public void display_data()
{
var contex = new db_asuransiEntities();
var data = (from d in contex.Nasabah select d);
dataGridView1.DataSource = data.ToList();
}
private void button2_Click(object sender, EventArgs e)
{
var contex = new db_asuransiEntities();
var nasabah = new Nasabah();
var asuransi = new Asuransi_nasabah();
nasabah.nama_nasabah = textBox1.Text;
nasabah.no_identitas = Convert.ToInt32(textBox2.Text);
nasabah.tempat_lahir = textBox3.Text;
nasabah.tanggal_lahir = dateTimePicker1.Value.Date;
nasabah.jenis_kelamin = comboBox1.Text;
nasabah.status = textBox4.Text;
nasabah.pekerjaan = textBox5.Text;
nasabah.penghasilan = textBox6.Text;
nasabah.no_telp = Convert.ToInt32(textBox7.Text);
nasabah.alamat = textBox8.Text;
contex.Nasabah.Add(nasabah);
asuransi.id_nasabah = nasabah.id_nasabah;
asuransi.Jenis_asuransi = comboBox2.Text;
contex.SaveChanges();
display_data();
}