private void buttonInsert_Click(object sender, EventArgs e)
        {
            PhuKienNo inserted = new PhuKienNo();

            inserted.MaPhuKien  = textBoxMaPhuKien2.Text;
            inserted.TenPhuKien = textBoxTenPhuKien2.Text;
            if (textBoxDonViTinh2.Text != String.Empty)
            {
                inserted.DonViTinh_PK = double.Parse(textBoxDonViTinh2.Text);
            }
            if (textBoxGiaThanh2.Text != String.Empty)
            {
                inserted.GiaThanh_PK = double.Parse(textBoxGiaThanh2.Text);
            }
            try
            {
                BS_PhuKienNo.ThemPhuKienNo(inserted);
            }
            catch (Exception exc)
            {
                MessageBox.Show("Lỗi - " + exc.Message);
            }
            ShowPanel(1);
            HienThiDuLieu_PhuKienNo();
        }
        private void gridViewMain_DoubleClick(object sender, EventArgs e)
        {
            ShowPanel(3);
            PhuKienNo focusedRow = gridViewMain.GetFocusedRow() as PhuKienNo;

            textBoxMaPhuKien.Text  = focusedRow.MaPhuKien;
            textBoxTenPhuKien.Text = focusedRow.TenPhuKien;
            textBoxDonViTinh.Text  = focusedRow.DonViTinh_PK.ToString();
            textBoxGiaThanh.Text   = focusedRow.GiaThanh_PK.ToString();
        }
        private void buttonUpdate_Click(object sender, EventArgs e)
        {
            PhuKienNo updated = gridViewMain.GetFocusedRow() as PhuKienNo;

            updated.TenPhuKien = textBoxTenPhuKien.Text;
            if (textBoxDonViTinh.Text != String.Empty)
            {
                updated.DonViTinh_PK = double.Parse(textBoxDonViTinh.Text);
            }
            if (textBoxGiaThanh.Text != String.Empty)
            {
                updated.GiaThanh_PK = double.Parse(textBoxGiaThanh.Text);
            }
            try
            {
                BS_PhuKienNo.CapNhatPhuKienNo(updated);
            }
            catch (Exception exc)
            {
                MessageBox.Show("Lỗi - " + exc.Message);
            }
            ShowPanel(1);
            HienThiDuLieu_PhuKienNo();
        }