CulAvalonia/Culusas/ViewModels/CululViewModel.cs

using Culusas.Models;
using ReactiveUI;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Culusas.ViewModels
{
   public class CululViewModel : ReactiveObject
    {

        public double result;
        public string prover = "";
        public string oper = "0000";
        public int indexA = -1;
        public List<string> deistV => PiusMinusITD.Deistvia;



        public double InitA
        {
            get => PiusMinusITD.a;
            set
            {
                this.RaiseAndSetIfChanged(ref PiusMinusITD.a, value);
            }
        }
        public double InitB
        {
            get => PiusMinusITD.b;
            set
            {
                this.RaiseAndSetIfChanged(ref PiusMinusITD.b, value);
            }
        }
        public double Resultat
        {
            get => result;
            set
            {
                this.RaiseAndSetIfChanged(ref result, value);
            }
        }
        public string Provertik
        {
            get => prover;
            set
            {
                this.RaiseAndSetIfChanged(ref prover, value);
            }
        }

        public string Operator
        {
            get => oper;
            set
            {
                this.RaiseAndSetIfChanged(ref oper, value);
            }
        }
        public int Index
        {
            get => indexA;
            set
            {
                this.RaiseAndSetIfChanged(ref indexA, value);
                switch (indexA)
                {
                    case 0:
                        Operator = "+";
                        break;
                    case 1:
                        Operator = "-";
                        break;
                    case 2:
                        Operator = "*";
                        break;
                    case 3:
                        Operator = "/";
                        break;
                    default:
                        Operator = "!";
                        break;
                }
            }
        }

        public void DeistviaAandB()
        {
            switch (indexA)
            {
                case 0:
                    Resultat = InitA + InitB;
                    Provertik = Resultat.ToString();
                    break;
                case 1:
                    Resultat = InitA - InitB;
                    Provertik = Resultat.ToString();
                    break;
                case 2:
                    Resultat = InitA * InitB;
                    Provertik = Resultat.ToString();
                    break;
                case 3:
                    if (InitB != 0)
                    {
                        Resultat = InitA / InitB;
                        Provertik = Resultat.ToString();
                    }
                    else
                        Provertik = "Нельзя делить на 0!";
                    break;
                default:
                    Provertik = "Вы не заполнили поля или не выбрали действие!";
                    break;
            }
        }
    }
}