Mini Kabibi Habibi

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using DevExpress.Web.ASPxClasses;
using System.Reflection;
using DevExpress.Web.ASPxEditors;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Init(object sender, EventArgs e) {
        if(!IsPostBack)
            InitEditorsValues();
    }
    protected void btnSubmit_Click(object sender, EventArgs e) {
        if(ASPxEdit.ValidateEditorsInContainer(Page)) {
            InitializeSearchQuery();
            Response.Redirect("Results.aspx");
        }
    }
    protected void cmbCity_Callback(object source, CallbackEventArgsBase e) {
        string country = e.Parameter;
        if(string.IsNullOrEmpty(country)) return;
        cmbCity.DataSource = Data.Instance.Countries.Find(c => c.Name == country).Cities;
        cmbCity.DataBind();
    }
    protected void deCheckIn_Validation(object sender, DevExpress.Web.ASPxEditors.ValidationEventArgs e) {
        Utils.ValidateCheckInDate(e);
    }
    protected void deCheckOut_Validation(object sender, DevExpress.Web.ASPxEditors.ValidationEventArgs e) {
        Utils.ValidateCheckOutDate((DateTime)deCheckIn.Value, e);
    }

    void InitEditorsValues() {
        Utils.SetDefaultDateEditValues(deCheckIn, deCheckOut);

        ccPopularCountries.DataSource = Data.Instance.GetPopularCountries();
        ccPopularCountries.DataBind();

        rpExclusiveHotels.DataSource = Data.Instance.GetExclusiveHotels();
        rpExclusiveHotels.DataBind();

        cmbCountry.DataSource = Data.Instance.Countries;
        cmbCountry.DataBind();

        cmbRoomType.DataSource = Data.Instance.RoomTypes;
        cmbRoomType.DataBind();
        cmbRoomType.SelectedIndex = 0;

        cmbCity.ClientEnabled = false;

        cblHotelService.DataSource = Data.Instance.HotelServices;
        cblHotelService.DataBind();

        cblRoomService.DataSource = Data.Instance.RoomServices;
        cblRoomService.DataBind();
    }
    void InitializeSearchQuery() {
        Data.Instance.CurrentQuery = new SearchQuery() {
            Country = (string)cmbCountry.Value,
            City = (string)cmbCity.Value,
            MaxPrice = seMaxPrice.Value != null ? (decimal)seMaxPrice.Value : 0,
            FromDate = (DateTime)deCheckIn.Value,
            ToDate = (DateTime)deCheckOut.Value,
            RoomType = (string)cmbRoomType.Value,
            Adults = Convert.ToInt32(seAdults.Value),
            Children = Convert.ToInt32(seChildren.Value),
            Stars = cblHotelstars.SelectedValues.Cast<int>().ToArray(),
            HotelServices = cblHotelService.SelectedValues.Cast<string>().ToArray(),
            RoomServices = cblRoomService.SelectedValues.Cast<string>().ToArray()
        };
    }
}