private void frmAddNhacungcap_Load(object sender, EventArgs e)
{
string table = "NhaCungCap";
string key = "CC";
txtMaNCC.Text = ThucThiSQL.CreateKey(table, key);
txtMaNCC.ReadOnly = true;
}
private void btnThem_Click(object sender, EventArgs e)
{
btnHuy.Enabled = true;
btnLuu.Enabled = true;
btnIn.Enabled = true;
grbThongtinHD.Enabled = true;
grbChitiet.Enabled = false;
dataGridView1.DataSource = null;
ResetValue(); // gọi hàm để reset giá trị trong phiếu về rỗng
string table = "HoaDon";
string key = "HD";
txtMaHD.Text = ThucThiSQL.CreateKey(table, key);
txtMaHD.ReadOnly = true;
txtNgaylap.ReadOnly = true;
}
private void btnThemHD_Click(object sender, EventArgs e)
{
dgvCT.DataSource = null;
dgvCT.Rows.Clear();
ResetValues();
resetValueHang();
grbChitiet.Enabled = false;
btnThemHD.Enabled = false;
grbThongtin.Enabled = true;
btnLuuHD.Enabled = true;
btnHuyHD.Enabled = false;
btnInHD.Enabled = false;
txtMaHD.ReadOnly = true;
txtTenNV.ReadOnly = true;
txtTenKH.ReadOnly = true;
txtDienthoai.ReadOnly = true;
txtTenHang.ReadOnly = true;
txtTongTien.ReadOnly = true;
txtMaHD.Text = ThucThiSQL.CreateKey("HDB");
}