How to fill select option order type after search submit on post funct

I work on asp.net core razor page model .I face issue i can't store result of select option ajax request that fill order type 

to fill it after serach reset submit done

because after search button click order type select option reset 

so i need to fill select option again of data that have before submit or before reset

so I get data list fill select option order type success on function RelatedOrderType with 

reprintModel.OrderTypes = orderTypes;

How to get result or store result of reprintModel.OrderTypes = orderTypes; on funcion OnPost after search submit done

meaning how to get result of ajax request onPost function after search submit finish

$('#orderType-select').prepend('-- Select Order Type --');

my code details as below 

 




    

        

            
            

                
                OrderType
                
                --Select--

                @foreach (var ordertype in Model.reprintModel.OrderTypes)
                {
                    @ordertype.OrderTypes
                }
                
            
            
        
    

$('#totimeselect').change(function (event) {
    //event.preventDefault();
    var DateLogged = $("#statusDateId").val();
    var branchId = $("#branch-select").val();
    var FromTime = $("#txtFromTime").val();
    var ToTime = $("#totimeselect").val();
    console.log(branchId);
    if (DateLogged) {
        console.log(DateLogged);
        $.ajax({

            url: '?handler=RelatedOrderType',
            type: "GET",
            dataType: "json",

            data: { branchId: branchId, DateLogged: DateLogged, FromTime: FromTime, ToTime: ToTime },
            success: function (data) {
                //console.log(data);
                 $('#orderType-select').empty();
                $.each(data, function (i, item) {
                    console.log(item);
                    $('#orderType-select').append($('', {
                        value: item.orderTypes,
                        text: item.orderTypes
                    }));
                });
                // Add a default option
                $('#orderType-select').prepend('-- Select Order Type --');
            }
        });
    }
});

public JsonResult OnGetRelatedOrderType(string branchId, string DateLogged,string FromTime,string ToTime)
{
    string eventDatefromtime = Convert.ToDateTime(FromTime).ToString("HH:mm");
    string eventDatetotime = Convert.ToDateTime(FromTime).AddMinutes(Convert.ToInt16(ToTime)).ToString("HH:mm");


    DataTable dtordertype = _IAdcSupportService.GetOrderTypes(branchId, DateLogged, eventDatefromtime, eventDatetotime);

    List orderTypes = dtordertype.AsEnumerable()
	.Select(row => new OrderTypePrinterServer
   {
	// Map the values from the DataRow to the properties of the PrintServer object
	OrderTypes = row["Doc_type"].ToString()

   })
   .ToList();
    reprintModel.OrderTypes = orderTypes;
    return new JsonResult(orderTypes);
}

Now I click on search button to display data 
so OnPost Function will fire 

public async Task OnPost(IFormCollection formcollection)
{
//after search data and data display select option order type will reset so I will fill again

reprintModel.OrderTypes = orderTypes;
}