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- using System;
- using System.Collections.Generic;
- using System.ComponentModel;
- using System.Data;
- using System.Drawing;
- using System.Linq;
- using System.Text;
- using System.Threading.Tasks;
- using System.Windows.Forms;
- namespace WindowsFormsApp4
- {
- public partial class Form1 : Form
- {
- public Form1()
- {
- InitializeComponent();
- button1.Click += button1_Click;
- button2.Click += button2_Click;
- openFileDialog1.Filter = "Text files(*.txt)|*.txt|All files(*.*)|*.*";
- saveFileDialog1.Filter = "Text files(*.txt)|*.txt|All files(*.*)|*.*";
- }
- private void textBox1_TextChanged(object sender, EventArgs e)
- {
- }
- private void button1_Click(object sender, EventArgs e)
- {
- if (openFileDialog1.ShowDialog() == DialogResult.Cancel) return;
- // получаем выбранный файл
- string filename = openFileDialog1.FileName;
- // читаем файл в строку
- string fileText = System.IO.File.ReadAllText(filename);
- textBox1.Text = fileText;
- MessageBox.Show("Файл открыт");
- }
- private void Form1_Load(object sender, EventArgs e) { }
- private void button2_Click(object sender, EventArgs e)
- {
- if (saveFileDialog1.ShowDialog() == DialogResult.Cancel) return;
- // получаем выбранный файл
- string filename = saveFileDialog1.FileName;
- // сохраняем текст в файл
- System.IO.File.WriteAllText(filename, textBox1.Text);
- MessageBox.Show("Файл сохранен");
- textBox1.Clear();
- }
- void hui()
- {
- Random r = new Random();
- int N = r.Next(200);
- for (int i = 2; i <= N; i++)
- {
- if (isSimple(i))
- {
- textBox1.Text += (i.ToString() + " ");
- }
- }
- }
- private static bool isSimple(int N)
- {
- for (int i = 2; i < (int)(N / 2); i++)
- {
- if (N % i == 0)
- return false;
- }
- return true;
- }
- private void button3_Click(object sender, EventArgs e)
- {
- textBox1.Clear();
- hui();
- }
- private void button1_Click_1(object sender, EventArgs e)
- {
- }
- }
- }
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