avalonia_pril/reactivepril/ViewModels/Page2ViewModel.cs

using Avalonia.Controls.ApplicationLifetimes;
using reactivepril.Models;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Avalonia;
using Avalonia.Platform.Storage;
using Avalonia.Media.Imaging;
using System.IO;
using ReactiveUI;
using Avalonia.Media.TextFormatting;
using Avalonia.Controls;

namespace reactivepril.ViewModels
{
    public class Page2ViewModel : ReactiveObject
	{
        public Galochkin41pContext db = new Galochkin41pContext();

        List<User> users;
        List<User> users0;
        User editedUser;
        List<Gender> genderList;
        string textFind;
        Gender filteredGender;
        Bitmap imageUser;
        UserControl page;
        MainWindowViewModel MainVM;

        int id;
        public User EditedUser { get => editedUser; set => this.RaiseAndSetIfChanged(ref editedUser, value); }
        public List<User> Users0 { get => users0; set => this.RaiseAndSetIfChanged(ref users0, value); }
        public List<User> Users { get => users; set => this.RaiseAndSetIfChanged(ref users, value); }
        public List<Gender> GenderList { get => genderList; set => this.RaiseAndSetIfChanged(ref genderList, value); }
        public string TextFind { get => textFind; set { textFind = value; AllFilters(); } }
        public Gender FilteredGender { get => filteredGender; set { filteredGender = value; AllFilters(); } }

        public Bitmap ImageUser { get => imageUser; set => this.RaiseAndSetIfChanged(ref imageUser, value); }
        public UserControl Page { get => page; set => this.RaiseAndSetIfChanged(ref page, value); }
        public MainWindowViewModel MainVM1 { get => MainVM; set => this.RaiseAndSetIfChanged(ref MainVM, value); }
        public int Id { get => id; set => this.RaiseAndSetIfChanged(ref id, value); }

        public Page2ViewModel()
        {
            users = db.Users.ToList();
            GenderList = db.Genders.ToList();
            genderList.Add(new Gender() {IdGender = 0, NameGender = "ñáðîñèòü ôèëüòðû" });
            users0 =users;
            filteredGender = genderList.FirstOrDefault(x => x.IdGender == 0);
        }

        public void OnTextFindChanged(string value) => AllFilters();

        void AllFilters()
        {
            Users = Users0;
            if (!string.IsNullOrEmpty(TextFind)) Users = Users.Where(x => x.Name.Contains(TextFind)).ToList();
            if (filteredGender != null && filteredGender.IdGender != 0) Users = Users.Where(x => x.GendersNavigation == filteredGender).ToList();
            
        }

        public void GoBack()
        {
            MainWindowViewModel.Self.Page = new Page1();
        }
        public void GoToProf(int id)
        {
            MainWindowViewModel.Self.Page = new Page2Next(id);
        }
    }
}