private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
ado_project d = new ado_project();
string person = "";
string address = "";
Int64 ph = 0;
string name = comboBox1.Text;
d.select_data(name, ref person, ref address, ref ph);
textBox2.Text = person;
textBox1.Text = address;
maskedTextBox1.Text = ph.ToString();
}