public CacMocLoTrinhDAOlmpl()
        {
            cacMocLoTrinhList = new List <CacMocLoTrinh>();

            string        strConn       = $"Server=localhost; Database=QLChuyenDi; Trusted_Connection=True;";
            SqlConnection sqlConnection = new SqlConnection(strConn);
            SqlCommand    sqlCommand    = new SqlCommand();
            String        query         = "select * from CACMOCLOTRINH";

            try
            {
                sqlCommand.CommandText = query;
                sqlCommand.CommandType = CommandType.Text;
                sqlCommand.Connection  = sqlConnection;

                sqlConnection.Open();
                SqlDataReader reader = sqlCommand.ExecuteReader();
                while (reader.Read())
                {
                    CacMocLoTrinh cacMocLoTrinh = new CacMocLoTrinh();

                    var currentFolder = AppDomain.CurrentDomain.BaseDirectory;
                    cacMocLoTrinh.MaChuyenDi = reader[0].ToString();
                    cacMocLoTrinh.MocLoTrinh = reader[1].ToString();

                    cacMocLoTrinhList.Add(cacMocLoTrinh);
                }
                sqlConnection.Close();
            }
            catch (Exception ex)
            {
                sqlConnection.Close();
                throw ex;
            }
        }
        public void addCacMocLoTrinh(CacMocLoTrinh cacMocLoTrinh)
        {
            using (SqlConnection connection = new SqlConnection("Server=localhost; Database=QLChuyenDi; Trusted_Connection=True;"))
            {
                String query = "INSERT INTO dbo.CACMOCLOTRINH (MACHUYENDI, MOCLOTRINH)" +
                               " VALUES (@MaChuyenDi,@MocLoTrinh)";

                using (SqlCommand command = new SqlCommand(query, connection))
                {
                    command.Parameters.AddWithValue("@MaChuyenDi", cacMocLoTrinh.MaChuyenDi);
                    command.Parameters.AddWithValue("@MocLoTrinh", cacMocLoTrinh.MocLoTrinh);

                    connection.Open();
                    int result = command.ExecuteNonQuery();

                    if (result < 0)
                    {
                        MessageBox.Show("fail");
                    }
                }
            }
        }