private void initForm()
        {
            this.txtCustomerName.Text = "";
            this.txtPhoneNumber.Text  = "";

            this.customerEditForm = null;

            this.customerManagementDtos = new List <CustomerManagementDto>();

            this.customerManagementDtos = this.customerManagementBus.GetAllCustomer();

            if (this.customerManagementDtos.Count <= 0)
            {
                MessageBox.Show(MessageContent.GET_CUSTOMER_ERROR, MessageTitle.GET_CUSTOMER_ERROR, MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }

            this.reloadDataGridView();
        }
        // Xử lý khi double click trường [Dánh sách khách hàng]
        private void doubleClickRow(object sender, EventArgs e)
        {
            if (this.customerManagementDtos.Count <= 0)
            {
                return;
            }

            if (this.dgvListCustomer.SelectedRows.Count == 0)
            {
                return;
            }

            string index = this.dgvListCustomer.SelectedRows[0].Cells[0].Value.ToString();

            CustomerManagementDto tempDto = this.customerManagementDtos[Convert.ToInt32(index) - 1];

            this.customerEditForm              = new frm_CustomerEdit(tempDto);
            this.customerEditForm.FormClosing += new FormClosingEventHandler(formClosing);
            this.customerEditForm.Show();
        }