ProgOb/LAB_6/Form1.cs

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 LAB_6
{
  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }

    string[] meble = { "krzesło", "stół", "fotel", "szafa", "półka", "regał", "komoda" };
    Random rnd = new Random((int)DateTime.Now.Ticks);
    List<Mebel> lst = new List<Mebel>();

    private void button1_Click(object sender, EventArgs e)
    {
      listBox1.DataSource = null;
      lst.Clear();
      for (int i = 0; i < 100; i++)
      {
        Mebel m = new Mebel();
        m.Lp = rnd.Next(10000, 99999);
        m.Nazwa = meble[rnd.Next(meble.Length)];
        m.Cena= rnd.Next(500, 3000);
        lst.Add(m);
      }
      listBox1.DataSource = lst;
    }

    private void button2_Click(object sender, EventArgs e)
    {
      listBox1.DataSource = null;
      lst.Sort();
      listBox1.DataSource = lst;
    }

    private void button3_Click(object sender, EventArgs e)
    {
      listBox1.DataSource = null;
      lst.Sort(new ByNazwaComp());
      listBox1.DataSource = lst;
    }
  }
}