private void button2_Click(object sender, EventArgs e)
{
this.Hide();
viewDepartment vd = new viewDepartment();
vd.ShowDialog();
this.Show();
}
private void button5_Click(object sender, EventArgs e)
{
OracleCommand cmd = new OracleCommand();
cmd.Connection = conn;
cmd.CommandText = "insert into department(dept_id,name,hod_name,office_no) values(" + textBox2.Text + ",'" + textBox1.Text + "','" + textBox3.Text + "'," + textBox4.Text + ")";
cmd.CommandType = CommandType.Text;
viewDepartment f = new viewDepartment();
String a = textBox1.Text;
f.comboBox1.Items.Add(item: a);
f.AddDept(a);
cmd.ExecuteNonQuery();
label2.Show();
}