Unable to bind field of type int in asp.net core - asp.net

Question

I'm trying to save data in database but the problem i'm facing is that Every data of fields is binding with model except integer type fields it bind 0 to them.
I gives value in the fields but instead of those value it bind 0 to them.
Can anyone help me with this that how do i solve this problem.
This is the View about which i'm facing the problem.
The Fields which are not binding is Adult,Children,Senior and Travelers
#model Airline.Models.BookingModel
#{
ViewData["Title"] = "Buy";
}
<h2>Buy</h2>
<h4>BookingModel</h4>
<hr />
<div class="row">
<div class="col-md-4">
<form asp-action="Buy">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<input asp-for="FlightSkyMiles" type="hidden" value="#ViewBag.Flight.SkyMiles" />
<div class="form-group">
<label asp-for="FlightName" class="control-label"></label>
<input asp-for="FlightName" value="#ViewBag.Flight.FlightName" class="form-control" readonly />
<span asp-validation-for="FlightName" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="FlightNo" class="control-label"></label>
<input asp-for="FlightNo" value="#ViewBag.Flight.FlightNo" class="form-control" readonly />
<span asp-validation-for="FlightNo" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="OriginCity" class="control-label"></label>
<input asp-for="OriginCity" value="#ViewBag.Flight.OriginCity" class="form-control" readonly />
<span asp-validation-for="OriginCity" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="DestinationCity" class="control-label"></label>
<input asp-for="DestinationCity" value="#ViewBag.Flight.DestinationCity" class="form-control" readonly />
<span asp-validation-for="DestinationCity" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Departure" class="control-label"></label>
<input asp-for="Departure" type="datetime" value="#ViewBag.Flight.Departure" class="form-control" readonly />
<span asp-validation-for="Departure" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Adult" class="control-label"></label>
<input asp-for="Adult" type="number" name="seats" value="0" class="form-control" id="adult" />
<span asp-validation-for="Adult" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Children" class="control-label"></label>
<input asp-for="Children" type="number" name="seats" value="0" class="form-control" id="childern" />
<span asp-validation-for="Children" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Senior" class="control-label"></label>
<input asp-for="Senior" type="number" name="seats" value="0" class="form-control" id="senior" />
<span asp-validation-for="Senior" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Travelers" class="control-label"></label>
<input asp-for="Travelers" type="number" name="TotalSeats" class="form-control" id="total" readonly required />
<span asp-validation-for="Travelers" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="FlightClass" class="control-label"></label>
<select class="form-control" onchange="getPrice(#ViewBag.Flight.Id)" asp-for="FlightClass" id="fclass" asp-items="Html.GetEnumSelectList<Classtype>()" itemid="" required>
<option selected="selected" value="">Please select</option>
</select>
<span asp-validation-for="FlightClass" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Price" class="control-label"></label>
<input asp-for="Price" onchange="multPrice()" id="price" class="form-control" readonly />
<span asp-validation-for="Price" class="text-danger"></span>
</div>
<div class="form-group">
<input type="radio" name="Reservation" value="Buy" required /> Buy
<input type="radio" name="Reservation" value="Block" /> Block
<span asp-validation-for="ReservationType" class="text-danger"></span>
</div>
<div class="form-group">
<input type="submit" value="Submit" class="btn btn-default" />
</div>
</form>
</div>
</div>
<div>
<a asp-action="Index">Back to List</a>
</div>
#section scripts
{
<script type="text/javascript" src="~/lib/jquery/dist/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function (e) {
function calculate() {
var adult = parseInt($("#adult").val());
var chi = parseInt($("#childern").val());
var sen = parseInt($("#senior").val());
$("#total").val(adult + chi + sen);
};
$("#adult").keyup(calculate);
$("#childern").keyup(calculate);
$("#senior").keyup(calculate);
});
</script>
}
<script>
function getPrice(id) {
function multPrice()
{
var mult = $("#total").val() * $("#price").val();
$("#price").val(mult);
}
$.ajax
({
url: '/Home/getPrice',
type: 'post',
data: { id:id,classId: $("#fclass").val()},
success: function (result) {
$("#price").val(result.price);
multPrice();
},
error: function () {
alert("Error")
}
});
}
</script>