public bool AddSubJenisBarang(SubJenisBarang subJnsBrg)
        {
            bool result = false;

            query = "INSERT INTO sub_jenis_barang VALUES('" + subJnsBrg.Id_sub_jenis_barang + "','" + subJnsBrg.Nama_sub_jenis + "')";

            try
            {
                connect.Open();
                cmd = new MySqlCommand(query, connect);
                cmd.ExecuteNonQuery();
                result = true;
            }
            catch (MySqlException ex)
            {
                MessageBox.Show(ex.Message.ToString());
                result = false;
            }
            finally
            {
                connect.Close();
            }

            return result;
        }
        public bool UpdateSubJenisBarang(SubJenisBarang subJnsBrg)
        {
            bool result = false;

            query = "UPDATE sub_jenis_barang SET nama_sub_jenis = '" + subJnsBrg.Nama_sub_jenis + "' WHERE id_sub_jenis_barang = '" + subJnsBrg.Id_sub_jenis_barang + "'";

            try
            {
                connect.Open();
                cmd = new MySqlCommand(query, connect);
                cmd.ExecuteNonQuery();
                result = true;
            }
            catch (MySqlException ex)
            {
                MessageBox.Show(ex.Message.ToString());
                result = false;
            }
            finally
            {
                connect.Close();
            }

            return result;
        }