avaloniaProject/AvaloniaApplication5/ViewModels/PageUserCabinetViewModel.cs

using System;
using System.Collections.Generic;
using System.Linq;
using AvaloniaApplication5.Models;
using Microsoft.EntityFrameworkCore;
using ReactiveUI;

namespace AvaloniaApplication5.ViewModels
{
	public class PageUserCabinetViewModel : ReactiveObject
	{

        Logintable? currentUser;
        _1234Context dBConnect;
        string oldPass;
        public PageUserCabinetViewModel(_1234Context dBConnect, int idUser)
        {
            this.dBConnect = dBConnect;
            CurrentUser = dBConnect.Logintables.Include(x=>x.IdRoleNavigation).Include(x=>x.User.IdGenderNavigation).FirstOrDefault(x => x.Id == idUser);
            oldPass = currentUser.Password;
        }
        public PageUserCabinetViewModel(_1234Context dBConnect)
        {
            this.dBConnect = dBConnect;
            int maxid = dBConnect.Logintables.Select(x => x.Id).Max();
            currentUser = new Logintable() { User = new User() { IdLogin = ++maxid }, IdRole =2 };
            changePass = true;//÷òîáû èçìåíåíèå ïàðîëÿ áûëî àêèâíî
        }

        public Logintable? CurrentUser { get => currentUser; set => currentUser = value; }

        public List<Gender> Genders => dBConnect.Genders.ToList();

        public string DR { get => CurrentUser.User.BirthDate.ToString(); set => CurrentUser.User.BirthDate = DateTime.Parse(value); }
        public bool ChangePass { get => changePass; set =>this.RaiseAndSetIfChanged(ref changePass, value); }
        public string PasswordMatch { get => passwordMatch; set => passwordMatch = value; }
        public string Message { get => message; set =>this.RaiseAndSetIfChanged(ref message,value); }

        bool changePass = false;

        string passwordMatch;
        string message;

       public void SaveData()
        {
           if (CurrentUser.Password == null || CurrentUser.Password =="") CurrentUser.Password = oldPass; 
           if (changePass==(currentUser.Password == PasswordMatch))
            {
                if (currentUser.Id == 0) dBConnect.Add(currentUser);
                dBConnect.SaveChanges();
                Message = "Ñîõðàíåíî óñïåøíî";
            }
           else
            {
                Message = "Ïàðîëè íå ñîâïàäàþò";
            }           
        }
            
    }
}