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.ASPxGridView;
using DevExpress.Web.ASPxEditors;
using System.Collections;
using DevExpress.Web.ASPxClasses;

public partial class Order : System.Web.UI.Page {
    Hotel hotel = null;
    
    protected Hotel Hotel {
        get {
            if(hotel == null)
                hotel = Data.Instance.Hotels.Find(h => h.Title == ParseHotelTitle());
            if(hotel == null)
                Response.Redirect("Default.aspx");
            return hotel;
        }
    }
    protected Hashtable RoomsQuantityState { get; set; }

    protected void Page_Init(object sender, EventArgs e) {
        gvRoomsOrder.DataSource = Hotel.Rooms;
        rptHotelService.DataSource = Hotel.HotelServices;
        rptRoomServices.DataSource = Hotel.RoomServices;
        descContainer.InnerHtml = Hotel.Description;
    }
    protected void Page_Load(object sender, EventArgs e) {
        if(!IsPostBack) {
            deCheckIn.MinDate = DateTime.Now;
            deCheckOut.MinDate = DateTime.Now.AddDays(1);

            lblTitle.Text = Hotel.Title;
            imgHotel.ImageUrl = Utils.GetImageUrl(Hotel.ImageUrl, Utils.OrderImageSize);
            lblDestination.Text = string.Format("{0}, {1}", Hotel.City, Hotel.Country.Name);
            lblStars.Text = Hotel.Stars.ToString();

            gvRoomsOrder.DataBind();
            rptHotelService.DataBind();
            rptRoomServices.DataBind();

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

            SearchQuery query = Data.Instance.CurrentQuery;
            if(query != null) {
                deCheckIn.Value = query.FromDate;
                deCheckOut.Value = query.ToDate;
            }
        }
        if(IsPostBack)
            SaveRoomsQuantityState();
        deCheckOut.ClientEnabled = deCheckIn.Value != null;
        if(!IsCallback)
            UpdateRating();
        lblTotalPrice.Text = GetTotalPrice();
    }
    protected string GetTotalPrice() {
        int totalValue = 0;
        for(int i = 0; i < gvRoomsOrder.VisibleRowCount; i++) {
            if(gvRoomsOrder.Selection.IsRowSelected(i)) {
                int price = Convert.ToInt32(gvRoomsOrder.GetRowValues(i, "Price"));
                ASPxSpinEdit seQuantity = (ASPxSpinEdit)gvRoomsOrder.FindRowCellTemplateControl(i,
                    (GridViewDataColumn)gvRoomsOrder.Columns["Quantity"], "seQuantity");
                totalValue += price * (int)seQuantity.Number;
            }
        }
        if(deCheckIn.Value != null && deCheckOut.Value != null) {
            TimeSpan span = (DateTime)deCheckOut.Value - (DateTime)deCheckIn.Value;
            int days = span.Ticks > 0 && span.Days == 0 ? 1 : span.Days;
            totalValue *= days;
        }
        return totalValue > 0 ? totalValue.ToString() : "0";
    }
    protected string GetChildrenText(GridViewDataItemTemplateContainer container) {
        Room room = container.Grid.GetRow(container.VisibleIndex) as Room;
        return room.Children > 0 ? string.Format("0-{0}", room.Children) : "0";
    }
    protected void UpdateRating() {
        rcHotelRating.Value = Hotel.Rating;
        lblHotelRating.Text = Hotel.Rating.ToString("F1");
        lblHotelVotes.Text = Hotel.VoteCounter.ToString();
    }
    protected void ASPxButton1_Click(object sender, EventArgs e) {
        Response.Redirect("Default.aspx");
    }
    protected void cpHotelRating_Callback(object sender, CallbackEventArgsBase e) {
        if(Hotel.VoteAdresses.Keys.Contains(Request.UserHostAddress)) {
            Hotel.Rating = (Hotel.Rating * Hotel.VoteCounter - Hotel.VoteAdresses[Request.UserHostAddress]) / (Hotel.VoteCounter - 1);
            Hotel.VoteAdresses[Request.UserHostAddress] = rcHotelRating.Value;
        } else {
            Hotel.VoteAdresses.Add(Request.UserHostAddress, rcHotelRating.Value);
            Hotel.VoteCounter++;
        }
        Hotel.Rating = (Hotel.Rating * (Hotel.VoteCounter - 1) + rcHotelRating.Value) / (Hotel.VoteCounter);
        UpdateRating();
    }
    protected void deCheckIn_Validation(object sender, ValidationEventArgs e) {
        Utils.ValidateCheckInDate(e);
    }
    protected void deCheckOut_Validation(object sender, ValidationEventArgs e) {
        Utils.ValidateCheckOutDate((DateTime)deCheckIn.Value, e);
    }
    protected void seQuantity_Load(object sender, EventArgs e) {
        if(RoomsQuantityState != null)
            LoadRoomsQuantityState(sender as ASPxSpinEdit);
    }
    void SaveRoomsQuantityState() {
        RoomsQuantityState = new Hashtable();
        for(int i = 0; i < gvRoomsOrder.VisibleRowCount; i++) {
            ASPxSpinEdit se = gvRoomsOrder.FindRowCellTemplateControl(i, gvRoomsOrder.Columns["Quantity"] as GridViewDataColumn, "seQuantity") as ASPxSpinEdit;
            RoomsQuantityState[gvRoomsOrder.GetRowValues(i, "Id")] = se.Value;
        }
    }
    void LoadRoomsQuantityState(ASPxSpinEdit se) {
        object roomKey = ((GridViewDataItemTemplateContainer)se.NamingContainer).KeyValue;
        se.Value = RoomsQuantityState[roomKey];
    }
    string ParseHotelTitle() {
        string urlTitle = Request.QueryString["h"];
        return string.IsNullOrEmpty(urlTitle) ? string.Empty : urlTitle.Replace("_", " ").Replace("AMP", "&");
    }
}