Question

When I make my httppost call, i need to get the selected value and the id of a random number of dropdownlists in my view. The number of dropdownlists is random because they are created dynamically based on the selected value of another dropdownlist.
Example:
in dropdownlist 1 I select bmw. Then 3 dropdownlists are created, so the user can give each carmodel a rate value. Each dropdownlist has id= the model of the car and the options you can select is 1,2 and 3. If there was 4 carmodels of bmw, the options would then be 1,2,3 and 4 and so on…
When I make the httppost call, how do I in the controller run through all the dynammically created dropdownlist and check the value and id?

EDIT:
The controller of my index view:

public class BookingPensionController : Controller
{
    private DbEntities db = new DbEntities();
    EditBookingPensionViewModel objViewModel;
public ActionResult Index()
    {
        objViewModel = new EditBookingPensionViewModel
        {
            Booking = new Booking { BookingStartDate = DateTime.Today, BookingEndDate =  DateTime.Today, DateOfBooking = DateTime.Now }
        };
        objViewModel.deliveryTypes = new List<string>();
        int id = int.Parse(Session["id"].ToString());
        SelectList list;
        try
        {
            var deliverytypes = from d in db.DeliveryTypes
                                where d.Pension_ID == id
                                select d;
            foreach (DeliveryType item in deliverytypes)
            {
                objViewModel.deliveryTypes.Add(item.Titel);
            }
            ViewData["DeliveryTypes"] = objViewModel.deliveryTypes;

            objViewModel.customersToPension = new List<SelectListItem>();
            objViewModel.customersToPension = GetCustomersToPension(id);
        }
        catch (Exception ex)
        {

            throw;
        }

        int PensionId = int.Parse(Session["id"].ToString());
        objViewModel.CustomerValue = GetCustomersToPension(PensionId);

        return View(objViewModel);
    }

My Index view:

@model HundePensionBooking.ViewModels.EditBookingPensionViewModel
//Some code...
//And my script that retreives the customerinfo and creates the dropdownlists
$("#ddlCustomerId").change(function () {

         var id = $("#ddlCustomerId").val();
         getCustomerInfo(id);
         $('#customerinfo').load("@Url.Action("CustomerInfo", "BookingPension")");

         var ddlsource = "#ddlCustomerId";
         var ddltarget = "#ddlDogId";
         $.getJSON('@Url.Action("Dogs_SelectedCustomer")', { CustomerId: $(ddlsource).val() }, function (data) {


             $(ddltarget).empty();
             $("#tblRooms tr:gt(0)").remove();
             $.each(data, function (index, optionData) {
                 createDynamicTable($("#tblRooms"), optionData.Text, data.length);
             });
         });
     });
 });
 </script>
 <script type="text/javascript">
     function createDynamicTable(tbody, value, count) {
         if (tbody == null || tbody.length < 1) return;

             var trow = $("<tr>");
                 var cellText = value
                     var option;
                     $('<th scope="row" abbr="Model" class="spec">')
                        .addClass("tableCell")
                        .text(cellText)
                        .appendTo(trow);

                     var ddlselectroom = '<td class="spectd"><select class="selectbox" id=' + value + '>';
                     for (var d = 1; d <= count; d++) {
                         ddlselectroom += '<option value="' + d + '">Bur nr. ' + d + '</option>';
                     }

                     ddlselectroom += '</select></td>';
                     $(ddlselectroom).appendTo(trow);
             trow.appendTo(tbody);
     } 

//Some more code...
//And then the table which gets populated with the random number of dropdownlists:
<table id="tblRooms" width="100%">
    <tr>
</tr>
    </table>

The Viewmodel looks like this:

    public class EditBookingPensionViewModel
{
    public Booking Booking { get; set; }
    public IEnumerable<Customer> customerList { get; set; }
    public List<string> deliveryTypes { get; set; }
    public List<SelectListItem> customersToPension { get; set; }
    public Customer customer { get; set; }
    public CustomerInfoModel CustomerInfo { get; set; }

My partialview with the customerinfo looks like this:

@model HundePensionBooking.Models.Customer

So when I make the httppost call

<input type="submit" value="Create" />

I need to get all the data down to my database. Im not sure on how to do that but I assume I have to do it with my Create method in the controller class

[HttpPost]
    public ActionResult Create(EditBookingPensionViewModel model)
    {
        //SaveCustomer... From the CustomerInfo partialview
        //SaveBooking...From Index view
        //Save all the data from all the dropdownlists... from index view
    }

Answer 1

just add a hidden field of counter, when you submit, get value of counter then loop from 1 to value of counter and request optionname + counter. jquery should be used to set the value of counter.