Biskilog/BISKILOG POS PREMIUM/Cashier Module/Invoice/quantityInvoice.cs

using BiskLog_Point_Of_Sale.Cashier_Module.Invoice;
using BiskLog_Point_Of_Sale.Invoice;
using BiskLog_Point_Of_Sale.Multiple_Login;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Point_Of_Sale_Managment.Cashier_Module.Invoice
{
    public partial class CashierquantityInvoice : Form
    {
        CashierAddInvoice addInvoice;
        string codeOfProduct = "";
        public CashierquantityInvoice(CashierAddInvoice invoice,string productCode = null)
        {
            InitializeComponent();
            addInvoice = invoice;
            codeOfProduct = productCode;
        }

        private void txtqty_TextChanged(object sender, EventArgs e)
        {

        }

        private async void quantityManual_KeyDown(object sender, KeyEventArgs e)
        {

            if (e.KeyCode == Keys.Enter)
            {
                int quantity = int.Parse(txtqty.Text);
                Task<int> task = new Task<int>(() =>
                {
                    int result = addInvoice.AddToList(quantity, codeOfProduct);
                    return result;
                });
                task.Start();
                int finalResult = await task;
                if (finalResult == 1)
                {
                    this.Close();
                }
                else if(finalResult == 2)
                {
                    string title = "Product is out of stock";
                    string message = "Sorry you do not have enough quantity of the item available";
                    NoAction noAction = new NoAction(title,message);
                    noAction.BringToFront();
                    noAction.ShowDialog();
                }
                else
                {
                    string title = "Sorry an error has occured";
                    string message = "Sorry, there was an error while adding the item to the invoice";
                    NoAction noAction = new NoAction(title, message);
                    noAction.BringToFront();
                    noAction.ShowDialog();
                    this.Close();
                }
            }
        }
        private void Txtqty_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == 8)
            {
            }
            else if ((e.KeyChar < 48) || (e.KeyChar > 57))
            {
                e.Handled = true;
            }
        }
    }
}