UP_Travel_Agency/travel/ViewModels/HotelPageViewModel.cs

using Microsoft.EntityFrameworkCore;
using ReactiveUI;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using travel.Models;

namespace travel.ViewModels
{
    public class HotelPageViewModel : ReactiveObject
    {
        List<Hotel> listHotels = MainWindowViewModel.myConnection.Hotels.Skip(0).Take(10).ToList();
        string countElem = "10";
        int schet = 0;
        string t1 = "0";
        string t2 = "0";
        public List<Hotel> ListHotels { get => listHotels; set => this.RaiseAndSetIfChanged(ref listHotels, value); }
        public string T1 { get => t1; set => this.RaiseAndSetIfChanged(ref t1, value); }
        public string T2 { get => t2; set => this.RaiseAndSetIfChanged(ref t2, value); }
        public string CountElem
        {
            get
            {
                number();
                return countElem;
            }
            set
            {
                if (value != string.Empty)
                    countElem = value;
                else countElem = "1";
                CE();
            }
        }
        public void number()
        {
            if (MainWindowViewModel.myConnection.Hotels.ToList().Count % Convert.ToInt32(countElem) == 0)
                T2 = (MainWindowViewModel.myConnection.Hotels.ToList().Count / Convert.ToInt32(countElem)).ToString();
            else
                T2 = (MainWindowViewModel.myConnection.Hotels.ToList().Count / Convert.ToInt32(countElem) + 1).ToString();
            T1 = (schet + 1).ToString();
        }
        public void CE()
        {
            if(countElem != string.Empty || countElem != "0" || countElem != "")
                ListHotels = MainWindowViewModel.myConnection.Hotels.Skip(0).Take(Convert.ToInt32(countElem)).ToList();
            else
                ListHotels = MainWindowViewModel.myConnection.Hotels.ToList();
        }
        public void Start()
        {
            ListHotels = MainWindowViewModel.myConnection.Hotels.Skip(0).Take(Convert.ToInt32(countElem)).ToList();
            schet = 0;
            number();
        }
        public void End()
        {
            int c = Convert.ToInt32(countElem) * (MainWindowViewModel.myConnection.Hotels.ToList().Count / Convert.ToInt32(countElem));
            ListHotels = MainWindowViewModel.myConnection.Hotels.Skip(c).Take(Convert.ToInt32(countElem)).ToList();
            if (MainWindowViewModel.myConnection.Hotels.ToList().Count % Convert.ToInt32(countElem) == 0)
                schet = MainWindowViewModel.myConnection.Hotels.ToList().Count / Convert.ToInt32(countElem)-1;
            else
                schet = MainWindowViewModel.myConnection.Hotels.ToList().Count / Convert.ToInt32(countElem);
            number();
        }
        public void Back()
        {
            if (schet != 0)
                schet--;
            ListHotels = MainWindowViewModel.myConnection.Hotels.Skip(schet * Convert.ToInt32(countElem)).Take(Convert.ToInt32(countElem)).ToList();
            number();

        }
        public void Next()
        {
            if (schet < Convert.ToInt32(T2)-1)
                schet++;
            ListHotels = MainWindowViewModel.myConnection.Hotels.Skip(schet * Convert.ToInt32(countElem)).Take(Convert.ToInt32(countElem)).ToList();
            number();
        }

    }
}