private void button5_Click(object sender, EventArgs e)
        {
            if (dataGridView1.Rows.Count <= 0)
            {
                MessageBox.Show("Tidak ada data untuk di simpan", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            else
            {
                db_Faktur_Pemesanan df = new db_Faktur_Pemesanan()
                {
                    No_Faktur_Pemesanan = textBox1.Text,
                    ID_Karyawan         = textBox9.Text,
                    ID_Supplier         = textBox7.Text,
                    Tanggal             = dateTimePicker1.Text
                };
                db.AddTodb_Faktur_Pemesanan(df);
                db.SaveChanges();

                for (int i = 0; i < dataGridView1.RowCount; i++)
                {
                    string ih = "";
                    string ah = "";
                    int    h  = 0;
                    int    hh = 0;
                    try {
                        ih = dataGridView1.Rows[i].Cells[1].Value.ToString();
                        ah = dataGridView1.Rows[i].Cells[3].Value.ToString();
                        hh = int.Parse(dataGridView1.Rows[i].Cells[5].Value.ToString());
                        h  = int.Parse(dataGridView1.Rows[i].Cells[6].Value.ToString());
                    }
                    catch (Exception) { }

                    db_Detail_Faktur_Pemesanan dbf = new db_Detail_Faktur_Pemesanan()
                    {
                        No_Faktur_Pemesanan = textBox1.Text,
                        ID_Barang           = ih,
                        Nama_Barang         = ah,
                        Harga  = hh,
                        Jumlah = h
                    };
                    db.AddTodb_Detail_Faktur_Pemesanan(dbf);
                    db.SaveChanges();
                }
                MessageBox.Show("Transaksi berhasil", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
                button2.Enabled = false;
                button5.Enabled = false; button3.Enabled = false;
            }
        }