;



    public int? CertificateId { get; set; }

    public Certificate Certificate { get; set; }



    public string FullName => $"{BrandName} {ModelName} {VersionName}";

My Controller

public IActionResult Create()

    {

        int amountOfElevators = Convert.ToInt32(TempData["Amount"]);

        ViewBag.amount = amountOfElevators;





        ViewData["Machines"] = new SelectList(_context.ModelRepo.GetAll()

            .Where(x => x.TypeOfPart 

==TypeOfPart.Machine),"Id","FullName");







        ViewData["ConstructionCompanyId"] = new 

SelectList(_context.ConstructionCompanyRepo.GetAll(), "Id", "Name","Id");

        ViewData["EmployeeId"] = new 

SelectList(_context.EmployeeRepo.GetAll(), "Id", "FullName");

        return View();

    }

Here's the image for a little more description of what I need

EDIT:
My View Model

public class InstallationOfferVM

{

    public InstallationOfferVM()

    {

        OfferedElevators = new List<OfferedElevator>();

        Models = new List<Model>();

    }

    public int Id { get; set; }

    [Display(Name = "Toplam ₺")]

    public decimal TotalPriceTL { get; set; }

    [Display(Name = "Toplam €")]

    public decimal TotalPriceEuro { get; set; }

    [Display(Name = "Açıklama")]

    public string Description { get; set; }

    [Display(Name = "Müşteri Firma")]

    public int ConstructionCompanyId { get; set; }

    [Display(Name = "Müşteri Firma")]

    public string CompanyName { get; set; }

    public ConstructionCompany ConstructionCompany { get; set; }

    [Display(Name = "Teklif Tarihi")]

    [DataType(DataType.Date)]

    public DateTime DateOfProposal { get; set; }

    [Display(Name = "Teklifi Veren")]

    public int EmployeeId { get; set; }

    [Display(Name = "Teklifi Veren")]

    public string EmployeeFullName { get; set; }

    public Employee Employee { get; set; }

    [Display(Name = "Teklif Durumu")]

    public ProposalStatus ProposalStatus { get; set; }

    [Display(Name = "İletme Şekli")]

    public DeliveredBy DeliveredBy { get; set; }

    [Display(Name = "Asansör Adedi")]

    public int AmountOfElevators { get; set; }





    public List<OfferedElevator> OfferedElevators { get; set; }

    public OfferedElevator OfferedElevator { get; set; }





    public int InstallationOfferId { get; set; }

    [Display(Name = "Kapasite")]

    public int Capacity { get; set; }

    [Display(Name = "Durak")]

    public int StopCount { get; set; }

    [Display(Name = "Halat Adedi")]

    public int MachineRopeCount { get; set; }

    [Display(Name = "Askı Tipi")]

    public int HangStyle { get; set; } = 1;

    [Display(Name = "Tahrik Tipi")]

    public DriveType DriveType { get; set; }

    [Display(Name = "Ortalama Kat Yüksekliği")]

    public decimal AvgFloorHeight { get; set; } = 3.00M;

    [Display(Name = "Giriş Adedi")]

    public int EntranceCount { get; set; } = 1;

    [Display(Name = "Ekstra Kapı")]

    public int AdditionalDoor { get; set; } = 1;

    [Display(Name = "Ağırlık Yanda İse")]

    public bool WeightInSide { get; set; }

    [Display(Name = "Kapı Yüksekliği 2100 ise")]

    public bool DoorHeightIs2100 { get; set; } = false;

    [Display(Name = "Euro Kuru")]

    public decimal CurrentEuro { get; set; }

    public List<Model> Models { get; set; }

    public Model Model { get; set; }

}

My View

@model Ace.ViewModels.InstallationOfferVM

@for (int i = 0; i < ViewBag.amount; i++)

{

<table class="table-sm table-striped table-dark col-md-9">

            <thead>

                <tr>

                    <th></th>

                    <th>Malzeme Cinsi</th>

                    <th>Adet</th>

                    <th>Liste Euro</th>

                    <th>Liste TL</th>

                    <th>İskonto</th>

                    <th>Toplam</th>

                </tr>

            </thead>

            <tbody>

                <tr>

                    <td></td>

                    <td><select asp-for="Model.Id" class="form-control" asp- 

items="ViewBag.Machines"></select></td>

                    <td>1</td>

                    <td></td>

                </tr>

            </tbody>

        </table>

    </div>

    <hr />

}

</form>

<div>

<a asp-action="Index">Back to List</a>

</div>

I would suggest to change your controller method this way:

public IActionResult Create()

{

    var offeredElevators = //query here to get the offeredElevators

    var viewmodel = new InstallationOfferVM 

    {

       OfferedElevators = offeredElevators,

       Models = new List<Model>()

    };



    return View(viewmodel);

}

this way you can at least get your data to the view, how it is supposed to be done. I am not sure if i agree with your model/viewmodel though..

hope this helps a little at least