Проект 15: listBox - Магазин за мебели

double price = 0.0;

        double sum = 0.0;

        int br = 0;

        private void Form1_Load(object sender, EventArgs e)

        {

            listBox1.Items.Add("Table");

            listBox1.Items.Add("Chair");

            listBox1.Items.Add("Desk");

            listBox2.Items.Add(120);

            listBox2.Items.Add(64);

            listBox2.Items.Add(50);

        }

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)

        {

            listBox2.SelectedIndex = listBox1.SelectedIndex;

        }

        private void button1_Click(object sender, EventArgs e)

        {

            try

            {

            br = Convert.ToInt32(textBox1.Text);

            price = Convert.ToDouble(listBox2.SelectedItem);

            sum = sum + br * price;

            textBox2.Text = Convert.ToString(sum);

            }

            catch (Exception ex)

            { MessageBox.Show(ex.Message); }

        }

        private void button2_Click(object sender, EventArgs e)

        {

            sum = 0.0;

            textBox2.Text = "";

            textBox1.Text = "";

        }

    }