public KhachHang(int manv)
{
MaKH = manv;
if (MaKH == 0)
{
TenKH = DiaChi = SDT = "";
return;
}
DataTable dt = KhachHangControl.layDuLieu(manv);
TenKH = dt.Rows[0]["TenKH"].ToString();
DiaChi = dt.Rows[0]["DiaChi"].ToString();
SDT = dt.Rows[0]["SDT"].ToString();
}