private void button2_Click(object sender, EventArgs e)
{
Poezdki poezdki = new Poezdki();
poezdki.number = dataGridView1.CurrentRow.Index + 1;
poezdki.s = 0;
poezdki.Show();
}
private void button1_Click(object sender, EventArgs e)
{
Poezdki poezdki = new Poezdki();
int s = dataGridView1.RowCount;
poezdki.number = int.Parse(dataGridView1[0, s - 1].Value.ToString()) + 1;
poezdki.ShowDialog();
}