private void button1_Click(object sender, EventArgs e)
{
Classes.Bus bus = new Classes.Bus();
DataTable data = new DataTable();
data = bus.GetPessangers(txtBusNo.Text);
dataGridView1.DataSource = data;
}
private void PessengerListForm_Load(object sender, EventArgs e)
{
Classes.Bus bus = new Classes.Bus();
DataTable data = new DataTable();
data = bus.GetPessangers(txtBusNo.Text);
dataGridView1.DataSource = data;
txtBusNo.Text = _busNo;
button1.PerformClick();
}