private void cell_Click(object sender, DataGridViewCellEventArgs e)
 {
     if (e.RowIndex >= 0)
     {
         DataGridViewRow row  = this.dgvCapNhatDichVu.Rows[e.RowIndex];
         int             maDV = int.Parse(row.Cells[1].Value.ToString());
         DichVu          db   = DichVu.GetDichVu(maDV);
         txtCapNhatDichVu.Text = db.TenDV.ToString();
         txtGia.Text           = db.GiaDV.ToString();
     }
 }
        private void btnLuuCapNhatDichVu_Click(object sender, EventArgs e)
        {
            DichVu s = GetDichVu();

            s.DichVuID = (int)dgvCapNhatDichVu.CurrentRow.Cells[1].Value;
            DichVu db = DichVu.GetDichVu(s.DichVuID);

            if (db != null)
            {
                db = s;
                db.InsertUpdate();
                MessageBox.Show("Sửa thành công!");
            }
            BindGrid(DichVu.GetAll());
        }
 private void btnThemDichVu_Click(object sender, EventArgs e)
 {
     try
     {
         DichVu s  = GetDichVu();
         DichVu db = DichVu.GetDichVu(s.DichVuID);
         if (db == null)
         {
             s.InsertUpdate();
             MessageBox.Show("Thêm dịch vụ thành công!");
         }
         BindGrid(DichVu.GetAll());
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message);
     }
 }
        private void btnThemCuaCTPP_Click(object sender, EventArgs e)
        {
            try
            {
                DichVu dv = DichVu.GetDichVu(int.Parse(cmbTenDichVu.SelectedValue.ToString()));
                if (txtSoLuong.Text == "")
                {
                    throw new Exception("Vui long nhap so luong!");
                }
                int index = dgvChiTietDichVu.Rows.Add();
                dgvChiTietDichVu.Rows[index].Cells[0].Value = (index + 1).ToString();
                dgvChiTietDichVu.Rows[index].Cells[1].Value = dv.TenDV;
                dgvChiTietDichVu.Rows[index].Cells[2].Value = dv.GiaDV + "";
                dgvChiTietDichVu.Rows[index].Cells[3].Value = txtSoLuong.Text + "";
                int thanhtien = dv.GiaDV.Value * int.Parse(txtSoLuong.Text);
                dgvChiTietDichVu.Rows[index].Cells[4].Value = thanhtien.ToString();

                dgvChiTietDichVu.Rows[index].Cells["id"].Value = dv.DichVuID + "";
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }