AvaloniaTaskFive/Auth/ViewModels/AuthVM.cs

using Auth.Models;
using Avalonia.Media;
using Avalonia.Styling;
using ReactiveUI;
using System;
using System.Drawing;
using System.Security.Cryptography.X509Certificates;
using Avalonia.Controls;
using Avalonia.Controls.Shapes;
using System.Linq;
using Avalonia.Threading;
using MsBox.Avalonia.Enums;
using MsBox.Avalonia;

namespace Auth.ViewModels
{
    public class AuthVM : ReactiveObject
    {
        public DispatcherTimer timer = new DispatcherTimer();
        public string kod = "";
        public string _login = "";
        public string _password = "";
        public string prov = "";
        public string error = "";
        public bool ButtonVisible = true;
        public bool TextVisible = false;
        public bool _Enabled = true;


        public string Login
        {
            get
            {
                return _login;
            }
            set
            {
                this.RaiseAndSetIfChanged(ref _login, value);
            }
        }      

        public bool Enabled
        {
            get
            {
                return _Enabled;
            }
            set
            {
                this.RaiseAndSetIfChanged(ref _Enabled, value);
            }
        }

        public string Password
        {
            get
            {
                return _password;
            }
            set
            {
                this.RaiseAndSetIfChanged(ref _password, value);
            }
        }




        public bool Visible
        {
            get
            {
                return ButtonVisible;
            }
            set
            {
                this.RaiseAndSetIfChanged(ref ButtonVisible, value);
            }
        }

        public bool VisibleText
        {
            get
            {
                return TextVisible;
            }
            set
            {
                this.RaiseAndSetIfChanged(ref TextVisible, value);
            }
        }


        public string Proverka
        {
            get
            {
                return prov;
            }
            set
            {
                this.RaiseAndSetIfChanged(ref prov, value);
            }
        }

        public async void changeMessage()
        {
            ButtonResult result = await MessageBoxManager.GetMessageBoxStandard("Окно показа сообщения", "Вы ввели неправильные данные", ButtonEnum.Ok).ShowAsync();         
        }

        public async void changeMessage1()
        {
            ButtonResult result = await MessageBoxManager.GetMessageBoxStandard("Окно показа сообщения", "Вы ввели неправильные данные. Попробуйте снова.", ButtonEnum.Ok).ShowAsync();
        }

        public async void changeMessage2()
        {
            ButtonResult result = await MessageBoxManager.GetMessageBoxStandard("Окно показа сообщения", "Вы ввели неправильные данные. Попробуйте снова через 10 секунд.", ButtonEnum.Ok).ShowAsync();
        }

        public void timer_tick(object sender, EventArgs e)
        {
            Enabled = true;
        }

        private static Random random1 = new Random();
        public static string RandomString(int length)
        {
            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            return new string(Enumerable.Repeat(chars, length)
                .Select(s => s[random1.Next(s.Length)]).ToArray());
        }

        Canvas canva;

        public Canvas Canva
        {
            get => canva;
            set => this.RaiseAndSetIfChanged(ref canva, value);
        }
        public void CreateCaptcha()
        {
            kod = RandomString(7);
            Random rnd = new Random();
            SolidColorBrush color = new SolidColorBrush(Avalonia.Media.Color.FromRgb(Convert.ToByte(rnd.Next(256)), Convert.ToByte(rnd.Next(255)), Convert.ToByte(rnd.Next(255))));
            Canvas canvas = new Canvas()
            {
                Width = 400,
                Height = 400,
                Background = color
            };
            int nach = rnd.Next(0, 100);
            foreach (char s in kod)
            {
                nach = nach + 20 + rnd.Next(20);
                if (rnd.Next(2) == 0)
                {
                    TextBlock number = new TextBlock()
                    {
                        Text = s.ToString(),
                        FontSize = 50,
                        Foreground = Brushes.Black,
                        Padding = new Avalonia.Thickness(nach, nach + 20 + rnd.Next(20)),
                        FontWeight = FontWeight.Regular
                    };
                    canvas.Children.Add(number);
                }
                else if (rnd.Next(2) == 1)
                {
                    TextBlock number = new TextBlock()
                    {
                        Text = s.ToString(),
                        FontSize = 50,
                        Foreground = Brushes.Black,
                        Padding = new Avalonia.Thickness(nach, nach + 20 + rnd.Next(20)),
                        FontStyle = FontStyle.Italic
                    };
                    canvas.Children.Add(number);
                }
                else
                {
                    TextBlock number = new TextBlock()
                    {
                        Text = s.ToString(),
                        FontSize = 50,
                        Foreground = Brushes.Black,
                        Padding = new Avalonia.Thickness(nach, nach + 20 + rnd.Next(20)),
                        FontStyle = FontStyle.Italic,
                        FontWeight = FontWeight.Regular
                    };
                    canvas.Children.Add(number);
                }
            }
            for (int i = 0; i < 20; i++)
            {
                Line line = new Line()
                {
                    StartPoint = new Avalonia.Point(rnd.Next(400), rnd.Next(400)),
                    EndPoint = new Avalonia.Point(rnd.Next(400), rnd.Next(400)),
                    Stroke = new SolidColorBrush(Avalonia.Media.Color.FromRgb(Convert.ToByte(rnd.Next(250) + 3), Convert.ToByte(rnd.Next(250) + 3), Convert.ToByte(rnd.Next(250) + 3))),
                    StrokeThickness = 3
                };

                canvas.Children.Add(line);

                Canva = canvas;
            }

        }
    }
}