create shift new

@page "{handler?}"
@model Platibus.Web.Pages.Booking.Booking_CreateShiftModel

@{
    ViewData["Title"] = "User Index";

}





<div class="row justify-content-lg-center">
    <div class="col-lg-10">
        <div class="box">
            <div class="box-header with-border">
                <h3 class="box-title text-primary"><i class="fas fa-user"></i>  Administrative Page</h3>
                <div class="box-tools pull-right">
                    <button type="button" class="btn btn-box-tool" data-widget="collapse" data-toggle="tooltip"
                            title="Collapse">
                        <i class="fa fa-minus"></i>
                    </button>
                    <button type="button" class="btn btn-box-tool" data-widget="remove" data-toggle="tooltip" title="Remove">
                        <i class="fa fa-times"></i>
                    </button>
                </div>
            </div>
            <div class="box-body center-admin">


                <!-- Content -->

                <div class="row justify-content-center">
                    <div class="col-md-4 center-div">
                        <form method="post">
                            <div class="form-group">
                                <label asp-for="shift.ShiftStart" class="control-label"></label>
                                <input asp-for="shift.ShiftStart" class="form-control" />

                            </div>
                            <div class="form-group">
                                <label asp-for="shift.ShiftEnd" class="control-label"></label>
                                <input asp-for="shift.ShiftEnd" class="form-control" />
                            </div>

                            <div class="form-group">
                                <label  class="control-label">How many of this shift</label> <br></br>
                                <input type="number" asp-for="numberOfShifts"/>
                            </div>


                            <div class="form-group">
                                <input type="hidden" asp-for="shift.id"/>
                                <button type="submit" asp-page-handler="CreateShift" class="far fa-check-square fa-4x"></button>
                            </div>
                        </form>
                    </div>
                </div>
                <!-- End content -->
            </div>
        </div>
    </div>
</div>




using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.AspNetCore.Mvc.Rendering;
using Platibus.Web.Acquaintance.IDataServices;
using Platibus.Web.DataServices.Models.Shift;
using Platibus.Web.DataServices.Models.User;

namespace Platibus.Web.Pages.Booking
{
    public class Booking_CreateShiftModel : PageModel
    {
        private readonly IShiftDataService _shiftDataService;
        private readonly IUserDataService _userDataService;

        [BindProperty]
        public Shift shift { get; set; }

        [BindProperty]
        public List<SelectListItem> UserList { get; set; }

        [BindProperty]
        public User user { get; set; }

        [BindProperty]
        public int numberOfShifts { get; set; }

        public Booking_CreateShiftModel(IShiftDataService shiftDataService , IUserDataService userDataService)
        {
            _shiftDataService = shiftDataService;
            _userDataService = userDataService;
        }


        public async Task OnGetAsync(DateTime dateTime)
        {

            Console.WriteLine();

            var users = await _userDataService.ListUsersAsync(2, 2);
            UserList = users.Select(x => new SelectListItem()
            {
                Text = x.Name,
                Value = x.Id.ToString()
            }).ToList();


        }

        public async Task<IActionResult> OnPostCreateShiftAsync(User user , Shift shift , int numberOfShifts)
        {

            var list = new ListOfShifts();
            list.listOfShifts = new List<Shift>();


            for (int i = 0; i < numberOfShifts; i++)
            {
                list.listOfShifts.Add(new Shift{ShiftEnd = shift.ShiftEnd , ShiftStart = shift.ShiftStart});


            }

            var result = _shiftDataService.CreateManyShifts(list);



            return RedirectToPage("/Booking/Booking_index");
        }


        public async Task OnGetTestAsync(string date)
        {


        }




    }
}



  <div class="box-body">



                    <div class="center">
                        <div class="form-group">

                            <a asp-page="./Booking_CreateShift">
                                <i class="fas fa-plus fa-5x"></i>
                                <p style="margin-left: -40px;">Click to add a new shift</p>
                            </a>
                        </div>

                    </div>

            </div>