avalonia/AvaloniaApplication1/ViewModels/UserMainViewModel.cs

using AvaloniaApplication1.Models;
using ReactiveUI;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace AvaloniaApplication1.ViewModels
{
    public class UserMainViewModel : ViewModelBase
    {
        private readonly ApiService _apiService;
        User user;
        List<Gender> genders;
        string info;
        bool isLoading;
        public bool IsLoading { get => isLoading; set => this.RaiseAndSetIfChanged(ref isLoading, value); }
        bool isDataLoaded;
        public bool IsDataLoaded{ get => isDataLoaded; set => this.RaiseAndSetIfChanged(ref isDataLoaded, value); }

        public User CurrentUser
        {
            get => user; set
            {
                Info = "";
                user = value;
            }
        }
        public string Info { get => info; set => this.RaiseAndSetIfChanged(ref info, value); }
        public List<Gender> Genders { get => genders; set => this.RaiseAndSetIfChanged(ref genders, value); }
        public Gender selectedGender;
        public Gender SelectedGender
        {
            get => selectedGender; set
            {
                selectedGender = value;
                Info = "";
            }
        }

        public UserMainViewModel(int id)
        {
            _apiService = new ApiService();
            LoadDataAsync(id);

        }


        private async void  LoadDataAsync(int id)
        {
            IsLoading = true;
            IsDataLoaded = false;
            try
            {
                CurrentUser = await _apiService.GetAsync<User>($"getUserById?id={id}");
                genders = await _apiService.GetAsync<List<Gender>>("getGenders");
                selectedGender = CurrentUser.GenderNavigation;
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Îøèáêà ïðè âûçîâå API: {ex.Message}");
            }
            finally { IsLoading = false; IsDataLoaded = true; }
        }


        public bool IsNotLoading { get => !IsLoading; }  


        public DateTimeOffset DateTimeOffset
        {
            get
            {
                if (CurrentUser != null)
                { new DateTimeOffset(CurrentUser.DateOfBirth, TimeSpan.Zero); }
                return DateTimeOffset.Now;
            }
            set
            {
                if (CurrentUser != null)
                {  }
                else
                {
                    CurrentUser.DateOfBirth = new DateTime(value.Year, value.Month, value.Day);
                    Info = "";
                }
                
            }
        }
        public void Save()
        {
            try
            {
                myConnection.SaveChanges();
                Info = "Äàííûå óñïåøíî ñîõðàíåíû";
            }
            catch (Exception ex)
            {
                Info = $"Îøèáêà: {ex.Message}";
            }
        }
    }
}