private void btnCapPhatLenh_Click(object sender, EventArgs e)
{
if (txtMaCapLenh.Text != null)
{
DateTime date = DateTime.Now;
connection.CapLenhXuatBen(txtMaCapLenh.Text, DateTime.Now.ToString());
LoadCapLenh();
}
else
{
MessageBox.Show("Chua xac dinh xe duoc cap phat");
}
}