Authandreg_workNine/RegAuth/ViewModels/RegViewModel.cs

using System;
using System.Collections.Generic;
using Microsoft.EntityFrameworkCore.Infrastructure;
using ReactiveUI;
using RegAuth.Models;
using System.Security.Cryptography;
using System.Text;
using Microsoft.EntityFrameworkCore;
using System.Linq;
using System.Text.RegularExpressions;
using System.ComponentModel;
using System.Runtime.CompilerServices;
namespace RegAuth.ViewModels
{
	internal class RegViewModel : ViewModelBase, INotifyPropertyChanged
    {
        private readonly validViewModel _otherViewModel;

        public RegViewModel()
        {
            _otherViewModel = new validViewModel(); // Ñîçäàåì ýêçåìïëÿð validViewModel
        }

        User _newUser = new User();
        public User NewUser
        {
            get => _newUser;
            set => this.RaiseAndSetIfChanged(ref _newUser, value);
        }

        string _password;
        private string _passwordError;

        public string Password
        {
            get => _password;
            set
            {
                if (this.RaiseAndSetIfChanged(ref _password, value))
                {
                    // Ïðîâåðÿåì ïàðîëü è óñòàíàâëèâàåì ñîîáùåíèå îá îøèáêå
                    PasswordError = _otherViewModel.ValidatePassword(value);
                }
            }
        }

        public string PasswordError
        {
            get => _passwordError;
            private set
            {
                this.RaiseAndSetIfChanged(ref _passwordError, value); // Óâåäîìëÿåì îá èçìåíåíèè
            }
        }

        public void AddUser()
        {
            Console.WriteLine("Ó ìåíÿ óæå åñòü àäìèí");

            if (!string.IsNullOrEmpty(Password) && string.IsNullOrEmpty(PasswordError))//åñëè ó íàñ ïàðîëü íå ïóñò è îøèáîê íå íàáëþäàåòñÿ, òîãäà ìåòîä ðàáîòàåò äàëüøå è ðåàëèçóåò äîáàâëåíèå â áä
            {
                NewUser.Password = MD5.HashData(Encoding.ASCII.GetBytes(Password));
                NewUser.Roleid = 2;
                MainWindowViewModel.myConnection.Users.Add(NewUser);
                MainWindowViewModel.myConnection.SaveChanges();
                MainWindowViewModel.Instance.Uc = new Main();
            }
        }
        protected bool RaiseAndSetIfChanged<T>(ref T field, T value, [CallerMemberName] string propertyName = null)//ýòî íàì íàäî, ÷òîáû êîððåêòíî îáðàáîòàòü ðåçóëüòàò â RaiseAndSetIfChanged
        {
            if (EqualityComparer<T>.Default.Equals(field, value)) return false; // Åñëè çíà÷åíèå íå èçìåíèëîñü, âîçâðàùàåì false
            field = value; // Îáíîâëÿåì ïîëå
            OnPropertyChanged(propertyName); // Âûçûâàåì ñîáûòèå èçìåíåíèÿ ñâîéñòâà
            return true; // Âîçâðàùàåì true, åñëè çíà÷åíèå èçìåíèëîñü
        }
        public event PropertyChangedEventHandler PropertyChanged;
        public void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}