private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (checkBox1.Checked)
{
textBoxDiachi.Visible = false;
textBoxKhachhang.Visible = false;
label9.Visible = false;
comboKhachhang.Visible = true;
List <Khachhang> lst = APIs.LstKhachhang();
foreach (Khachhang item in lst)
{
comboKhachhang.Items.Add(item.Tenkhachhang);
}
}
else
{
textBoxDiachi.Visible = true;
textBoxKhachhang.Visible = true;
label9.Visible = true;
comboKhachhang.Visible = false;
}
}