Test1/WindowsFormsApp1/Form1.cs

using Microsoft.Office.Interop.Word;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;
using word = Microsoft.Office.Interop.Word;

namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public double RateNorm = 0.7;
        public double RateNorm2 = 0.3;
        public double ExcessTariff = 1.6;
        public int MinutesTariff1 = 200;
        public int MinutesTariff2=100;
        public Form1()
        {
            InitializeComponent();
        }

        private void Calculate_Click(object sender, EventArgs e)
        {
          
            try
            {
                string Minute1 = Minutes.Text;
                if (!ANGLTEXT(Minute1))
                {
                    throw new Exception("Некорректное значение. Введите целое число.");
                }
                int Minute = Convert.ToInt32(Minutes.Text);
                if (Minute > 0 && Minute <= 4000)
                {
                    if(radioButton1.Checked==true) 
                    {
                        if (Minute > MinutesTariff1)
                        {
                            double MinuteFact = MinutesTariff1 * RateNorm + ((Minute- MinutesTariff1) * ExcessTariff);
                            int MinuteUp = Minute - MinutesTariff1;
                            Summ.Text = "Минут свверх установленной нормы: "+ MinuteUp;
                            SummIt.Text = "К оплате: " + MinuteFact;
                            Summ.Visible = true;
                        }
                        else
                        {
                            double MinuteFact = Minute * RateNorm;
                            SummIt.Text = "К оплате: " + MinuteFact;
                        }
                    }
                    if(radioButton2.Checked == true)
                    {
                        if (Minute > MinutesTariff2)
                        {
                            double MinuteFact = MinutesTariff2 * RateNorm2 + ((Minute - MinutesTariff2) * ExcessTariff);
                            int MinuteUp = Minute - MinutesTariff2;
                            Summ.Text = "Минут свверх установленной нормы: " + MinuteUp;
                            SummIt.Text = "К оплате: " + MinuteFact;
                            Summ.Visible = true;
                        }
                        else
                        {
                            double MinuteFact = Minute * RateNorm2;
                            SummIt.Text = "К оплате: " + MinuteFact;
                        }
                    }
                    else if(radioButton1.Checked == false&& radioButton2.Checked == true)
                    {
                        MessageBox.Show("Выберите тариф!");
                    }
                    
                }
                else
                {
                    MessageBox.Show("Значение должно быть между 0 и 4000.");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                Close();
            }               
        }
        public bool ANGLTEXT(string input)
        {
            return !string.IsNullOrEmpty(input)&& Regex.IsMatch(input,@"^\d+$")&&!Regex.IsMatch(input,  @"[а-яА-Я]");
        }
        

 

        private void Minutes_KeyPress(object sender, KeyPressEventArgs e)
        {

        }

        private void button2_Click(object sender, EventArgs e)
        {
            DateTime Date1 = DateTime.Now;
            string Tariff = "";
            if (radioButton1.Checked == true)
            {
                 Tariff = "Тариф 1";
            }
            if (radioButton2.Checked == true)
            {
                 Tariff = "Тариф 2";
            }
            string summ = SummIt.Text;

            word.Document document = null;
            word.Application app = new word.Application();
            string putword = Environment.CurrentDirectory.ToString() + @"C:\Users\Евгений\source\repos\WindowsFormsApp1\WindowsFormsApp1\res\Шаблон.docx";
            document = app.Documents.Add(putword);
            document.Activate();
            word.Bookmarks bookm = document.Bookmarks;
            word.Range range;
            string[] data = new string[3] { Convert.ToString(Date1), Tariff, summ };
            int i = 0;
            foreach (word.Bookmark mark in bookm)
            {
                range = mark.Range;
                range.Text = data[i];
                i++;
            }
            document.SaveAs2(Environment.CurrentDirectory.ToString() + @"\Сертификат.docx");
            MessageBox.Show("Сертификат сохранен по пути: " + Environment.CurrentDirectory.ToString());
            document.Close();
            document = null;

        }
    }
}